Pathnologic @pathnologic
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Herpes Simplex Virus 
Lymphadenitis 
 • Expanded paracortex 
 • HSV-infected cells are 
present in areas
Simplex Virus Lymphadenitis ... • HSV-infected cells ... Simplex #Virus #Lymphadenitis ... HSV #Pathology #Microscopy ... #Clinical #LymphNode
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
Paracoccidioides brasiliensis Lymphadenitis ... Head&neck, Lymph Nodes ... seen within giant cells ... #Pathology #LymphNode ... #Clinical #Microscopy
Here is a lymph node that is lymphoid-depleted, fibrotic, and burned-out, typical of late phase HIV
late phase HIV lymphadenitis ... Pattern C" in HIV Lymphadenitis ... seen in lymph nodes ... PatternC #Pathology #Microscopy ... #LymphNode #Clinical
Here is a lymph node with florid follicular hyperplasia typical of HIV lymphadenitis (so-called "pattern A",
typical of HIV lymphadenitis ... Warthin-Finkeldey type giant cells ... Monocytoid B cells ... PatternA #Pathology #Microscopy ... #LymphNode #Clinical
Diffuse Sclerosis Variant—PTC 
 - Rare variant of PTC 
 - Approximately 3% ofall PTC
Numerous psammoma bodies ... PTC #Papillary #Thyroid ... #Cancer #Pathology ... #Clinical #Gross ... #Microscopy
Oncocytic Variant of Medullary Carcinoma
Don't assume every oncocytic thyroid tumor is a Hurthle cell neoplasm! Nested
every oncocytic thyroid ... tumor is a Hurthle cell ... here should raise concern ... Carcinoma #Pathology #Microscopy ... #Clinical