A rare previously unreported cause of flexor tendon
rupture is described. A 66-year-old man presented with a fully extended left middle finger, accompanied by swelling and purulent drainage. Prior to presentation, he had received a
steroid injection for left middle finger
stenosing tenosynovitis and subsequently developed culture-proven
phaeohyphomycosis fungal infection and secondary enterococcal
bacterial infection, requiring
pharmacotherapy and incision, drainage, and
debridement for
abscess formation. Clinical and magnetic resonance imaging findings were consistent with the diagnosis of closed flexor tendon
rupture of the left middle finger. Antifungal and
antibiotic therapy followed by two-stage flexor tendon reconstruction was performed. Six months postoperatively, full passive range of motion was achieved and the proximal interphalangeal and distal interphalangeal joints of the left middle finger actively flexed to 125 degrees and 90 degrees, respectively.