Merkel cell carcinoma of the parotid gland associated with Warthin tumour: report of two cases

Merkel cell carcinoma of the parotid gland associated with Warthin tumour: report of two cases Aims: Two cases of Merkel cell carcinoma occurring simultaneously and in close association with a Warthin tumour of the parotid gland are reported Methods and results: The patients were a 65-year-old man and a 70-year-old man, respectively. The Merkel cell carcinoma component was immunoreactive for chromogranin and keratin 20 and contained neuroendocrine-type granules at the ultrastructural level. Conclusions: The histogenesis of this heretofore undescribed combination is discussed.