A 70-year-old man presents with weakness of his right arm and leg. His symptoms began yesterday and are now resolved. He also reports a 6-month history of recurrent headaches and fatigue. He is a nonsmoker. His medical history is significant for high blood pressure. His blood pressure is 167/88 mm Hg, his oxygen saturation is 93% on room air, his face is plethoric, and a right carotid bruit is heard. Other findings on physical examination are normal. Diagnostic testing results are shown in Table 9.Q5. Carotid ultrasonography shows a 30% stenotic lesion in the right carotid. The patient is hospitalized and begins antiplatelet therapy. Which of the following should you order next?
Rationale:
JAK2 V617F mutation testing should be ordered next.
The patient's plethoric face, recurrent headaches, fatigue, and transient ischemic attack-like symptoms, coupled with unexplained hypoxemia (93% SpO2), strongly suggest a hyperviscosity syndrome potentially caused by polycythemia vera. While Table 9.Q5 is not provided, these clinical findings necessitate investigating a myeloproliferative neoplasm. The JAK2 V617F mutation is present in over 95% of polycythemia vera cases, making this the most appropriate and targeted diagnostic step to confirm the suspected underlying hematological disorder.
B: Fluorescence in situ hybridization (FISH) for BCR-ABL testing This test primarily diagnoses chronic myeloid leukemia, which typically presents with splenomeg
A 20-year-old white woman has been admitted to the hospital with pulmonary embolism. She has no chronic illnesses and is receiving no medications except for combination estrogen-progesterone birth control pills that she started using approximately 1 year earlier. Results were normal for a complete blood cell count, baseline prothrombin time, activated partial thromboplastin time (aPTT), and tests of kidney and liver function. The patient is currently receiving therapeutic doses of intravenous unfractionated heparin, and her aPTT is therapeutic at 72 seconds. A panel of thrombophilia tests has been performed. Which of the following statements about her thrombophilia test results is correct?
Rationale:
DNA-based testing for factor V Leiden and prothrombin G20210A mutations are reliable.
DNA-based tests for Factor V Leiden and prothrombin G202
A child who has just received chemotherapy for neuroblastoma is being discharged. Which statement by the parent indicates a need for additional teaching?
Rationale:
I will take a rectal temperature daily and report a temperature greater than 101°F (38.3°C) immediately indicates a need for additional teaching.
Chemotherapy causes myelosuppression, leading to neutropenia and increased infection risk. Taking a rectal temperature is contraindicated in neutropenic patients due to the risk of mucosal trauma, bleeding, and introducing bacteria from the rectum into the bloodstream, potentially causing sepsis. Parents should be taught to use oral, axillary, or tympanic routes instead.
A: I will inspect the skin often for any lesions Chemotherapy can impair skin integrity and wound healing. Frequent skin inspection helps identify infections, rashes, or breakdown early, which is crucial for prompt intervention and preventing complications in an
You are evaluating a 5-year-old male child with multiple ecchymoses distributed all over the extremities and trunk; examination reveal a palpable spleen $3 \mathrm{~cm}$ below the left costal margin. Lab findings include: hemoglobin, 11.3 g/dL; white blood cell count, 8700/mm3; platelets count, 21000/mm3. Of the following, the most proper NEXT step is
Rationale:
A bone marrow study is the most proper next step.
Severe thrombocytopenia (21,000/mm3) combined with splenomegaly in a child warrants urgent investigation into the underlying
The first laboratory marker in progressive iron deficiency anemia is
Rationale:
Falling of serum ferritin is the first laboratory marker in progressive iron deficiency anemia.
Serum ferritin levels directly reflect the body's iron stores and are the most sensitive indicator of early iron depletion. As iron deficiency progresses, the body first mobilizes its stored iron, causing a measurable drop in circulating ferritin even before other indicators like serum iron or hemoglobin are significantly affected. This makes it the earliest detectable laboratory change.
