Pathnologic @pathnologic
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Path Geek - All things #pathology
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Herpes Simplex Virus 
Lymphadenitis 
 • Expanded paracortex 
 • HSV-infected cells are 
present in areas
Herpes Simplex Virus ... DennisOMalleyMD) #Herpes #Simplex ... Lymphadenitis #HSV #Pathology ... Microscopy #Clinical #LymphNode
Here is a lymph node that is lymphoid-depleted, fibrotic, and burned-out, typical of late phase HIV
Lymphadenitis #PatternC #Pathology ... #Microscopy #LymphNode
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
Lymphadenitis #Pathology ... #LymphNode #Clinical
Amiodarone induced thyroid changes

Histopath: Remarkably enlarged follicles, distended with colloid, without 
scalloping, and lined by flattened
Amiodarone induced thyroid ... #Amiodarone #thyroid ... thyrotoxicosis #AIT #Pathology
Hobnail variant of PTC: micropapillary architecture, dense eosinophilic cytoplasm, hobnail cells with apical nuclei, and marked
PTC #Papillary #Thyroid ... #Carcinoma #Pathology
Sarcoid in the Thyroid - Pathology

Not all thyroid granulomas are subacute thyroiditis- this is sarcoidosis! Can
Sarcoid in the Thyroid ... - Pathology Not ... all thyroid granulomas ... Sarcoid #Granuloma #Thyroid ... #Pathology #Microscopy
Signet ring cell histiocytes in lymph node sinuses! This can mimic metastatic adenocarcinoma. Histiocytes have ingested
#Histiocytes #LymphNode ... #Pathology #Clinical
This macrofollicular thyroid tumor is so very bland... but so perfectly invasive! You can really never
macrofollicular thyroid ... macrofollicular #thyroid ... tumor #Invasive #Pathology
Here is a lymph node with florid follicular hyperplasia typical of HIV lymphadenitis (so-called "pattern A",
Lymphadenitis #PatternA #Pathology ... #Microscopy #LymphNode
Oncocytic Variant of Medullary Carcinoma
Don't assume every oncocytic thyroid tumor is a Hurthle cell neoplasm! Nested
every oncocytic thyroid ... Medullary #Carcinoma #Pathology