Pathnologic @pathnologic
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Herpes Simplex Virus 
Lymphadenitis 
 • Expanded paracortex 
 • HSV-infected cells are 
present in areas
Herpes Simplex Virus ... Lymphadenitis ... DennisOMalleyMD) #Herpes ... HSV #Pathology #Microscopy ... #Clinical #LymphNode
Here is a lymph node that is lymphoid-depleted, fibrotic, and burned-out, typical of late phase HIV
Here is a lymph ... late phase HIV lymphadenitis ... Pattern C" in HIV Lymphadenitis ... PatternC #Pathology #Microscopy ... #LymphNode #Clinical
SMARCB1-deficient sinonasal carcinoma: high grade tumors with varying proportions of basaloid and plasmacytoid/rhabdoid cells; CK+, SMARCB1
deficient sinonasal carcinoma ... synapto; aggressive clinical ... deficient #sinonasal #Carcinoma ... #Pathology #Microscopy ... #Clinical
Hobnail variant of PTC: micropapillary architecture, dense eosinophilic cytoplasm, hobnail cells with apical nuclei, and marked
PTC #Papillary #Thyroid ... #Carcinoma #Pathology ... #Clinical #Microscopy
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
Paracoccidioides brasiliensis Lymphadenitis ... #brasiliensis #Lymphadenitis ... Pathology #LymphNode #Clinical ... #Microscopy
Oncocytic Variant of Medullary Carcinoma
Don't assume every oncocytic thyroid tumor is a Hurthle cell neoplasm! Nested
Variant of Medullary Carcinoma ... every oncocytic thyroid ... amyloid as seen here ... #Pathology #Microscopy ... #Clinical
This macrofollicular thyroid tumor is so very bland... but so perfectly invasive! You can really never
macrofollicular thyroid ... for follicular carcinoma ... macrofollicular #thyroid ... Invasive #Pathology #Microscopy ... #Clinical
Here are the morphological hallmarks of Rhabdomyosarcoma.

 - Broken arrow sign 

 - tad-pole rhabdomyoblasts
Here are the morphological ... Hallmarks #Pathology #Microscopy ... #Clinical
A morphologic mosaic of NUT carcinoma: monotonous primitive cells, basophilic to clear cytoplasm, abrupt keratinization, prominent
mosaic of NUT carcinoma ... LisaRooperMD #NUT #carcinoma ... #Pathology #Clinical ... #Microscopy #Mosaic
Here is a lymph node with florid follicular hyperplasia typical of HIV lymphadenitis (so-called "pattern A",
Here is a lymph ... typical of HIV lymphadenitis ... Pattern A" in HIV Lymphadenitis ... PatternA #Pathology #Microscopy ... #LymphNode #Clinical