Hematopathology Practice Questions

Q: Which of the following best describes the shape of Birbeck granules?

Resembling a tennis racket. ***Tennis racket*** [1] - Birbeck granules are distinctive for their **tennis racket shape**, consisting of an elongated area and a bulbous end [1]. - They are typically found in **Langerhans cell histiocytosis** and are associated with **CD1a+** staining [1]. *Bat* - The term "bat" does not accurately describe the structure or morphology of Birbeck granules. - Unlike bats, Birbeck granules have a **specific elongated shape** with a bulbous tip rather than bat wings. *Hockey stick* - This shape implies a straight handle and a flat blade, which does not represent the **widely tapered ends** of Birbeck granules. - The **characteristic morphology** does not align with any hockey stick features. *Ball* - The term "ball" indicates a spherical shape, which is not fitting for Birbeck granules, as they are **elongated** and striated. - Birbeck granules are defined specifically by their **tapered structure**, contrasting markedly with a circular form. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, p. 630.

Q: What do Döhle bodies represent in neutrophils?

Presence of dilated endoplasmic reticulum in neutrophils. ***Presence of dilated endoplasmic reticulum in neutrophils*** - **Döhle bodies** are inclusions found in the cytoplasm of neutrophils, classic hallmarks of **severe infection** or inflammatory conditions. - They represent remnants of dilated **rough endoplasmic reticulum**, which appears as pale-blue, irregular aggregates on stained blood smears. *Increased mitochondria in neutrophils* - An increase in mitochondria is not a characteristic feature associated with Döhle bodies. - While mitochondria are essential for cellular energy production, their proliferation does not form visible inclusions known as Döhle bodies. *Golgi apparatus proliferation in neutrophils* - Proliferation of the Golgi apparatus is not typically observed as a Döhle body. - The Golgi apparatus is involved in protein modification and packaging, but its changes do not manifest as these specific inclusions. *Lysosomal activity in neutrophils* - Lysosomal activity involves the breakdown of cellular debris and pathogens and is not directly related to the formation of Döhle bodies. - Although lysosomes are abundant in neutrophils, their activity does not result in the presence of Döhle bodies.

Q: Which acquired condition is most commonly associated with spherocytes?

Autoimmune hemolytic anemia (AIHA). ***Autoimmune haemolytic anemia*** - This condition is characterized by the **production of antibodies** against the patient's own red blood cells, leading to **destruction** and the formation of spherocytes [1]. - The presence of ***maximum spherocytes*** in blood smears is a hallmark of this disorder due to **extravascular hemolysis** [1]. *Aplastic anemia* - Aplastic anemia is mainly due to **failure of hematopoiesis**, resulting in pancytopenia rather than spherocyte formation. - It typically presents with **normocytic** or **macrocytic anemia**, not spherocytes, as the bone marrow is not producing enough red blood cells [2]. *Vit B12 deficiency* - Vit B12 deficiency usually causes **macrocytic anemia** characterized by **megaloblastic changes** in the bone marrow and peripheral blood, not the formation of spherocytes. - The primary indicators would be **hypersegmented neutrophils** and large, ovalocytes rather than spherocytes. *None* - This option incorrectly implies that no condition causes maximum spherocytes, while autoimmune hemolytic anemia is the known condition for this finding. - Spherocytes are a specific sign in hemolytic processes and are definitely seen in conditions like **autoimmune hemolytic anemia**. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 602-603. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Red Blood Cell and Bleeding Disorders, pp. 662-663.

Q: The subtype of Hodgkin's disease which is histogenetically distinct from all the other subtypes is:

Lymphocyte predominant. ***Lymphocyte predominant*** - This subtype is characterized by the presence of **popcorn cells** (a variant of Reed-Sternberg cells) and is histogenically distinct from other forms of Hodgkin's lymphoma [1]. - It typically features a **predominance of lymphocytes**, contrasting with the other subtypes that may show mixed cellularity or different cell backgrounds [1]. *Lymphocyte depleted* - This subtype has a high number of **Reed-Sternberg cells** and is often associated with **immunocompromised states**, making it less distinct than lymphocyte predominant [2]. - It typically presents with a poor prognosis and is characterized by **depletion** of lymphocytes rather than predominance [2]. *Nodular sclerosis* - This is one of the most common subtypes of Hodgkin's lymphoma, featuring **fibrosis** and often affecting mediastinal lymph nodes. - While distinct, it shares histopathological features with other standard forms of Hodgkin's lymphoma, thus not being **histogenically distinct**. *Mixed cellularity* - This subtype presents a heterogeneous mix of cells, including **Reed-Sternberg cells** and leukocytes, and is the most frequent subtype after nodular sclerosis [2]. - It is associated with lower lymphocyte predominance, thus lacking the unique histological characteristics found in lymphocyte predominant Hodgkin's lymphoma. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, p. 618. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 559-560.

