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Hobnail variant of PTC: micropapillary architecture, dense eosinophilic cytoplasm, hobnail cells with apical nuclei, and marked
Hobnail variant ... eosinophilic cytoplasm, hobnail ... LisaRooperMD #Hobnail ... PTC #Papillary #Thyroid ... #Carcinoma #Pathology
Pathology - Castleman disease. 

Mediastinal mass in a younger woman.

Histologic Features of Castleman disease, hyaline vascular
Pathology - Castleman ... vessels - Germinal center ... Castleman #disease #Pathology
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
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
Oncocytic Variant of Medullary Carcinoma
Don't assume every oncocytic thyroid tumor is a Hurthle cell neoplasm! Nested
every oncocytic thyroid ... here should raise concern ... Medullary #Carcinoma #Pathology
This macrofollicular thyroid tumor is so very bland... but so perfectly invasive! You can really never
macrofollicular thyroid ... macrofollicular #thyroid ... tumor #Invasive #Pathology
Diffuse Sclerosis Variant—PTC 
 - Rare variant of PTC 
 - Approximately 3% ofall PTC
PTC #Papillary #Thyroid ... #Cancer #Pathology
Focus of Metastatic Melanoma Colonizing a Germinal Center

I thought these big cells were funny immunoblasts- until
Colonizing a Germinal Center ... colonizing a germinal center ... melanoma #germinal #center ... #Pathology #Clinical
Pigmented Macule - A Skin Manifestation of Invasive Breast Cancer - However, a pigmented macule that
Invasive Breast Cancer ... Clinical #Derm #Pathology