title: Desmoid tumor arising from omohyoid muscle: The first report for unusual complication after transaxillary robotic thyroidectomy.
abstract: BACKGROUND
  Transaxillary robotic (TAR) thyroidectomy has been performed for better aesthetic results by many surgeons. In this report, we describe a rare case of a desmoid tumor developed after TAR thyroidectomy, which is speculated to be a late-term complication.
  
  
  RESULTS
  A 61-year-old woman with a history of papillary microcarcinoma had experienced a large left neck mass that had grown over 2 years. The patient underwent TAR thyroidectomy (right lobectomy and isthmectomy) via the right axilla almost 2.5 years previously. Physical examination revealed a 6-cm, firm mass fixed to the left anterior neck. The mass was fixed to the omohyoid muscle. The 5.9- × 4.7- × 4.5-cm tumor with the surrounding muscles was excised in an en bloc fashion. Pathologic examination confirmed the diagnosis of a desmoid tumor.
  
  
  CONCLUSIONS
  This case suggests that desmoid tumors could develop late after TAR thyroidectomy. Thus, careful observation of the surgical wound may be necessary after TAR thyroidectomy.
authors.affiliation: Department of Otorhinolaryngology - Head and Neck Surgery, Seoul National University Hospital, Seoul, Korea.
authors.forename: Wonjae
authors.initials: W
authors.lastname: Cha
authors.forename: Il Gyu
authors.initials: IG
authors.lastname: Kong
authors.forename: Heejin
authors.initials: H
authors.lastname: Kim
authors.forename: J Hun
authors.initials: JH
authors.lastname: Hah
authors.forename: Myung-Whun
authors.initials: MW
authors.lastname: Sung
mesh_terms: D001707:Biopsy, Needle; D002277:Carcinoma / Q000473:pathology / Q000601:surgery*; D002291:Carcinoma, Papillary; D005260:Female; D018222:Desmoid Tumors / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D010535:Laparoscopy / Q000009:adverse effects / Q000379:methods; D007821:Laryngeal Muscles / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging / Q000379:methods; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D049268:Positron-Emission Tomography / Q000379:methods; D035583:Rare Diseases; D012086:Reoperation / Q000379:methods; D012371:Robotics; D000077273:Thyroid Cancer, Papillary; D013964:Thyroid Neoplasms / Q000473:pathology / Q000601:surgery*; D013965:Thyroidectomy / Q000009:adverse effects* / Q000379:methods; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: aggressive fibromatosis; robotics; thyroid neoplasms; thyroidectomy