Evaluation of "neocollateral" ligament formation by magnetic resonance imaging after total excision of the proximal interphalangeal collateral ligaments

The Journal of Hand Surgery
R G EatonR Singson

Abstract

The presence of palpable thickening and maintenance of stability within weeks of total excision of the proximal interphalangeal (PIP) joint collateral ligaments is an established, although somewhat mysterious, phenomenon. To further investigate this postoperative thickening, magnetic resonance imaging (MRI) scans were obtained on 10 joints in 9 patients who had undergone total ligament excision for posttraumatic stiff PIP joints 3 months to 14 years earlier. Although the ultrastructure of these newly formed structures is yet unknown, their palpable consistency, MRI contour, distribution, and signal intensity suggest the formation of a new soft tissue structure, albeit scar, which has all the attributes of a collateral ligament. This MRI of a "neocollateral ligament" would help explain the consistent observation of complete joint stability within weeks following total excision of both PIP joint collateral ligaments. All patients from the 14-year span sampled were found to have a similar, consistent, linear low signal density structure crossing the joint margins and essentially identical to that of a normal collateral ligament.

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Citations

May 2, 2007·The Journal of Orthopaedic and Sports Physical Therapy·Peter V LoubertAaron M Mazza
Jul 31, 2013·The Journal of Hand Surgery·Shirzad HoushianMohammad Emami-Moghaddam-Tehrani
Feb 8, 2018·The Journal of Hand Surgery Asian-Pacific Volume·Scott F M DuncanMarianne V Merritt
Nov 22, 2014·Plastic and Reconstructive Surgery·Steven C Haase, Kevin C Chung
Apr 28, 2021·The Journal of Hand Surgery, European Volume·Gopal MalhotraRahul Patil
May 16, 2000·The Journal of Hand Surgery·E Dionysian, R G Eaton

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