Complications while removing implants are quite common. In rare cases screw shanks must be left in situ. We present a case of a 38-year-old patient who was treated using a palmar locking plate for a distal radius fracture. After implant removal, one of the screw shanks left in situ penetrated the dorsal cortex of the distal radius into the third extensor tendon compartment and led to irritation of the extensor pollicis longus tendon. We report the unexpected complication and analysis of possible errors of this case to avoid this kind of complication.