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Salvage with Reverse Total Shoulder Arthroplasty after the Failure of Proximal Humeral Tumor Treatment

근위 상완골 종양 치료 실패 후 역 견관절 전치환물을 이용한 구제술

  • Jeon, Dae-Geun (Department of Orthopedic Surgery, Korea Cancer Center Hospital) ;
  • Cho, Wan Hyeong (Department of Orthopedic Surgery, Korea Cancer Center Hospital) ;
  • Kim, Bum Suk (Department of Orthopedic Surgery, Korea Cancer Center Hospital) ;
  • Park, Hwanseong (Department of Orthopedic Surgery, Korea Cancer Center Hospital)
  • Received : 2017.05.27
  • Accepted : 2018.01.03
  • Published : 2018.12.30

Abstract

Purpose: Many reconstruction methods have been attempted after an en-bloc resection of the proximal humerus. In particular, the introduction of reverse shoulder arthroplasty (RSA) has made a breakthrough in the functional recovery of the shoulder. Nevertheless, RSA has limitations when the humeral bone stock loss is significant. In addition, it is unclear if RSA is effective in patients showing failure with non-operative treatment of a proximal humeral tumor. Materials and Methods: A reconstruction was performed using an overlapping allograft-RSA composite for 11 patients with a failed proximal humeral construct. Delayed RSA was performed on 6 patients with failed non-operative treatment. The pre- and postoperative Musculoskeletal Tumor Society (MSTS) score and the complications were addressed. Results: Overlapping allograft-RSA composite afforded a stable construct in 11 failed proximal humeral reconstructions and the patient's chief complaints were resolved. The mean time to the union of overlapped allograft-host junction was 5.5 months. Average preoperative MSTS score of 20.3 point increased to 25.7 point, postoperatively. Four of the six patients who had RSA within 4 years from the index operation showed arm elevation of more than $90^{\circ}$ whereas the remaining 5 patients showed some disability. The complications include one case each of dislocation and aseptic infection, which were resolved by changing the polyethylene liner and scar revision, respectively. None of the 6 patients who underwent delayed RSA after the failure of non-operative treatment showed arm elevation more than $90^{\circ}$. Conclusion: An overlapping allograft-RSA composite is a simple and reliable reconstructive modality in patients with massive bone loss. In patients with metastatic cancer necessitating a surgical resection at presentation, early conversion to RSA is recommended to secure functional recovery.

목적: 상완골 근위부 절제 후 다양한 재건술이 시도되었으나 역 견관절 전치환술의 도입으로 기능적 결과의 향상이 있었다. 그러나 광범위한 골결손을 동반한 경우에도 이 방법을 적용할 수 있는지와 비수술적 치료 실패 후 지연 재건하면 기능회복의 정도가 어떤지에 대해서는 불확실하다. 대상 및 방법: 상완골 근위부 재건술 후 실패한 11예는 중첩 동종골과 역 견관절 전치환술의 조합술을, 비수술적 치료가 실패한 6예는 지연 역 견관절 전치환술을 시행하였다. 수술 전, 후 기능적 결과를 비교하였으며 합병증을 기술하였다. 결과: 역 견관절 전치환술과 동종골 조합술로 일차 수술이 실패한 11예 전부에서 안정된 재건술이 가능하였으며 수술 전 주 증상도 해소되었다. 골 접합부 평균 골유합 기간은 5.5개월이었다. 수술 전, 후 근골격계 기능 점수는 평균 20.3점에서 25.7점으로 증가하였다. 일차 수술 후 4년 이내에 역 견관절 전치환술로 치환한 6예 중 4예에서 $90^{\circ}$ 이상의 상지 거상이 가능하였으며, 일차 수술 후 4년 이후에 수술한 5예는 견관절의 안정성은 얻었으나 전부 $90^{\circ}$ 이상 거상이 불가능하였다. 합병증은 관절탈구와 무균성 감염이 각각 1예로 폴리에틸렌 교체와 반흔 조직 절제술로 치료하였다. 비수술적 치료 실패로 지연 역 견관절 전치환술을 한 6예에서 기능평가 점수는 향상되었으나 전 예에서 상지의 $90^{\circ}$ 이상 거상은 불가능하였다. 결론: 중첩 동종골과 역 견관절 전치환술의 조합술은 대량의 상완골 골결손이 발생한 환자에서 간단하고 합병증이 적은 골질 회복방법으로 생각된다. 진단 시 근위 상완골 전 절제가 필요한 전이성 골종양 환자는 조기에 역 견관절 전치환술을 하는 것이 기능유지에 도움이 될 것으로 생각된다.

Keywords

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