- Bacterial abscess
- Cutaneous anthrax
- Granuloma annulare
- Mycobacterium marinum infection
This patient was diagnosed with Mycobacterium marinum infection, an atypical mycobacterial skin infection often contracted from contaminated fish tanks, swimming pools, and, occasionally, ocean or lake water.
- The typical skin lesion consists of a pustule or nodule and develops on the exposed extremity 2─3 weeks after exposure
- Constitutional symptoms are rare; fever, if present, is typically low-grade
Pearls for Urgent Care Management and Considerations for Transfer
- The disease is usually self-limited, and lesions tend to heal over a period of 1─2 years if left untreated
- Patients with AIDS, organ transplant recipients, and patients on chronic steroids may occasionally develop disseminated infections to the skin, bone marrow, and joints, leading to synovitis and arthritis
Acknowledgment: This case is presented courtesy of VisualDx.