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Collision tumour of trichofolliculoma and basal cell carcinoma

A 52‐year‐old woman presented with a 2‐year history of a reddish nodule on the right nasolabial sulcus. Histopathological examination revealed that the nodule was composed of trichofolliculoma and basal cell carcinoma. There was no transitional zone between the two neoplasms. The diagnosis was made as a collision tumour of trichofolliculoma and basal cell carcinoma.