Excisional biopsy is recommeded for doubtful primary lesions prior to pathological examination, and when lymph node metastasis is highly suspected, sentinel lymph node biopsy should be initiated.

• 对可疑原发皮损进行病理活检时应首选切除活检，当高度怀疑有淋巴结转移时，可行哨兵淋巴结活检。