Flexor pollicis longus rupture typically presents with an inability to actively flex the interphalangeal joint of the thumb, often accompanied by pain, swelling, or a history of trauma such as a distal radius fracture or laceration. Diagnosis is primarily clinical—demonstrating loss of isolated IP joint flexion—with confirmation by ultrasound or MRI when the extent or location of the tear is uncertain. Treatment usually requires surgical repair or tendon grafting, especially in delayed cases, fo

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