Intrapelvic migration of Knowles pin through external iliac vein.
Intrapelvic migration of a Knowles pin is rare. A case is reported of Knowles pin migration into the pelvis and through the external iliac vein. This was caused by a combination of excessive motion of the femoral neck nonunion and osteoporosis of the femoral head which allowed forward migration of the pin.
D000368:Aged; D001858:Bone Nails / Q000009:adverse effects*; D005260:Female; D005270:Femur Head; D005547:Foreign Bodies / Q000000981:diagnostic imaging; D005548:Foreign-Body Migration / Q000000981:diagnostic imaging; D006620:Hip Fractures / Q000601:surgery; D006801:Humans; D007084:Iliac Vein; D010388:Pelvis; D011859:Radiography