Case of the Week 55
Here’s a challenge for all of you: Nasal polyp removed from a 50 year old Indian man with complaints of chronic nasal obstruction. Histologic exam reveals the following:
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Answer to Case of the Week 54
Answer: Trypomastigotes and intermediate trypomastigote/amastigote forms of Trypanosoma cruzi. Thanks to everyone who wrote in for this case! This was, admittedly, a tricky case, since it is uncommon to see amastigote-type forms in peripheral blood. The reason these atypical forms were present is because this specimen was grown in culture and then innoculated in peripheral [...]
Case of the Week 54
The following were seen on a Giemsa-stained thick blood film made from EDTA whole blood. Identification?
Answer to Case of the Week 53
Answer: You should advise him that this is not an Ixodes scapularis tick, which is the agent of Lyme disease, as well as babesiosis and anaplasmosis. Instead, it is a Dermacentor tick, which can transmit Rocky Mountain spotted fever. Unlike I. scapularis, Dermacentor spp. ticks have a “chalise-shaped” anal groove and festoons (not well visible [...]
Case of the Week 53
Welcome back to Case of the Week! It’s been a while since our last post due to the holiday, but now we’re back on schedule with a fun video for you: The following insect was removed from the flank of a Medical Resident from Minnesota who had mistaken it for a ‘mole’ or ‘skin tag’. [...]
Answer to Case of the Week 52
Question 1. Malaria due to Plasmodium malariae infection. Notice that there is no stippling present, and that the infected red blood cells are the same size or slightly smaller than the neighboring uninfected cells. Also shown here are the ‘classic’ stages of P. malariae in peripheral blood. Question 2. From top to bottom, the forms [...]
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