Pathnologic @pathnologic
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Herpes Simplex Virus 
Lymphadenitis 
 • Expanded paracortex 
 • HSV-infected cells are 
present in areas
Lymphadenitis #HSV #Pathology ... #Microscopy #Clinical ... #LymphNode
Rouleaux formation is common in IgM gammopathy and may be particularly striking

Genevieve Crane, MD, PhD@evemariecrane

#Rouleaux #formation
Rouleaux formation ... #Rouleaux #formation ... gammopathy #MGUS #Clinical ... #Pathology #Hematology
Plasma cell leukemia with extensive rouleaux formation. Aggressive disease & patients typically younger than other forms
extensive rouleaux formation ... leukemia #rouleaux #formation ... #Clinical #Smear ... #Hematology #Pathology
Here is a lymph node with florid follicular hyperplasia typical of HIV lymphadenitis (so-called "pattern A",
cells #HIV #EarlyPhase ... Lymphadenitis #PatternA #Pathology ... #Microscopy #LymphNode ... #Clinical
Here is a lymph node that is lymphoid-depleted, fibrotic, and burned-out, typical of late phase HIV
Lymphadenitis #PatternC #Pathology ... #Microscopy #LymphNode ... #Clinical
Excoriated papules with honey-colored crusting were present on the abdomen, back (Panel A), arms, and legs.
#Clinical #Derm ... #Pathology #Scabies ... #Microscopy #Rash
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
Lymphadenitis #Pathology ... #LymphNode #Clinical
Strongyloides stercoralis Hyperinfection - Physical examination revealed reticulated purpuric patches with dusky centers on the abdomen,
biopsy of the rash ... #Clinical #Derm ... #Pathology #InfectiousDisease ... #Rash #StrongyloidesStercoralis
Tinea Versicolor - Physical examination revealed large, coalescing, hypopigmented patches and macules on her torso and
#Clinical #Derm ... #Pathology #Tinea ... TineaVersicolor #Rash
Signet ring cell histiocytes in lymph node sinuses! This can mimic metastatic adenocarcinoma. Histiocytes have ingested
#Histiocytes #LymphNode ... #Pathology #Clinical