Primary Cutaneous Mucinous Carcinoma: Case Report of a Rare Adnexal Tumour

Primary cutaneous mucinous carcinoma is a rare malignant adnexal tumour of the skin, with the most common location being the periorbital region. Differentiating this tumour from cutaneous metastases and mucinous adenocarcinomas from other sites can be challenging, and due to its rarity, this tumour merits a more detailed study. The authors present a case of a 55-year-old male who presented with a slow-growing tumour located below the right earlobe. The lesion was clinically differentially diagnosed as either a lymph node or a soft tissue mass. An excisional biopsy of the mass revealed features of cutaneous mucinous carcinoma. The patient was clinically assessed, and the possibility of metastasis from other sites was ruled out. Hence, the present case lesion was diagnosed as primary mucinous carcinoma of the skin. The patient is doing well on follow-up, with no history of recurrence or other relevant issues.