23 June 2021: Pathology Images of the Week

Here is a selection of new images from our free, online textbook:

Informatics, digital & computational pathology > Data representation and communication standards

The PNG image has been encoded into JPG using a high quality setting (approximately 329 KB).

Contributed by Chris Williams, M.D.

Uterus > Low grade endometrial stromal sarcoma

Deceptively well circumscribed tumor with a tan-yellow soft cut surface; microscopic evaluation revealed myometrial and lymphovascular invasion.

Contributed by Elizabeth Kertowidjojo, M.D., Ph.D., M.P.H.

Colon > Ulcerative colitis

Active chronic colitis with cryptitis is noted.

Contributed by Rachel Horton, D.O. and Catherine E. Hagen, M.D.

Liver & intrahepatic bile ducts > Histology

Periodic acid-Schiff with diastase (PASD) highlights the basement membrane of bile ducts. It also stains alpha-1 antitrypsin globules in hepatocytes in the setting of alpha-1 antitrypsin deficiency. The lack of globules in this image is a normal finding.

Contributed by Kimberley J. Evason, M.D., Ph.D.

Ovary > Yolk sac tumor

Schiller-Duval body

Contributed by Sharon Song, M.D.