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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 ... 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 ... Pathology #Microscopy #LymphNode

Here is a lymph node with florid follicular hyperplasia typical of HIV lymphadenitis (so-called "pattern A",

Here is a lymph ... Pathology #Microscopy #LymphNode

Paracoccidioides brasiliensis Lymphadenitis:

Paracoccidioidomycosis is a systemic fungal infection rare in the US, but endemic in

Lymphadenitis #Pathology #LymphNode

Here are the morphological hallmarks of Rhabdomyosarcoma.

- Broken arrow sign

- tad-pole rhabdomyoblasts

Here are the morphological

Here are very large, immature myeloblasts with many nucleoli. A distincitve feature of these blasts is

Here are very large

Here is another peripheral blood smear demonstrating changes with iron deficiency anemia. Note the increased zone

Here is another

Acute Graft versus Host disease: vacuolar interface dermatitis w/ lymphoexocytosis, dyskeratotic keratinocytes, notable satellite cell necrosis.

after BMT like here

Signet ring cell histiocytes in lymph node sinuses! This can mimic metastatic adenocarcinoma. Histiocytes have ingested

#Histiocytes #LymphNode

Olfactory Neuroblastoma Pathology

Morphology and other IHC clinched the diagnosis of olfactory neuroblastoma here. The tumor had

neuroblastoma here

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