Objective To evaluate the CT and pathological features of head and neck pilomatricoma.Methods We retrospectively analyzed the CT findings of 13 patients with head and neck pilomatricoma which were pathologically confirmed.Of them 7 patients received plain CT,2 patients received contrast-enhancement,and 4 patients received plain CT plus contrast-enhancement.Results All the patients presented with solitary tumors,9 of them occurred in the parotid gland region,one in the left occipital,one in the right forehead,one in the right parietal,and another one in the left eyelid.The maximal diameter of the tumors ranged from 0.6 to 2.3 cm with a mean of 1.5 cm.All lesions were well-circumscribed,with partial attachment to the overlying skin.Most of lesions were isodense relative to adjacent skeletal muscle on nonenhanced CT scans,sand-like or nodular calcifications within the masses were showed in 8 cases,and no cystic degeneration was found.On contrast-enhanced imaging,mild to moderate homogenous enhancement was showed in 3 cases,heterogeneous moderate enhancement with patchy nonenhancing necrosis area in one case,marked enhancement in one case,and complete calcification with no enhancement in one case.Conclusion Head and neck pilomatricoma presents with certain characteristics on CT,which are useful in the clinical diagnosis and differential diagnosis.%目的 探讨头颈部钙化上皮瘤的CT特征,并与病理结果相对照.方法 回顾性分析安徽医科大学第一附属医院13例经病理证实的钙化上皮瘤患者的CT表现并复习相关文献,其中7例患者行CT平扫,2例行增强扫描,4例平扫后行增强扫描.结果 13例均单发,发生于腮腺区9例,左枕部、右额部、右顶部、左眼险各1例,病灶位于皮下脂肪间隙或皮肤.肿块最大径0.6～2.3 cm,平均1.5 cm,所有肿块边界清楚,与邻近皮肤关系密切.平扫肿块多以中等软组织密度为主,8例内见砂粒样或结节样钙化,无一例见明显囊变.6例增强者3例为轻中度较均匀强化,1例不均匀中度强化见斑片状无强化的坏死区,1例强化较明显,1例病灶完全钙化无强化.结论 头颈部钙化上皮瘤的CT表现有一定特征,有助于临床诊断与鉴别诊断.
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