Fig. 3: An invasive vulvar squamous cell carcinoma case with EGFR heterogeneous immunoexpression.

a Primary tumor H&E; b lymph node metastasis (synchronous with primary tumor) H&E; c 1st recurrence H&E; d positive EGFR in primary tumor; e negative EGFR in lymph node metastasis; f negative EGFR in 1st recurrence.