Delayed subglottic stenosis (SGS) is an unusual complication. Here, we report a particular case of delayed SGS. A 17-year-old female suffered extensive injuries including severe neck trauma in a car accident, and complained of dyspnea after 30 days. Tracheal stenosis was observed by fiber optic bronchoscopy, but no specific treatment was administered to the patient. While being transferred to a tertiary hospital 3 days later, the patient fell into deep coma due to hypoxia, and died of hypoxic-ischemic encephalopathy and severe pulmonary infection in the intensive care unit (ICU) 58 days later. Postmortem autopsy and pathological investigation revealed tracheal stenosis 3.0 cm below the vocal cords with a diameter of 0.5 cm, which was caused by a cricoid cartilage fracture, fibrous tissue proliferation and inflammatory cell infiltration. We believed that external forces caused the cricoid fracture and mucosal damage, and after a month of fibrous repair, scar tissue formed the stenosis and caused her death. This report describes a rare condition in which slowly progressive intralaryngeal stenosis formation after external neck trauma could cause asphyxial death in a previously asymptomatic adult.

延迟性声门下狭窄 (SGS) 是一种罕见的并发症。在这里，我们报告了一个特殊的 SGS 延迟案例。一名 17 岁女性在车祸中颈部严重外伤，严重受伤，30 天后主诉呼吸困难。通过纤维支气管镜观察到气管狭窄，但没有对患者进行特殊治疗。3天后转入三级医院时，患者因缺氧陷入深度昏迷，58天后死于缺氧缺血性脑病和重症肺部感染。尸检及病理检查示声带下3.0 cm处气管狭窄，直径0.5 cm，系环状软骨骨折、纤维组织增生及炎性细胞浸润所致。我们认为是外力造成环状软骨骨折和粘膜损伤，经过一个月的纤维修复后，瘢痕组织形成狭窄并导致她死亡。这份报告描述了一种罕见的情况，在这种情况下，颈部外伤后缓慢进行性喉内狭窄形成可能导致先前无症状的成年人窒息死亡。