良性对称性脂肪过多症头颈部CT分析

目的 分析良性对称性脂肪过多症（BSL）CT表现，评价CT诊断价值。资料与方法 回顾性分析16例经临床证实的BSL患者的CT资料。15例行CT平扫，其中5例同时行CT增强扫描；1例直接行增强扫描。结果 所有患者均表现为颈部脂肪蓄积增厚，无包膜，边界不清，左右对称，蓄积脂肪内无钙化；病变主要分布于颈前舌骨下区（16例），颈前舌骨上区（14例），胸锁乳突肌深面（15例），颈后区皮下（15例），脊柱旁肌肉间隙（11例），上背部皮下（10例），下枕部皮下（9例），斜方肌深面（8例），双侧锁骨上窝（7例）及胸骨切迹（7例），也见于面颊部（4例）、气管前间隙（5例）、颈椎前间隙（3例）及喉旁间隙（1例）。结论 BSL具有特征性头颈部CT表现，CT能清楚显示病变累及范围，在术前定量诊断方面具有重要价值。

CT Analysis of Benign Symmetric Lipomatosis in the Head and Neck Region

Objective To analyze the CT findings of benign symmetric lipomatosis in the head and neck region, and to evaluate the diagnostic value of CT in benign symmetric lipomatosis.Materials and Methods CT findings of 16 cases with benign symmetric lipomatosis in the head and neck region were analyzed retrospectively. 15 cases were performed CT plain scan and enhanced CT scan was performed on 5 of them at the same time, 1 was examined enhanced CT directly.Results Accumulation of nonencapsulated fat in the head and neck region was depicted on CT images in the neck of all patients. The fat deposits were ill defined and symmetrical, no calcification within the lipomatous deposits. The fat deposits were predominantly seen in the anterior part of the neck (infrahyoid in 16 cases and suprahyoid in 14 cases), deep to the stenomastoid muscles (15 cases), in the subcutaneous tissue of the posterior part of the neck (15 cases), between the paraspinal muscles (11 cases), in the subcutaneous tissue of the upper back (10 cases), in the subcutaneous tissue of the lower occipital region (9 cases), deep to the trapezius muscles (8 cases), in the bilateral supraclavicular fossa (7 cases) and sternal notch (7 cases). The fat deposits were also seen over the cheeks (4 cases), in the pretracheal space (5 cases), in the prevertebral space (3 cases) and parapharyngeal fat space (1 case). Conclusion Benign symmetric lipomatosis in the head and neck region have characteristic CT findings, CT can clearly demonstrate the distribution of fat in the head and neck region and has great value in quantitative diagnosis before operation.