Q: BCR-ABL fusion gene is MOST CHARACTERISTICALLY seen in?

CML. ***CML*** - The **BCR-ABL gene mutation** is characteristic of **Chronic Myeloid Leukemia (CML)**, resulting from a translocation between chromosomes 9 and 22 [1]. - This mutation leads to the production of the **BCR-ABL fusion protein**, which promotes cell proliferation and inhibits apoptosis [1]. *AML* - Acute Myeloid Leukemia (AML) does not typically exhibit the **BCR-ABL fusion gene**; rather, it is associated with various other genetic mutations. - Key features of AML include **myeloblast proliferation** and it presents with different cytogenetic abnormalities like **FLT3 or NPM1 mutations**. *CLL* - Chronic Lymphocytic Leukemia (CLL) is characterized by the accumulation of **mature lymphocytes**, not the **BCR-ABL mutation**. - It is often associated with mutations such as **TP53** and **NOTCH1**, distinct from myeloid malignancies. *ALL* - Acute Lymphoblastic Leukemia (ALL) is primarily linked with **chromosomal translocations** involving **the TCF3** gene or others, but not specifically with **BCR-ABL**. - In ALL, **lymphoid progenitor cells** proliferate, whereas CML is primarily a **myeloid process** associated with the BCR-ABL gene [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 624-625.

Q: A 62-year-old man presents with back pain for 4 months. Laboratory tests show a white blood cell count of 3700/microliter, hemoglobin of 10.3 g/dL, hematocrit of 31.1%, mean corpuscular volume of 85 fL, and a platelet count of 110,000/microliter. His total serum protein is 8.5 g/dL, with an albumin level of 4.1 g/dL. A chest radiograph shows lucencies in the vertebral bodies. A sternal bone marrow aspirate yields a dark red jelly-like material. Which cell type is most likely to be numerous in this aspirate?

Plasma cells. ***Plasma cells*** - The presence of **dark red jelly-like material** in the bone marrow aspirate indicates a possible **myeloma**, which is characterized by an abundance of plasma cells [1]. - The lucencies in the vertebral bodies combined with low white blood cell count and **anemia** further support a diagnosis related to plasma cell dyscrasias like multiple myeloma [1][2][3]. *Osteoblasts* - Osteoblasts are responsible for **bone formation** and would not be expected to be numerous in this scenario where there is evidence of **bone loss** (lucencies). - Their presence would typically indicate **active bone remodeling**, not consistent with the findings of anemia and low cellularity in the context presented. *Fibroblasts* - Fibroblasts are involved in **connective tissue formation** and repair, and their numbers are not typically indicative of any hematologic disorders. - They do not directly relate to the findings of **anemia** and **bone lesions**, making them unlikely to be predominant in this aspirate. *Giant cells* - Giant cells, often associated with **inflammatory responses** or granulomatous conditions, do not correlate with the clinical picture of myeloma or the findings outlined in the case. - Their presence would suggest a different pathological process, unrelated to the presence of **plasma cells** in bone marrow aspirate [2]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 616-617. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 617-618. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 606-609.

Q: Which of the following Non-Hodgkin's lymphomas was historically classified as intermediate grade in the Working Formulation?

Diffuse, small cleaved cell lymphoma. ***Diffuse, small cleaved cell lymphoma*** - This subtype was classified under the **intermediate-grade** category in the Working Formulation, which was an older classification system for non-Hodgkin lymphomas. - The Working Formulation aimed to group lymphomas based on their **prognostic behavior**, with intermediate grade indicating a moderate clinical course. *Small non-cleaved cell lymphoma* - This lymphoma, now recognized as **Burkitt lymphoma**, was classified as **high-grade** in the Working Formulation due to its aggressive nature and rapid progression [3]. - It is characterized by a very high **proliferative rate** and aggressive clinical course [3]. *Lymphoblastic lymphoma* - This aggressive lymphoma was also classified as **high-grade** in the Working Formulation [2]. - It arises from immature lymphoid precursors and is notorious for its rapid growth and tendency to involve the **bone marrow** and **CNS** [2],[3]. *Large cell immunoblastic lymphoma* - This aggressive subtype was categorized under the **high-grade** category in the Working Formulation. - It is histologically defined by large, immature-appearing immunoblasts and typically has an **unfavorable prognosis** if left untreated [1]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 563-564. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 560-561. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, p. 606.

Q: Which of the following findings is characteristic of megaloblastic anemia?