A: depletion of bone marrow hemosiderin Depletion of bone marrow hemosiderin, while an early sign of iron store reduction, requires an invasive biopsy, making it less practical as a routine first laboratory marker compared to a simple blood test.
C: decrease of serum iron and increase of the iron-binding capacity These changes occur later in iron deficiency, reflecting reduced iron transport and availability after initial stores are significantly depleted, thus not representing the absolute earliest laboratory marker.
D: decrease hemoglobin synthesis Decreased hemoglobin synthesis signifies a more advanced stage of iron deficiency, directly impacting red blood cell function and leading to anemia itself, long after ferritin levels have begun to decline.
School-age children with cancer often experience body image disturbances due to hair loss, moon face, or debilitation. Which intervention is most appropriate?
Rationale:
Encourage them to wear a wig similar to their usual hairstyle.
School-age children value peer acceptance and appearance. Hair loss from cancer treatment significantly impacts their body image and self-esteem, leading to emotional distress. Wearing a wig that resembles their pre-illness hairstyle helps normalize their appearance, providing a sense of control and familiarity. This intervention supports their psychological well-being by mitigating visible changes, fostering confidence, and promoting social integration during a challenging time.
B: Emphasize the benefits of the therapy they are receiving While important, focusing on treatment benefits does not directly alleviate a child's distress over physical appearance changes like hair loss or moon face. This approach bypasses the immediate psychosocial concern.
C: Have them play only with other children with cancer Restricting interaction to only other children with cancer promotes isolation and limits opportunities for normal social development. This approach fails to address their body image concerns directly or foster broader peer acceptance.
D: Use diversional techniques to avoid discussing changes in the body Avoiding discussions about body changes prevents children from processing their feelings and adapting to their new reality. Suppressing these important conversations hinders emotional coping and healthy psychological adjustment to illness.
Matching: Red blood cell aplasia - Rarely needs multiple transfusions
Rationale:
Transient erythroblastopenia of childhood rarely needs multiple transfusions.
Transient erythroblastopenia of childhood (TEC) is a self-limiting red cell aplasia typically resolving spontaneously within weeks to months. Most children with TEC maintain adequate hemoglobin levels, often requiring no transfusions or only single transfusions during acute phases. Its transient nature and generally mild course mean prolonged, frequent transfusion support is usually unnecessary, distinguishing it from chronic aplasias.
A: Diamond-Blackfan Diamond-Blackfan Anemia is a chronic congenital red cell aplasia often requiring frequent, long-term blood transfusions to manage severe anemia. Its persistent nature necessitates ongoing supportive care, making it a condition characterized by significant transfusion dependence.
C: Both This option is incorrect because Diamond-Blackfan Anemia typically requires multiple, often lifelong, transfusions due to its chronic nature. Only Transient erythroblastopenia of childhood aligns with rarely needing multiple transfusions among the two conditions.
D: Neither This option is incorrect as Transient erythroblastopenia of childhood (TEC) precisely fits the description of rarely needing multiple transfusions. TEC is characteristically self-resolving, making extensive transfusion support infrequent.
Considering factor replacement therapy, what level of factor VIII is appropriate for mild bleeding?
Rationale:
A 20% factor VIII level is appropriate for mild bleeding.
For mild bleeding episodes, such as minor cuts or superficial bruises, achieving a factor VIII level of 20% is typically sufficient. This modest increase in circulating factor VIII activity provides enough hemostatic support to control localized bleeding without requiring higher, potentially unnecessary, factor concentrations. It effectively promotes clot formation for minor traumas.
A: 100% Reaching 100% factor VIII is reserved for severe bleeding, major surgery, or life-threatening hemorrhage. This high target is excessive and unnecessary for managing mild bleeding events.
B: 80% An 80% factor VIII level is generally targeted for moderate to severe bleeding
Which of the following can be manifestations of leukemia in a child? (Select one that does not apply..)
Rationale:
Excessive weight gain is not typically a manifestation of leukemia in a child.
