Case report describes a novel presentation of mycobacterium haemophilum in an 81-year-old man with myasthenia gravis, highlighting the need for accurate diagnosis of cutaneous infections.
Mycobacterium haemophilum is a slow-growing acid-fast bacillus that causes a broad spectrum of cutaneous lesions among infected patients. It usually presents in those who are immunocompromised. This case report describes an 81-year-old man taking mycophenolate mofetil immunosuppression for myasthenia gravis who was admitted to a Canadian tertiary care center presenting with atraumatic disseminated cutaneous M haemophilum. Diagnosis was delayed because a dermatomal rash distribution and positive mpox polymerase chain reaction invoked alternate diagnoses of possible herpes zoster and mpox. This report highlights a novel presentation of M haemophilum and the importance of timely identification among other possible and emerging cutaneous infections.
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Peters et al. (2025) studied this question.
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