All of the options. ***All of the above*** - In megaloblastic anemia, various atypical red blood cell characteristics can be observed, including **Cabot rings**, **Howell-Jolly bodies**, and **basophilic stippling** [1]. - These features arise due to ineffective erythropoiesis and increased reticulocyte production, which are hallmark traits of megaloblastic changes [1]. *Cabot ring* - These are **red cell inclusions** that can be seen in conditions associated with **disrupted hemoglobin synthesis** or **abnormal nucleic acid metabolism**, but are not specific to megaloblastic anemia. - More commonly observed in conditions like **lead poisoning** or **myelodysplastic syndromes**. *Howell Jolly bodies* - These are nuclear remnants seen in red blood cells, typically present after **splenectomy** or in cases of **hemolytic anemia**, rather than specifically indicating megaloblastic anemia. - While they can be seen in megaloblastic anemia, they are not definitive; they signify **poor splenic function**. *Basophilic stippling* - Generally associated with **lead poisoning**, **thalassemias**, and certain types of **anemia**, but not exclusively indicative of megaloblastic anemia. - It results from **RNA remnants** in red blood cells and is more frequently noted in other forms of anemia. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 594-595.

Question 1

Which of the following best describes the shape of Birbeck granules?

Accepted Answer

Resembling a tennis racket

Answer

Resembling a hockey stick

Answer

Resembling a bat

Answer

Resembling a ball

Question 2

What do Döhle bodies represent in neutrophils?

Accepted Answer

Presence of dilated endoplasmic reticulum in neutrophils

Answer

Increased mitochondria in neutrophils

Answer

Golgi apparatus proliferation in neutrophils

Answer

Lysosomal activity in neutrophils

Question 3

Which acquired condition is most commonly associated with spherocytes?

Accepted Answer

Autoimmune hemolytic anemia (AIHA)

Answer

Vitamin B12 deficiency anemia

Answer

Aplastic anemia

Answer

None of the options

Question 4

The subtype of Hodgkin's disease which is histogenetically distinct from all the other subtypes is:

Accepted Answer

Lymphocyte predominant

Answer

Nodular sclerosis

Answer

Mixed cellularity

Answer

Lymphocyte depleted

Question 5

BCR-ABL fusion gene is MOST CHARACTERISTICALLY seen in?

Accepted Answer

CML

Answer

AML

Answer

Chronic Lymphocytic Leukemia (CLL)

Answer

Acute Lymphoblastic Leukemia (ALL)

Question 6

A 68-year-old woman was admitted with a history of weakness for two months. On examination, cervical lymph nodes were found enlarged and the spleen was palpable 2 cm below the costal margin. Her hemoglobin was 10.5 g/dL, platelet count 27 × 10^9/L, and total leukocyte count 40 × 10^9/L, which included 80% mature lymphoid cells with coarse clumped chromatin. Bone marrow revealed a nodular lymphoid infiltrate. The peripheral blood lymphoid cells were positive for CD19, CD5, CD20, and CD23, and negative for CD79B and FMC-7. The histopathological examination of the lymph node in this patient will most likely exhibit effacement of lymph node architecture by?

Accepted Answer

A monomorphic lymphoid proliferation with admixed proliferation centers

Answer

A polymorphous population of lymphocytes, plasma cells, eosinophils and scattered large binucleated cells

Answer

A predominantly follicular pattern with variably-sized follicles effacing nodal architecture

Answer

A diffuse proliferation of medium to large lymphoid cells with high mitotic rate

Question 7

The 'hair on end' appearance is characteristically seen in which of the following conditions?

Accepted Answer

Thalassemia major

Answer

Sickle cell anaemia

Answer

Hereditary spherocytosis

Answer

G6PD deficiency

Question 8

A 62-year-old man presents with back pain for 4 months. Laboratory tests show a white blood cell count of 3700/microliter, hemoglobin of 10.3 g/dL, hematocrit of 31.1%, mean corpuscular volume of 85 fL, and a platelet count of 110,000/microliter. His total serum protein is 8.5 g/dL, with an albumin level of 4.1 g/dL. A chest radiograph shows lucencies in the vertebral bodies. A sternal bone marrow aspirate yields a dark red jelly-like material. Which cell type is most likely to be numerous in this aspirate?

Accepted Answer

Plasma cells

Answer

Osteoblasts

Answer

Giant cells

Answer

Fibroblasts

Question 9

Which of the following Non-Hodgkin's lymphomas was historically classified as intermediate grade in the Working Formulation?

Accepted Answer

Diffuse, small cleaved cell lymphoma

Answer

Small non-cleaved cell lymphoma

Answer

Lymphoblastic lymphoma

Answer

Large cell immunoblastic lymphoma

Question 10

Which of the following findings is characteristic of megaloblastic anemia?

Accepted Answer

All of the options

Answer

Macrocytic red blood cells

Answer

Reticulocytopenia

Answer

Hypersegmented neutrophils

Hematopathology — MCQs

Hematopathology — MCQs

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