Primary Axillary Porocarcinoma: A Rare Cutaneous Tumour

Abstract

Eccrine porocarcinoma, a rare cutaneous malignant tumour accounts for a fraction of sweat gland tumours. This tumour is found to originate from the intraepithelial parts of the sweat glands. It commonly involves the lower extremities in elderly patients and carries an aggressive behaviour. Cutaneous and visceral metastasis can occur and hence prompt treatment is mandatory. Surgical excision is the mainstay of treatment modality. We hereby present a case of eccrine porocarcinoma in a 50-year-old male in the right axillary region presenting as a verrucous lesion.

Keywords: Axilla; Eccrine; Malignant; Verrucous lesion.

[Table/Fig-1]:

5 X 4 cm verrucous lesion- right axilla

[Table/Fig-2]:

FNAC- Malignant cells in discohesive clusters, sheets and singles (H&E, 400X)

[Table/Fig-3]:

Gross- 4 x 3.5 x 2.5 cm verrucous and multinodular lesion

[Table/Fig-4]:

(a) Interconnected epithelial downgrowth of neoplastic basaloid cells (H&E, 100X); (b) Porocarcinomatous cells in nests and insular pattern (H&E, 100X); (c) Pleomorphic polygonal cells with indistinct cell borders having pale cytoplasm and round to oval nuclei with prominent nucleoli (H&E, 400X); (d) Lymph node showing metastatic porocarcinomatous cells (H&E, 400X); (e) Diffuse membrane positivity EMA (400X).