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67 Cards in this Set

  • Front
  • Back
Where in the lymph nodes are B-cells found?
Germinal follicles
Where in the body are T-cells found (2)?
1) Paracortex of lymph nodes
2) Thymus
Where in the body are histiocytes found (2)?
1) Subcapsular sinus of lymph nodes
2) Skin
What is another name for histiocytes?
Langerhans cells
At what age range is lymphadenopathy usually benign? Malignant?
Benign <30 y/o
Malignant >30 y/o
What does painful lymphadenopathy usually indicate (2)?
1) Infection
2) Autoimmune disease
What does painless lymphadenopathy usually indicate (2)?
1) Metastasis
2) Primary malignant lymphoma
White asterisk: what region?
Solid arrow: what region?
Dotted arrow: what region?
White asterisk: germinal follicle
Solid arrow: paracortex
Dotted arrow: subcapsular sinus
Metastasis to left supraclavicular lymph node. From where (2)?
1) Stomach
2) Pancreatic carcinoma
Metastasis to hilar lymph nodes. From where (1)?
1) Lung cancer
Metastasis to para-aortic lymph node. From where (1)?
1) Testicular cancer
Follicular hyperplasia. Histologic appearance?
Prominent germinal follicles
Dermatopathic lymphadenitis such as in psoriasis. Histological appearance.
Melanin pigmentation
Cat-scratch disease. Cause?
Bartonella henselae
Toxoplasmosis. Cause? Clinical features?
Toxoplasma gondii
Mononucleosis-like syndrome with painful cervical lymphadenopathy
Tularemia. Cause? Reservoir? Clinical feature?
Francisella tularensis
Rabbits (zoonosis)
Ulceroglandular lesions
Sinus histiocytosis in axillary lymph nodes of breast cancer patient. Good or bad?
Good
Non-Hodkin's lymphoma. Cell of origin?
B-cell (>80%)
What extranodal sites may non-Hodgkin's lymphoma arise from (3)?
1) Stomach
2) CNS
3) Peyer's patch
Are non-Hodgkin's lymphoma common in children and adults?
Most common malignant lymphoma in adults and children (~60%).
What types of non-Hodgkin's lymphoma may EBV cause (2)?
1) Burkitt's lymphoma
2) CNS lymphoma
What type of non-Hodgkin's lymphoma may H. pylori cause (1)?
Malignant lymphoma of stomach
Which autoimmune disorders are associated with non-Hodgkin lymphoma (2)?
1) Sjogren's syndrome
2) Hashimoto's thyroiditis
Mycosis fungoides. What cell type is involved? What tissue is involved?
CD4 Th cells
Skin
Lymph node section. What pattern is present? Diagnosis?
Starry sky pattern with reactive histiocytes.
Burkitt's lymphoma
Diagnosis?
Follicular lymphoma
Sézary syndrome. What?
Mycosis fungoides in leukemic phase.
Nodular sclerosing Hodgkin Lymphoma. More common in men or women?
Women
What type of Hodgkin Lymphoma is EBV associated with?
Mixed cellularity type.
What is the classic neoplastic cell of Hodgkin Lymphoma? Immunophenotype?
Reed-sternberg cell. CD15+, CD30+
What is required for diagnosis of Hodgkin Lymphoma?
Reed-sternberg cell
What uncommon fever variant is associated with Hodgkin Lymphoma? Characteristics?
Pel-Ebstein fever. Recurring bouts of fever followed by remissions.
What is more important for the prognosis of Hodgkin Lymphoma, stage or type?
Stage
What lymph nodes are involved in nodular sclerosing Hodgkin Lymphoma (2).
1) Mediastinal nodes
2) Either cervical or supraclavicular nodes
What secondary malignancies are patients with Hodgkin Lymphoma at increased risk for?
Acute myelogenous leukemia (AML) or non-Hodgkin lymphoma (NHL)
Diagnosis. (include type)
Mixed-cellularity Hodgkin Lymphoma.
Notes: Reed-Sternberg cells, eosinophils, plasma cells
Diagnosis? (include type)
Nodular-sclerosing Hodgkin's lymphoma
Langerhans histiocytes. Distinguishing immunophenotype? Pathognomonic intracellular structure?
CD1+
Birbeck granules
Malignant histiocytosis. What tissues commonly involved (2)?
1) Skin
2) Lytic bone lesions
Hand-Schuller-Christian disease is a type of malignant histiocytosis. What is the classic triad?
1) Lytic skull lesions
2) Diabetes insipidus
3) Exophthalmos
Eosinophilic granuloma. What? Clinical finding (1)?
Benign histiocytosis
Unifocal lytic lesions in bone
Mast cell disease. Clinical signs and symptoms (3)?
1) Pruritis
2) Swelling
3) Hyperpigmentation
What cell is this? Why?
Histiocyte
Birbeck granules
Urticaria pigmentosum. Clinical findings (2)?
1) Dermatographism
2) Regressed lesions remain hyperpigmented
Histology of Urticaria Pigmentosum?
Mast cells containing metachromatic granules that stain positive with toluidine blue and Giemsa stain.
Plasma cell dyscrasia. Finding on serum protein electrophoresis?
Monoclonal spike, usually IgG.
Bence Jones protein. What?
Light chains (κ or λ) in urine.
Biopsy revealed Giemsa positive cells. Diagnosis?
Urticaria Pigmentosum
What age group does multiple myeloma typically involve?
>40 y/o
What is the typical cellular progression of multiple myeloma?
Normal plasma cell → monoclonal gammopathy of undetermined significance (MGUS) → myeloma
Multiple myeloma. Classical bone findings (3)?
1) Lytic lesions
2) Pathologic fractures
3) Hypercalcemia
Multiple myeloma. Classical renal findings include proteinaceous casts composed of what (2)?
1) Bence Jones protein
2) Intratubular multinucleated giant cell reaction
Multiple myeloma. Common causes of death (2)?
1) Renal failure
2) Sepsis
What is the most common monoclonal glomerulopathy?
MGUS
What cell type is present in the red pulp of the spleen (1)?
Macrophages
What cell types are present in the white pulp of the spleen (2)?
1) B-cells
2) T-cells
What is the most common cause of splenomegaly in developing countries?
Malaria
Gaucher's disease. What is deficient and what is elevated?
↓ glucocerebrosidase
↑ glucocerebroside
Niemann-Pick. What is deficient and what is elevated?
↓ sphingomyelinase
↑ sphingomyelin
Massive splenomegaly. Common complications (4)?
1) LUQ pain
2) Splenic infarctions
3) Friction rub
4) Left-sided pleural effusion
Splenomegaly in cirrhosis. Morphology?
Thickened "sugar-coated" spleen
Hypersplenism. Causes what?
Destruction of hematopoietic cells causing peripheral blood cytopenia.
Splenic dysfunction. Increased risk for what?
Streptococcus pneumoniae sepsis
Mechanisms for septicemia seen in splenic dysfunction (3)?
1) ↓ IgM
2) ↓ tuftsin (increases macrophage phagocytic receptors)
3) ↓ splenic macrophages
This patient presented with proteinaceous tubular casts and lytic bone lesions. What malignant cell types are shown in this slide?
Plasma cells.
This patient presented with splenomegaly. This is a bone marrow biopsy. What is the diagnosis?
Gaucher's disease
Notes: macrophage with fibrillary appearnae of cytoplasm
This patient presented with splenomegaly and a bone marrow biopsy was taken. What is the diagnosis?
Niemann-Pick Disease
Notes: Soap bubble appearance of macrophage cytoplasm.