Leukemia often causes symptoms related to bone marrow dysfunction, such as fatigue, anemia, and weight loss, due to increased metabolic demands from rapidly proliferating cancerous cells and reduced appetite. Excessive weight gain is not a characteristic clinical sign of pediatric leukemia; instead, children frequently experience anorexia and cachexia. This option describes a condition contrary to the typical systemic effects of childhood cancer, making it the one that does not apply.
A: Leg pain Leukemic cell infiltration into bones and joints frequently causes musculoskeletal discomfort, presenting as persistent leg pain, particularly at night or with activity, due to increased pressure and inflammation within the bone marrow.
B: Fever Unexplained fevers are common in children with leukemia, often resulting from neutropenia-induced infections or directly from the inflammatory cytokines released by the proliferating malignant cells themselves, indicating systemic illness.
D: Bruising Leukemia impairs platelet production, leading to thrombocytopenia, which manifests as easy bruising, petechiae, or purpura. This reduced clotting capability is a frequent early sign of bone marrow failure.
The LEAST helpful historical clue in the diagnosis of hemolytic anemia is
Rationale:
Chronic infection is the least helpful historical clue in the diagnosis of hemolytic anemia.
Chronic infection is a general condition that can lead to various types of anemia, including anemia of chronic disease, but it doesn't specifically point towards hemolysis as its primary mechanism. Unlike more direct indicators, its presence alone provides minimal diagnostic specificity for red blood cell destruction. Many systemic illnesses feature chronic infection, diluting its utility for hemolytic anemia identification.
A: mycoplasma infection Mycoplasma infection frequently precipitates cold agglutinin disease, a recognized form of autoimmune hemolytic anemia. Its direct association with a specific hemolytic mechanism makes it a valuable diagnostic indicator.
B: gallstones Gallstones often develop in chronic hemolytic anemia patients due to elevated bilirubin levels from sustained red blood cell destruction. Their presence strongly suggests an underlying long-term hemolytic process.
C: splenectomy of a family member A family history of splenectomy points to inherited hemolytic disorders like hereditary spherocytosis, where the spleen prematurely destroys red blood cells. This genetic link offers crucial diagnostic insight.
A child with sickle cell anemia is scheduled for an exchange transfusion. What should the nurse teach the family?
Rationale:
The procedure reduces the number of circulating sickle cells and slows down the cycle of hypoxia, thrombosis, and tissue ischemia.
An exchange transfusion fundamentally replaces a significant portion of the child's red blood cells with healthy donor cells. This therapeutic intervention dramatically decreases the concentration of defective sickle cells, thereby improving oxygen-carrying capacity and blood flow. By mitigating the presence of sickled cells, the procedure effectively interrupts the dangerous progression of tissue damage caused by impaired circulation and oxygen deprivation.
A: The procedure is done to prevent further sickling during a vaso-occlusive crisis. While it helps mitigate sickling, the primary aim is to replace existing sickle cells and improve oxygenation, not solely prevent further sickling during a crisis.
B: The procedure reduces side effects from blood transfusions. Exchange transfusions are complex procedures involving blood transfusions; they carry their own risks and do not inherently reduce side effects associated with general blood product administration.
C: The procedure is a routine treatment for sickle cell crisis. Exchange transfusions are specialized, invasive interventions reserved for severe, life-threatening complications of sickle cell disease, not a routine first-line treatment for every crisis.
All the following conditions may be associated with iron deficiency EXCEPT
Rationale:
Prolonged intravascular hemolysis is the condition not typically associated with iron deficiency, but rather with iron overload.
Correct Option Explanation:
Prolonged intravascular hemolysis causes the release of iron from destroyed red blood cells, overwhelming the body's iron-binding capacity. This leads to increased free iron and often results in iron overload, rather than deficiency. The constant breakdown of red cells liberates heme iron, which the body struggles to excrete, causing accumulation in tissues. Therefore, iron deficiency is not a typical consequence of this process.
Incorrect Options Explanation:
A: hookworm infestation Hookworm infestation causes chronic gastrointestinal blood loss, as the parasites feed on blood from the intestinal mucosa. This persistent hemorrhage directly depletes the body's iron stores, invariably leading to iron deficiency anemia.
