All cases are archived on our website. To view them sorted by number, diagnosis or category, visit our Home Page and click on the Case of the Week button on the left hand side. To subscribe or unsubscribe to the Case of the Week or our other email lists, click here.
Thanks to Dr. Saroona Haroon, The Aga Khan University Hospital (Pakistan), for contributing this case. To contribute a Case of the Week, follow the guidelines on our Case of the Week page.
(1) Don't forget about using our Books pages to review / purchase Pathology related books. Also, please click on one of our Amazon.com links before making ANY Amazon purchase, because Amazon will give us a commission from your purchases, at no cost to you, which helps maintain our website.
(3) We have reconfigured the Home Page search box, so it should now work with Internet Explorer, although we recommend using Firefox, Safari or Chrome as a browser.
(4) We are proud of our record traffic of 21,475 visits on October 9, and over 19,000 visits on every Monday through Thursday in October (to date). Thanks for your support.
(5) We are experimenting with additional advertisements that will help us improve our free online textbook. We do NOT plan to have popup or other obnoxious ads, or to damage the functionality of the website. Let Dr. Pernick know if you have any concerns at NatPernick@hotmail.com.
Case of the Week #289
A 42 year old man presented with a painful nodular forearm mass.
Glomus tumors are immunoreactive for smooth muscle actin (as in this case), type 4 collagen and vimentin. There is variable expression of CD34, h-caldesmon and calponin, and no expression of keratin, desmin, S100 and chromogranin. CD31 highlights the vasculature, but tumor cells are CD31-.