Pathnologic @pathnologic
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Here is a lymph node that is lymphoid-depleted, fibrotic, and burned-out, typical of late phase HIV
KyleBradleyMD "Pattern ... infection) - "Pattern ... phase between pattern ... Lymphadenitis #PatternC ... Pathology #Microscopy #LymphNode
Herpes Simplex Virus 
Lymphadenitis 
 • Expanded paracortex 
 • HSV-infected cells are 
present in areas
Microscopy #Clinical #LymphNode
Here is a lymph node with florid follicular hyperplasia typical of HIV lymphadenitis (so-called "pattern A",
lymphadenitis (so-called "pattern ... KyleBradleyMD "Pattern ... Lymphadenitis #PatternA ... Pathology #Microscopy #LymphNode
SMARCB1-deficient sinonasal carcinoma: high grade tumors with varying proportions of basaloid and plasmacytoid/rhabdoid cells; CK+, SMARCB1
deficient sinonasal carcinoma ... deficient #sinonasal #Carcinoma
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
Lymphadenitis #Pathology #LymphNode
Salivary acinic cell carcinoma is usually an H&E diagnosis for me- but this zymogen-granule poor variant
Salivary acinic cell carcinoma ... characteristic staining pattern ... #Acinic #Cell #Carcinoma
A morphologic mosaic of NUT carcinoma: monotonous primitive cells, basophilic to clear cytoplasm, abrupt keratinization, prominent
mosaic of NUT carcinoma ... LisaRooperMD #NUT #carcinoma
Tinea Versicolor - Physical examination revealed large, coalescing, hypopigmented patches and macules on her torso and
and meatball” pattern
Signet ring cell histiocytes in lymph node sinuses! This can mimic metastatic adenocarcinoma. Histiocytes have ingested
#Histiocytes #LymphNode
Hobnail variant of PTC: micropapillary architecture, dense eosinophilic cytoplasm, hobnail cells with apical nuclei, and marked
Papillary #Thyroid #Carcinoma