C: celiac disease Celiac disease impairs nutrient absorption in the small intestine, specifically damaging the villi responsible for iron uptake. This malabsorption significantly reduces dietary iron assimilation into the bloodstream.
D: congenital heart disease with right to left shunt Cong
Which of the following central nervous system (CNS) abnormalities have been linked to iron deficiency anemia?
Rationale:
Poor concentration is a central nervous system abnormality linked to iron deficiency anemia.
Iron is crucial for neurotransmitter synthesis, myelination, and overall brain metabolism. Deficiency impairs these vital processes, particularly impacting cognitive functions like attention, memory, and processing speed. This disruption manifests as difficulty focusing, reduced mental stamina, and impaired learning abilities, making poor concentration a well-documented neurological consequence of iron deficiency anemia in both children and adults.
A: seizure While severe iron deficiency can exacerbate existing seizure disorders, it is not typically identified as a primary cause or direct CNS abnormality leading to new-onset seizures.
B: ataxia Ataxia, characterized by impaired coordination and balance, is generally associated with cerebellar dysfunction or peripheral neuropathy, not a direct or common manifestation of iron deficiency anemia.
D: blindness Blindness is a severe visual impairment primarily resulting from optic nerve damage, retinal disorders, or cortical lesions, none of which are directly caused by iron deficiency anemia.
All of the following are true about Fanconi anemia EXCEPT
Rationale:
Fanconi anemia is not characterized by stable chromosomes.
Fanconi anemia is a genetic disorder primarily characterized by progressive bone marrow failure and increased cancer risk. A hallmark feature of this condition is significant chromosomal
One of the following features DOES NOT fit von-Willebrand disease
Rationale:
D: impaired platelets aggregation
Von Willebrand disease is characterized by deficient or dysfunctional von Willebrand factor, which impairs platelet adhesion to the vessel wall and stabilizes Factor VIII. Standard platelet aggregation,
For the patient described in Questions 19 and 20, initial treatment at the time of diagnosis may include (may choose more than one)
Rationale:
Initial treatment for the patient at diagnosis may include transfusion.
Transfusion is indicated for patients presenting with severe, symptomatic anemia, or significant active bleeding at diagnosis, particularly when immediate improvement in oxygen-carrying capacity
You are evaluating a 7-year-old male child with cervical lymphadenopathy; the MOST likely finding that raise your suspicion of malignancy is
Rationale:
Fixed nodes are the most likely finding that raises suspicion of malignancy in a 7-year-old male with cervical lymphadenopathy.
Fixed nodes suggest infiltration into surrounding tissues, a hallmark characteristic of malignant processes rather than benign inflammatory conditions. Their immobility indicates a lack of discrete encapsulation or adherence to underlying structures, making them highly suspicious for neoplastic involvement, demanding immediate further investigation to rule out serious pathology.
A: matted nodes Matted nodes, while concerning, often indicate chronic inflammation or granulomatous diseases like tuberculosis, not exclusively malignancy. Their adherence to each other suggests a coalescent inflammatory response to a persistent irritant.
B: fluctuant nodes Fluctuant nodes typically indicate liquefaction and pus formation within the node, characteristic of an abscess or acute suppurative infection. This finding strongly suggests a benign, treatable infectious process requiring drainage.
D: presence of systemic symptoms Systemic symptoms like fever or weight loss can accompany both infectious and malignant conditions, making them non-specific indicators for primary malignancy. Such generalized signs necessitate further evaluation but lack unique diagnostic precision.
Growth retardation is not evident in anemia of
Rationale:
Growth retardation is not evident in anemia of spherocytosis.
Spherocytosis is a hemolytic anemia caused by red blood cell membrane defects, leading to premature destruction. While it causes anemia, the primary pathology does not typically involve systemic inflammation or direct hormonal disruptions that impede growth. Children with spherocytosis, if adequately managed, can maintain normal growth patterns because the fundamental mechanisms for cellular proliferation and skeletal development are not inherently compromised by the red cell defect.
