Although at times, the epidermoid cyst is difficult to distinguish from a malignant tumor, surgical excision is justified because of its potential for malignancy.

• 乳房的类表皮囊肿是少见的乳房良性疾病，但它有时于临床上不易与恶性肿瘤区分并且确有罕见的潜在恶性变化危险，所以手术切除是合适的治疗方式。