Fish tank granuloma: misdiagnosed as cutaneous leishmaniasis.

Mycobacterium marinum is an atypical mycobacterium that causes a skin infection known as fish tank granuloma or swimming pool granuloma affecting people who are exposed to aquatic environments. In general, it is managed medically with antimicrobials and variable treatment protocols. Here, we report a Saudi gentleman who acquired this infection in Thailand and was misdiagnosed as cutaneous leishmaniasis. After establishing the correct diagnosis, treatment with minocycline and trimethoprim-sulfamethoxazole resulted in rapid healing.