A: chronic disease Anemia of chronic disease often involves systemic inflammation, which suppresses erythropoiesis and can directly inhibit growth hormone pathways, leading to stunted development.
B: malnutrition Nutritional deficiencies, especially iron or protein, are fundamental to growth processes. Severe malnutrition directly impairs cellular division and overall somatic development, causing significant growth failure.
C: Fanconi anemia Fanconi anemia is a severe genetic disorder characterized by bone marrow failure and congenital abnormalities. These systemic defects profoundly disrupt normal cellular function and organ development, resulting in severe growth stunting.
Which of the following tests measures the step from fibrinogen to fibrin conversion?
Rationale:
Thrombin time measures the step from fibrinogen to fibrin conversion.
The thrombin time (TT) directly assesses the final stage of coagulation, specifically the conversion of fibrinogen to insoluble fibrin by exogenous thrombin. This test evaluates the quantity and function of fibrinogen, detecting deficiencies or dysfunctions, and identifying the presence of thrombin inhibitors like heparin, which would prolong the clotting time, thus pinpointing issues in this crucial final step.
A: prothrombin time Measures the extrinsic and common pathways of coagulation, initiated by tissue factor, assessing factors VII, X, V, II, and fibrinogen, not solely the final fibrinogen-fibrin conversion.
B: partial thromboplastin time Evaluates the intrinsic and common coagulation pathways, involving factors XII, XI, IX, VIII, X, V, II, and fibrinogen, providing a broader assessment than the specific fibrinogen-fibrin step.
C: bleeding time Assesses platelet function and vascular integrity, indicating the time it takes for a standardized skin incision to stop bleeding, entirely unrelated to the coagulation cascade's fibrinogen-fibrin step.
A child with leukemia has a white blood cell count of 5000/mm³ with 5% polys and 3% bands. Which analysis is most appropriate?
Rationale:
The absolute neutrophil count (ANC) is 400/mm³, and the child is neutropenic.
To calculate the ANC, multiply the total white blood cell count (50
Decisions about transfusion of a child with sickle cell disease should be made on the following bases EXCEPT
Rationale:
Decisions about transfusion of a child with sickle cell disease should NOT be made on the basis of age of the patient.
While age can influence general treatment approaches, it is not a primary, direct determinant for initiating a transfusion in sickle cell disease. Transfusion decisions prioritize acute clinical needs and specific hematological parameters, not merely chronological age. A child's age alone does not dictate the urgency or necessity of transfusion; physiological indicators are paramount for effective clinical management.
B: clinical condition A patient's clinical presentation, such as severe anemia symptoms, acute chest syndrome, or stroke, directly dictates the immediate need for transfusion. This crucial factor guides urgent intervention decisions effectively.
C: hemoglobin level Hemoglobin level is a critical laboratory parameter indicating the severity of anemia, profoundly influencing transfusion thresholds and therapeutic goals in sickle cell patients. It provides objective evidence for intervention.
D: reticulocyte count Reticulocyte count assesses bone marrow's red blood cell production, helping differentiate causes of anemia. A low count suggests
Matching: Anemia - Orotic aciduria
Rationale:
Macrocytic anemia is associated with Orotic aciduria.
Orotic aciduria, caused by a defect in pyrimidine synthesis, impairs DNA production. This deficiency leads to megaloblastic anemia, where red blood cell precursors in the bone marrow cannot divide properly despite continued cytoplasmic growth. Consequently, the mature erythrocytes released into circulation are abnormally large, characterized as macrocytic. This reflects the essential role of pyrimidines in proper erythrocyte maturation and cell division.
A: Microcytic: Microcytic anemia involves smaller-than-normal red blood cells, typically arising from conditions like iron deficiency or thalassemia, which impair
A 2-year- old boy presented with recurrent skin and respiratory tract infections since early infancy, he had abnormally eczematous skin of the upper and lower limbs. His initial tests showed normal liver and renal functions with CBC showing low platelets count. He has similarly affected male cousin. Of the following, the MOST likely diagnosis is
Rationale:
Wiskott-Aldrich syndrome is the MOST likely diagnosis.
