🔬 Case of the Week 🔬 Can you diagnose this vulvar lesion?

For February's #WhatThePath Wednesday, this scan shows a reaction induced by hormonal stimulation typically characterized by stroma decidualization, hobnail cells, and nuclear enlargement of chorionic tissues. It used to be mistaken for cancer. What am I? #PathTwitter #PathX

Adult male. Arm swelling. Frozen section. #PathX #PathTwitter #BSTPath

A, Epithelioid haemangioendothelioma (EHE) with YAP1–TFE3 accounts for a small subset of EHEs. It is composed of epithelioid cells withbundantEosinophilic cytoplasm, and is typically vasoformative, in contrast to conventional EHE (driven by WWTR1–CAMTA1).

The classics of Yolk sac tumor! #GynPath #PathX #Pathology #Pathresidents #PathTwitter #ovarianmass #Pathpeeps

A case of a triphasic Wilms tumor (nephroblastoma) showing epithelial, blastemal, and stromal components. The epithelial component is poorly-differentiated in this case, consisting of primitive rosette-like structures. WSI: pathlibrary.com/slidebox/?ca…

Nice morphology of solid papillary carcinoma of the breast. SPC is considered invasive if it consists of tumor nodules with an irregular, geographic, or "jigsaw like" pattern and associated desmoplastic reaction. In SPC, myoeps are absent within the fibrovascular cores, but may or may not be present at the periphery. SPC has an indolent clinical course.

The art of grossing. A 69 yo man with gross hematuria.Right 8x4.5cm Kidney Tumor. Final Dx. Conventional Clear Cell Carcinoma, Grade 1 ISUP/OMS. #Pathology #Pathresidents #GUpath #PathTweeter

Breast, 60y #pathology #patologia #pathoutpic #breastpath #breastpathology

Pleomorphic hyalinizing angiectatic tumor, described years ago, is usually indolent; rare progression to high grade sarcoma is known. Smith ME, Fisher C, Weiss SW. Pleomorphic hyalinizing angiectatic tumor of soft parts. A low-grade neoplasm resembling neurilemoma. MID: 8540605

Posterior fossa, 50y #pathology #patologia #neuropath #neuropathology

Intracranial mass in a young patient, which immunostains confirm the diagnosis? #pedipath #neuropath #bonepath #pathology

Femoral mass, 30y #pathology #patologia #bstpath

Sacral mass, 40y #pathology #patologia #pathoutpic #neuropath #neuropathology

Organ? Dx? #PathTwitter #PathX

Ovary, 20y #pathology #patologia #pathoutpic #gynpath #gynpathology

#thursdaythought #pathology #digitalpath #pathart #imageart #pathtwitter #medtwitter

17 years old girl with heavy vaginal bleeding. VE reveals ?cervical polyp. A nice histology of tadpoles swimming in myxoid stroma together with small blue cells consistent with sarcoma botryoides (embryonal rhabdomyosarcoma). #pathology #Sarcoma #ERMS

Retroperitoneum. What is your diagnosis? 🔎 Poll below 🗳️👇 #PathPuzzle 🕵️‍♂️ @UMichPath #Pathology #PathX #PathTwitter

Cervical intradural tumor in 80 year old female? Any guesses ⁦@UMichPath⁩