Primary Muco‐epidermoid Carcinoma Arising in a Parotid Lymph Node

Abstract

A case of well‐differentiated muco‐epidermoid carcinoma in a parotid lymph node is described. This tumour appareitly arose within and was confined to the lymph node. Salivary ductal and acinar inclusions are often found n parotid lymph nodes and these may occasionally give rise to salivary gland tumours, both benign and malignant. The finding of a malignant salivary gland tumour within such a site does not necessarily imply a metastasis from a primary neoplasm elsewhere in the parotid gland.

Incipient Warthin tumor of intraparotid lymph node in a patient with squamous cell carcinoma of the external auditory canal: An incidental finding

“…The inclusions of the salivary gland ducts and acini in the medullary regions of the parotid and occasionally extraparotid lymph nodes may give rise to a variety of both benign and malignant salivary gland tumors. [ 6 ] The predominant hypothesis being that these tumors arise from a proliferation of oncocytic epithelium and lymphoid tissue-derived from entrapped salivary ductal tissue within parotid lymph nodes. [ 13 ] EBV infection, usage of tobacco, and steroid hormone (progesterone) have been implicated in the development of WT.…”

“…Salivary gland tumors have been reported to arise inside the lymph nodes ranging from benign tumors such as Warthin tumor (WT) and pleomorphic adenoma to malignant neoplasms such as acinic cell carcinoma and mucoepidermoid carcinoma. [ 6 ] WT is considered to be the most common salivary gland neoplasm to originate in ectopic salivary tissue. [ 6 ]…”

“…[ 6 ] WT is considered to be the most common salivary gland neoplasm to originate in ectopic salivary tissue. [ 6 ]…”