trichodiscoma

例句：

1. 1. The patient had a trichodiscoma on his scalp that was causing him significant discomfort.
   这位病人的头皮上有一个毛发瘤，这给他带来了相当大的不适。
2. 2.The doctor performed a biopsy to remove the trichodiscoma and diagnose the cause of the patient's symptoms.
   医生进行了活检以移除毛发瘤并诊断出患者症状的原因。
3. 3. The patient was advised to avoid touching the area around the trichodiscoma as it could be painful or irritating.
   患者被建议避免触摸毛发瘤周围的区域，因为那里可能会很痛或刺激。