Basaloid Tumors: Basal Cell Adenoma and Basal Cell Adenocarcinoma
ثبت نشده
چکیده
Basaloid tumors of the salivary gland are among the most diagnostically challenging areas of salivary gland FNA cytopathology. The primary tumors included in this group are basal cell adenoma, basal cell adenocarcinoma, and the solid variant of adenoid cystic carcinoma. In addition, various other salivary gland tumors, such as cellular pleomorphic adenoma, can also exhibit basaloid features and will be considered as differential diagnostic entities within this section. Basal cell adenomas are rare salivary gland tumors comprised of basaloid cells and lacking the chondromyxoid matrix material characteristic of pleomorphic adenomas. In the past, they have been classified as “monomorphic adenomas,” but this nonspecific terminology is to be avoided in favor of the more specific designation recommended by the WHO “basal cell adenoma.” Basal cell adenomas represent 1%–3% of all salivary gland neoplasms, and they arise primarily in older adults, usually in the sixth to seventh decade. A somewhat histologically similar basaloid tumor that occurs in infants is known as sialoblastoma. Over 75% of basal cell adenomas occur in the parotid gland; they are rarely seen in minor salivary glands. There are 3 subtypes of basal cell adenoma: solid, tubulotrabecular, and membranous. Most patients present with a solitary firm nodule between 1 and 3 cm that is slowly enlarging. Occasionally, basal cell adenomas can be cystic.
منابع مشابه
Basaloid Tumors: Basal Cell Adenoma and Basal Cell Adenocarcinoma
Basaloid tumors of the salivary gland are among the most diagnostically challenging areas of salivary gland FNA cytopathology. The primary tumors included in this group are basal cell adenoma, basal cell adenocarcinoma, and the solid variant of adenoid cystic carcinoma. In addition, various other salivary gland tumors, such as cellular pleomorphic adenoma, can also exhibit basaloid features and...
متن کاملBasaloid Tumors: Basal Cell Adenoma and Basal Cell Adenocarcinoma
Basaloid tumors of the salivary gland are among the most diagnostically challenging areas of salivary gland FNA cytopathology. The primary tumors included in this group are basal cell adenoma, basal cell adenocarcinoma, and the solid variant of adenoid cystic carcinoma. In addition, various other salivary gland tumors, such as cellular pleomorphic adenoma, can also exhibit basaloid features and...
متن کاملBasal Cell Adenoma of the Parotid Gland: A Case Report and Review of the Literature
Salivary gland tumors are among the pathologies in the head and neck that may be challenging in diagnosis and treatment. Most benign tumors occur in the parotid gland. Pleomorphic Adenoma is the most common type. Basal Cell Adenoma is a subtype of the Monomorphic Adenoma with rare occurrence. Proper diagnosis and clinical evaluation by the use of radiography can lead the physician to the best t...
متن کاملBasal cell adenoma of the parotid gland. Case report and review of the literature.
Basal cell adenoma of the salivary glands is an uncommon type of monomorphous adenoma. Its most frequent location is the parotid gland. It usually appears as a firm and mobile slow-growing mass. Histologically, isomorphic cells in nests and interlaced trabecules with a prominent basal membrane are observed. It is also characterized by the presence of a slack and hyaline stroma and the absence o...
متن کاملBasal cell adenocarcinoma of the salivary gland--a case report.
Basal cell adenocarcinoma of the salivary gland is a very rare disease entity as the malignant counterpart of basal cell adenoma. On the basis of morphologic pattern, basal cell adenoma can be divided into four subtypes; trabecular, solid, tubular, and dermal analogue (membranous). We report a case of basal cell adenocarcinoma in the left parotid gland of a 33-year-old woman. Light microscopica...
متن کامل