Week 3 path RR Flashcards
Neoplastic proliferation of small B cells (CD20+) that expands the mantle zone
MANTLE CELL LYMPHOMA
Neoplastic proliferation of mature CD4+ t-cells that infiltrate the skin
Mycosis Fungoides and Sezary Syndrome
NUCLEOLI difficult to see due to dense chromatin
Acute lymphocytic leukemia
Neoplastic proliferation of mature myeloid cells, especially platelets
Essential thrombocytosis
PML/RARalpha in-frame fusion of gene coding sequences which results in a functional unregulated retinoic acid receptor
Acute promyelocytic leukemia (M3)
extramedullary solid tumor of myeloblasts or monoblasts
Myeloid Sarcoma or Chloroma
stain myeloperoxidase, sudan black and non-specific esterase positive
Acute Myeloid Leukemia
presents in teenagers as a mediastinal (thymic) mass
T-ALL
Transforms to DLBCL
CLL/SLL; Follicular Lymphoma
Clinical symptoms are mostly due to hyperviscosity of blood
P. vera
Hairy cell leukemia .s/s
weakness, fatigue, hepatosplenomegaly
SLE spleen: what about the spleen arteries?
onion-skin proliferative thickening of the penicilliary arteries and central arterioles of the white pulp
Pautrier microabscesses
Mycosis Fungoides–>accumulation of neoplastic t-cells (cerebriform-like) in the epidermis
GI shows multifocal submucosa nodules;
mantle cell lymphoma
Notched nuclei on peripheral smear
Mantle Cell Lymphoma–>(“Buttock” cells).
Hypercellular bone marrow in all cell lines but mostly red
Polycythemia vera
associated w/ EBV
Burkitt Lymphoma Diffuse Large B-cell lymphoma
Posterior cervical lymph nodes
toxoplasmosis
SLE spleen bv histopath:
fibrinoid necrosis of the blood vessels
may spread to CNS and TESTES
ALL
endocarditis
can cause acute splenitis
splenic sinusoids are dilated and have thickened walls with increased macrophages
Portal HTN spleen histopath:
Bone marrow: para-trabecular arrangement
Follicular Lymphoma
CLL vs. SLL
CLL: hepatosplenomegaly SLL: generalized lymphadenopathy
high mitotic index; numerous apoptotic bodies; “Starry Sky” appearance.
Burkitt Lymphoma
Marked megakaryocyte increase with bizarre abnormal forms
Essential thrombocytosis
rominent blue-black granulation of the cytoplasm (toxic granulation)
benign neutrophilia
LAP in neutrophilia vs. leukemia
neutrophilia–>Leukocyte alkaline phosphatase (LAP) activity is high.
cytoplasmic projections that is pale blue and agranular w/ rounded or folded nuclei.
Hairy Cell Leukemia
Results in overexpression of Bcl2, which inhibits apoptosis
Follicular Lymphoma
localized skin rashes, plaques and nodules (multiple throughout the body).
Mycosis Fungoides and Sezary Syndrome
Tear drop cells (dacrocyte)
Primary myelofibrosis
Megakaryocytes produce excess platelet-derived growth factor (PDGF) causing marrow fibrosis
Primary myelofibrosis
Gamna-Gandy bodies
fibrotic iron-laden nodules; seen in Portal Hypertension
characteristically arises in epithelial tissues such as stomach, salivary glands, GI tract lungs and the orbit.
Extra nodal Marginal Zone Bcell lymphoma
“Starry Sky” pattern of benign follicles
Follicular Hyperplasia
throbbing/burning sensation of hands and feet–> erythromelalgia
Essential thrombocytosis
Increased risk of venous thrombosis
P. vera
Sao, is low, and EPO is increased.
reactive polycythemia due to high altitude or lung disease
cigarette smoking radiation chemotherapy
AML
CD45+ cells
Hairy cell leukemia
constantly active tyrosine kinase (abl)
Chronic myeloid leukemia
follicular lymphoma vs. follicular hyperplasia
tingible body macrophages are present in follicular hyperplasia; lymphoma is monoclona; hyperplasia is POLYclonal;
Hyperplasia of the deep cortex or paracortex
T-Cell Lymphadenopathy
Proliferation of megakaryoblasts; lack MPO; associated w/ Down Syndrome
M7-Acute megakaryoblastic leukemia (AMegL):
Excess glucocerebrosides
Gaucher disease
cutaneous ulcers of feet (malleoli)
Felty syndrome
lymph nodes that drain acute bacterial infections
Acute suppurative or necrotizing lymphadenitis
T-cell tumor in Southern China and Carribean
Adult T cell lymphoma
Splenic infarcts
wedge-shaped
Negative leukocyte alkaline phosphatase (LAP) stain
CML
wedge shaped red due to hemorrhage
Recent infarcts spleen
strongly reactive for MPO or Sudan Black
M3-AML: Acute Promyelocytic Leukemia
t(9;22) (Philadelphia chromosome) which generates a BCR-ABL fusion protein with increased tyrosine kinase activity
CML
associated with chronic inflamm. conditions such as Sjogren’s Hashimoto thyroiditis H. pylori gastritis
Extranodal Marginal Zone Lymphoma
Adult T cell lymphoma vs Mycoses Fungoides
adult–> hypercalcemia; Mycoses–> pautrier microabscess; cerebriform nuclei; BOTH cause cutaneous lesions;