Wiskott-Aldrich syndrome (WAS) presents with the classic triad of thrombocytopenia, immunodeficiency (recurrent infections), and eczema, precisely matching the patient's symptoms. The low platelet count, recurrent skin and respiratory infections, and eczematous skin are hallmarks. The X-linked inheritance pattern is further supported by the similarly affected male cousin, strongly indicating WAS as the most probable diagnosis.
A: Glanzmann thrombasthenia This is a platelet function defect, typically presenting with normal platelet counts and bleeding, but without the immunodeficiency or eczematous skin observed in this patient's presentation.
C: Bernard-Soulier syndrome This disorder involves large, dysfunctional platelets and thrombocytopenia, causing bleeding. It does not, however, account for the severe recurrent infections or widespread
Matching: Anemia - Hypothyroidism
Rationale:
Anemia associated with hypothyroidism is typically normocytic.
Hypothyroidism can cause anemia of chronic disease, which typically presents as normocytic, normochromic anemia. Thyroid hormones influence erythropoiesis, and their deficiency impairs red blood cell production without affecting cell size initially. This common presentation reflects a blunted bone marrow response, leading to fewer but normally sized red blood cells, rather than a specific defect in hemoglobin synthesis or maturation.
A: Microcytic Microcytic anemia suggests iron deficiency or thalassemia, where red blood cells are abnormally small due to impaired hemoglobin synthesis. Hypothyroidism does not inherently cause this reduction in cell volume.
C: Macrocytic Macrocytic anemia involves abnormally large red blood cells, often linked to vitamin B12 or folate deficiency, or liver disease. Hypothyroidism itself does not directly lead to megaloblastic changes in erythropoiesis.
Which of the following symptoms/signs is a manifestation of polycythemia?
Rationale:
Deep vein thrombosis is a manifestation of polycythemia.
Polycythemia involves an overproduction of red blood cells, increasing blood viscosity and making it thicker. This hyperviscosity significantly elevates the risk of clot formation within blood vessels. Deep vein thrombosis (DVT) is a common and serious thrombotic complication resulting directly from this enhanced propensity for coagulation, often affecting the legs due to sluggish blood flow.
A: lymphadenopathy Lymphadenopathy, or swollen lymph nodes, typically indicates immune response to infection or malignancy, not directly caused by the increased red blood cell count characteristic of polycythemia vera.
C: epistaxis Epistaxis (nosebleeds) can occur in various bleeding disorders or hypertension, but it is not a primary or direct consequence of the increased blood viscosity and clotting risk seen in polycythemia.
D: seizures Seizures represent abnormal brain electrical activity, often linked to neurological disorders, electrolyte imbalances, or severe hypoxia; they are not a typical or direct symptom of elevated red blood cell mass in polycythemia.
A 9-month-old boy appears pale. Examination reveals a palpable liver $3 \mathrm{~cm}$ below the right costal margin and palpable spleen $4 \mathrm{~cm}$ below the left costal margin. Lab findings include: hemoglobin concentration, 6.4 g/dl; mean corpuscular volume (MCV), 67 fL; and WBC, 15,000/mm3. Of the following, The MOST valuable test to confirm the diagnosis is
Rationale:
Hemoglobin electrophoresis is the most valuable test to confirm the diagnosis.
The severe microcytic anemia (Hb 6.4, MCV 67) coupled with hepatosplenomeg
Chronic thrombocytopenia in a male with eczema should suggest
Rationale:
Chronic thrombocytopenia in a male with eczema should suggest Wiskott-Aldrich syndrome.
