01655nas a2200217   4500000000100000008004100001653001200042653002100054653003000075653001700105100001500122700001400137700001500151700001200166245012500178856008200303300001200385490000700397050001800404520101500422       2013                            d10aleprosy10aRenal transplant10aMycobacterium haemophilum10aMasquerading1 aCopeland N1 aFerguson 1 aDenunzio T1 aArora N00aPost-transplant opportunistic infection: Case of Mycobacterium Haemophilum masquerading as leprosy in a renal transplant  uhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3764589/pdf/hjmph7209_S4_0048.pdf  aSuppl 40 v72  aCOPELAND 20133 aImmunosuppression following solid organ transplantation (SOT) predisposes patients to the development of opportunistic infections that manifest in many ways including cutaneous infection. Skin lesions in immunosuppressed patients have a broad differential including both infectious and non-infectious etiologies. Skin infections by mycobacteria are relatively rare and most are due to nontuberculous mycobacterium (NTM). One such NTM, Mycobacterium haemophilum, is generally reported in opportunistic skin infections often associated with water exposure. Very rarely, M. leprae also has been reported as a cause of opportunistic skin infections in SOT recipients. Both pathogens may be difficult to distinguish both clinically and pathologically, but culture can distinguish between the two because M. haemophilum will grow and M. leprae will not. We present a case of M. haemophilum cutaneous infection in a renal transplant recipient that was initially felt to be due to M. leprae based on biopsy appearance.