头颈部木村病的临床及MRI特征

The Clinical Characters and MRI Findings of Kimura Disease of Head and Neck

目的探讨头颈部木村病的临床及MRI表现,以提高对本病的认识。方法对11例经手术或活检病理证实的头颈部木村病患者的临床特征及MRI表现进行回顾性分析。结果木村病多发生于中青年男性,好发于头颈部皮下,常累及大涎腺,T_1WI呈等或稍高信号,T_2WI呈高信号,且病灶内常伴流空信号及条索样低信号,增强后明显渐进性强化,多伴有腮腺周围、颌下及颈部淋巴结肿大。病灶周围常见皮肤增厚,皮下脂肪萎缩。结论木村病的MRI表现具有一定特点,结合临床表现和实验室检查,可明显提高术前诊断的准确率。

Objective To investigate the clinical characters and MRI findings of Kimura disease and improve the understanding of this disease. Methods 11 cases of Kimura disease in the head and neck were verified with histopatholgy.Pre-and post-contrast MR images were preformed preoperatively in all patients then the clinical data and MRI findings were reviewed retrospectively. Results The lesions typically involve the subcutaneous soft tissues of the head and neck area in the young adult men. Typical Kimura disease featured subcutaneous lesions,continuously infiltrated the important glands such as salivary glands. Compared with the adjacent muscle,the MR signal intensity of all lesions was iso-to slightly hyperintense on T_1-weighted images and hyperintense on T_2-weighted images. Most of the lesions demonstrated marked enhancement on postcontrast MR images. MR images also showed tubular signal-intensity voids and strand-like hypointensities. The skin near the lesions was usually involved,as thickening of the epidermis and atrophy of the subcutaneous fat. Associated intraparotid lymphadenopathies,or reactive cervical lymphadenopathies were demonstrated in all patients. Conclusion There are some MRI characteristic features of Kimura disease. The accuracy rate can be increased when combined with the laboratory examination and clinical findings before operation.