Wiskott-Aldrich syndrome (WAS) is an X-linked primary immunodeficiency characterized by the classic triad of thrombocytopenia (often chronic and microplatelets), eczema, and recurrent infections. This specific combination, particularly chronic thrombocytopenia and eczema in a male, strongly points to WAS, necessitating further immunological evaluation. Genetic testing for mutations in the WAS gene confirms the diagnosis, guiding appropriate management strategies for this complex immune disorder.
A: infection: While infections are common in WAS, "infection" alone does not explain the chronic thrombocytopenia and eczema co-occurrence as a primary underlying cause. It's often a consequence of the immune defect.
B: malignancy: Malignancy can cause thrombocytopenia, but it doesn't typically present with the specific co-occurrence of chronic eczema as a direct, primary indicator for this particular combination of symptoms.
C: Evans syndrome: Evans syndrome involves autoimmune hemolytic anemia and immune thrombocytopenia, but it does not typically include eczema as a defining or commonly associated clinical feature in its diagnostic criteria.
A 22-year-old man is admitted to the hospital for an elective cholecystectomy. You are asked to see him because he had anemia on preoperative testing. He tells you that he has always been told by his physicians that he has mild anemia; his medical history is otherwise unremarkable. His vital signs are normal. His conjunctivae are mildly icteric, and the spleen is palpable in the left upper quadrant. Findings on the remainder of the physical examination are normal. Diagnostic testing results are shown in Table 9.Q3. Which of the following tests would most likely help confirm the diagnosis?
Rationale:
Osmotic fragility test would most likely help confirm the diagnosis.
The patient's chronic mild anemia since childhood, icterus, and palpable splenomegaly strongly suggest an inherited hemolytic anemia, particularly
Fresh frozen plasma (FFP) transfusion/replacement is indicated in all the following conditions EXCEPT
Rationale:
Fresh frozen plasma (FFP) transfusion/replacement is NOT indicated for an 11-year-old child with thrombotic thrombocytopenic purpura (TTP) post allogenic bone marrow transplantation.
TTP is characterized by ADAMTS13 deficiency, leading to platelet aggregation and microvascular thrombosis. FFP transfusion provides ADAMTS13, but the primary treatment for TTP, especially post-transplant, is plasma exchange (PLEX). PLEX removes harmful antibodies and replaces plasma, which is more effective than FFP transfusion alone for severe TTP. FFP could potentially exacerbate fluid overload without adequately addressing the underlying pathology.
A: a 9-year-old child with chronic liver disease with prolonged clotting times who needs a liver biopsy. Chronic liver disease impairs synthesis of clotting factors, prolonging PT/INR. FFP provides these essential factors, reducing bleeding risk before invasive procedures like a liver biopsy, making it a critical prophylactic measure.
B: a 6-year-old child with protein S deficiency and significant deep venous thrombosis. Protein S deficiency is a prothrombotic state. FFP contains protein S and other natural anticoagulants. While not primary treatment for DVT, FFP might be considered in specific
Which of the following hemoglobinopathies is transfusion dependent?
Rationale:
Homozygous β-thalassemia is transfusion dependent.
Homozygous β-thalassemia, also known as thalassemia major, involves a severe deficiency or absence of beta-globin chains, leading to profound ineffective erythropoiesis and chronic hemolytic anemia. Patients cannot produce sufficient functional hemoglobin, necessitating regular blood transfusions to sustain life, prevent severe organ damage, and manage symptoms like growth failure and bone deformities. This lifelong dependency makes it a classic transfusion-dependent hemoglobinopathy.
A: alpha thalassemia trait Individuals with alpha thalassemia trait are typically asymptomatic carriers, experiencing only mild microcytic anemia without requiring any medical intervention or blood transfusions for management.
B: heterozygous beta thalassemia Heterozygous beta thalassemia, or beta thalassemia minor, usually presents as a mild microcytic, hypochromic anemia, which is generally asymptomatic and does not necessitate regular blood transfusions.
C: hemoglobin H disease Hemoglobin H disease is an intermediate alpha thalassemia syndrome; while it can cause moderate to severe anemia, it often does not require chronic transfusion therapy unless complications or severe symptomatic anemia arise.