Squamoid eccrine ductal carcinoma: a case report

Abstract

Squamoid eccrine ductal carcinoma (SEDC) is a subtype of malignant tumours of skin appendices, showingeccrine and apocrine differentiation. It is a rare tumour and making a histopathological diagnosis is difficult.Our patient was a 79-year-old male, presenting to our hospital with the complaint of a long-term persistentwound in the scalp. An excisional biopsy was performed due to a preliminary diagnosis of a pyogenicgranuloma. However, the patient was diagnosed with squamoid eccrine ductal carcinoma. Although anexcisional biopsy was performed, the tumour was present on the surgical margins. Consequently, the patientunderwent an extended re-excision but the tumour was detected at the surgical margins again. We aimed topresent this case as SEDC is a rare tumour.