Trigger Finger Anatomy: Tendon, Sheath, and Nodule Explained #3537297 (License: Personal Use)

The image illustrates the pathophysiology of trigger finger (stenosing tenosynovitis), where a fibrous nodule forms on the flexor tendon near the metacarpophalangeal joint. This nodule catches within the constricted tendon sheath during finger flexion/extension, causing snapping, pain, or locking. The transparent rendering allows visualization of deep anatomical relationships in the palm and digits.

Used in orthopedic, rheumatology, or hand therapy educational content; ideal for patient-facing resources explaining diagnosis, symptoms, or surgical options for trigger finger. Matches user intent to understand causes, anatomy, or treatment rationale.