cutaneous leishmaniasis

Definition: Cutaneous leishmaniasis, caused by Leishmania major, Leishmania mexicana, and Leishmania braziliensis, is a relatively mild, localized disease consisting of a single ulcer on exposed skin.

Images

 Macroscopy / cutaneous lesion

• https://twitter.com/AfgPath/status/762929453051830272
• https://twitter.com/globaldermie/status/741563912336838656
• https://twitter.com/globaldermie/status/866829352230682625

 Microscopy : amastigones within histiocytes; kinetoplast;

• https://twitter.com/CTaraboantaMD/status/807284174809767936
• https://twitter.com/Mjcge/status/859325170988838913
• https://twitter.com/ERDENEROZER/status/949014341952704513

The lesion (often called tropical sore) begins as an itching papule surrounded by induration, changes into a shallow and slowly expanding ulcer with irregular borders, and usually heals by involution within 6 months without treatment.

On microscopic examination, the lesion is granulomatous, usually with many giant cells and few parasites.