Chronic hyperextension of proximal interphalangeal (PIP) joint without rheumatoid arthritis (RA) is relatively rare.

We examined the pathophysiology and postoperative outcomes in three fingers of three patients, which were post-traumatic deformity. There were one female and two males, and the age at the surgery was average 43 years (38-50 years). Duration after injury was average 101 months (three-240 months). The affected site was the little finger in all cases. Post-operative follow-up duration was average 34 months (27-48 months). We assessed pre- and post-operative range of motion (ROM) and radiographic findings. In addition, improvement of swan-neck deformity, complications; the Disabilities of the Arm, Shoulder and Hand (DASH) score; and return to work or sports were post-operatively evaluated. Open joint mobilization was performed in all cases, with radial collateral ligament reconstruction in two fingers and volar plate reconstruction in one case using the FDS radial half-slip. We obtained good post-operative outcomes including improvement of ROM and swan-neck deformity, no complication, favorable DASH score in all patients.

We investigated clinical treatment results and changing of fatty degeneration before and after surgery of 19 shoulders that could be followed up for more 1 year after arthroscopic rotator cuff repair for massive rotator cuff tear. They were evaluated that clinical treatment results by JOA score, recurrent tear by Sugaya classification and fatty degeneration by Goutallier's classification. As results, JOA score improved after surgery, while 4 shoulders (21%) had a recurrent tear within 6 months after surgery. Our cases of massive rotator cuff tear had severe fatty degeneration before surgery, but postoperatively, there were a few cases of improvement fatty degeneration.