Immunohistochemical Analysis in Salivary Duct Carcinoma of the Upper Labial Mucosa: A Rare Case Report

Abstract

Salivary Duct Carcinoma (SDC) is a rare typically high grade, aggressive malignancy arising from the ductal epithelium of salivary glands characterised by ductal formations and central necrosis having pathomorphological resemblance to ductal breast carcinoma. Parotid and submandibular salivary glands are the most commonly affected while very few cases involving the minor salivary glands of the palate, labial mucosa, floor of mouth have been reported. This high grade malignancy must be treated aggressively by complete local excision with radical neck dissection and postoperative radiation therapy seems to offer maximum benefit for the patients. This article highlights a case of a 80-year-old male patient having an intra oral ulcer over a swelling which was since 5 years on the left side of upper lip with left submandibular lymph nodes enlargement is reported. An immunohistochemical analysis of the biopsy specimen was carried out which concluded a SDC. The swelling was surgically excised followed by postoperative radiotherapy and adjuvant chemotherapy. The patient was on a regular follow-up for two and a half years without any local recurrence or distant metastasis.