Pathnologic @pathnologic
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Path Geek - All things #pathology
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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 ... #Pathology #Microscopy ... #LymphNode #Clinical
Here are very large, immature myeloblasts with many nucleoli. A distincitve feature of these blasts is
linear red "Auer rod ... #Clinical #Path ... #Blood #Smear #Microscopy ... #Auer #Rods #AuerRods
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 #Clinical
Herpes Simplex Virus 
Lymphadenitis 
 • Expanded paracortex 
 • HSV-infected cells are 
present in areas
• HSV-infected cells ... HSV #Pathology #Microscopy ... #Clinical #LymphNode
Red cell autoagglutination is the process whereby red cells clump together forming aggregates. This is seen
Red cell autoagglutination ... process whereby red cells ... individual’s red blood cells ... #Clinical #Path ... #Blood #Smear #Microscopy
Red cell autoagglutination is the process whereby red cells clump together forming aggregates. This is seen
Red cell autoagglutination ... process whereby red cells ... individual’s red blood cells ... #Clinical #Path ... #Blood #Smear #Microscopy
A 37-year-old woman initially presented with pancytopenia and found to have leukopenia (2.1 × 103/μL) with
occasional Auer rods ... consistent with Auer rods ... #Clinical #Path ... #Blood #Smear #Microscopy ... #Auer #Rods #AuerRods
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A normal peripheral blood smear indicates the appropriate appearance of red blood cells, with a zone
appearance of red blood cells ... #Clinical #Path ... #Microscopy #PeripheralBloodSmear
Paracoccidioides brasiliensis Lymphadenitis: 

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in
fibrosis (A) and well-formed ... seen within giant cells ... Lymphadenitis #Pathology #LymphNode ... #Clinical #Microscopy
Signet ring cell histiocytes in lymph node sinuses! This can mimic metastatic adenocarcinoma. Histiocytes have ingested
Signet ring cell ... #SignetRing #Cell ... #Histiocytes #LymphNode ... #Pathology #Clinical ... #Microscopy