Wednesday, July 17, 2024

Case of the Week 752

This week's case was generously donated by Brieanna Ray and Dr. Mike Mitchell. The following object was submitted for identification. It was removed from the skin and subcutis of a teenage girl living in the United States with no recent travel. What is the most likely diagnosis?






 

Sunday, July 7, 2024

Case of the Week 751

 This week's case was generously donated by Dr. Karra Jones. A patient presented with intestinal intussusception, and the following was seen on histopathologic examination of the resected bowel. What is your diagnosis?

10x objective:



20x objective:


Saturday, July 6, 2024

Answer to Case 751

 Answer to the Parasite Case of the Week 751: Anisakis species. 

Thanks to all who provided comments on this case! Idzi kicked us off with his comment: "The Y-shaped lateral chords tell me that this is patient has eaten raw (or undercooked) fish! 😉". Florida Fan then elaborated, "The cross sections tell us that this is a nematode. From online publications and Idzi's comment, the very tall musculature and Y-shaped lateral chords favor a diagnosis of anisakiasis."

Here is an annotated image showing some of the key features:

Note the eosinophilic tissue response surrounding the worm. 
Thanks again to Dr. Jones for donating this classic example of anisakiasis in tissue.