After cutaneous and neurological manifestations, bone and joint involvement are the most common manifestations in Hansen’s disease (HD). Sometimes, these are undiagnosed and rarely reported.

A 68-year-old Filipino, male, presented with an 8-month history of digital joint swelling on both hands. He was initially managed by Rheumatology for arthritis, partially responsive to Methotrexate and Prednisone. Immunology and lupus panel tests were unremarkable. Skin biopsy done on a solitary erythematous plaque on the back revealed granulomatous dermatitis, tuberculoid type. Fite-Faraco, AFB, PAS stains were negative. Four weeks later, he developed multiple erythematous papules and plaques on the face, ears, lower back, gluteal area, and lower extremities. Arthritis was persistent but hypoesthesia, hypohidrosis or alopecia were not reported. A repeat skin biopsy showed epithelioid to macrophagic cell granulomatous reaction compatible to HD. AFB stain and slit skin smear were positive. He was managed as a case of Borderline (BB) to Borderline Lepromatous (BL) leprosy and was started on multibacillary drug treatment (MDT) of Rifampicin, Clofazimine and Dapsone. One month later, the patient reported resolution of skin lesions and arthritis.

Approximately 75% of individuals with HD experience arthritis, which can be one of the early signs of disease. A high index of suspicion is required as it closely mimics other rheumatologic conditions.