| A Case of Lateral Neck Desmoid-Type Fibromatosis Misidentified as Malignancy |
Jae Hoon Kim1
, Jin Pyeong Kim2
, Dae Hyun Song3
, Seulki Song2
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1Department of Otorhinolaryngology-Head and Neck Surgery, Gyeongsang National University College of Medicine, Gyeongsang National University Jinju Hospital, Jinju, Korea
2Department of Otorhinolaryngology-Head and Neck Surgery, Gyeongsang National University College of Medicine, Gyeongsang National University Changwon Hospital, Changwon, Korea
3Department of Pathology, Gyeongsang National University College of Medicine, Institute of Medical Science, Gyeongsang National University Changwon Hospital, Jinju, Korea |
| 악성 종양으로 오인된 경부 외측부 데스모이드형 섬유종증 1예 |
| 김재훈1
, 김진평2
, 송대현3
, 송슬기2
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1경상국립대학교 의과대학 이비인후과학교실
2경상국립대학교 의과대학 창원경상국립대학교병원 이비인후과학교실
3경상국립대학교 의과대학 병리학교실, 경상국립대학교 의과학연구원 |
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Received: 9 May 2026; Revised: July 7, 2026 Accepted: 13 July 2026. Published online: 21 October 2026. |
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| ABSTRACT |
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Desmoid-type fibromatosis (DTF) is a rare, locally aggressive fibroblastic neoplasm with a high recurrence rate. We report a rare case of lateral neck DTF in a 37-year-old male. Imaging demonstrated a 7.7-cm mass infiltrating the sternocleidomastoid muscle with lymphadenopathy, mimicking malignancy. Due to an inconclusive biopsy, a wide excision with selective neck dissection was performed. Histopathology confirmed DTF with microscopic positive margins (R1) and nuclear beta-catenin positivity. Nine resected lymph nodes were negative of metastasis. Although initial postoperative imaging was clear, a 6-month follow-up CT identified a suspicious recurrence. Fine-needle aspiration showed no malignancy, and active surveillance was adopted after multidisciplinary discussion. This case highlights the diagnostic challenges of DTF mimicking lateral neck malignancy. It further supports the rationale for concurrent neck dissection when malignancy is suspected and the role of active surveillance following R1 resection in anatomically complex regions. |
| Keywords:
Active surveillanceㆍ Beta-cateninㆍ Desmoid fibromatosisㆍ Lateral neckㆍ R1 resection |
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