|Classification and external resources|
This Warthin's tumor presented as a parotid mass in a middle-aged male, who underwent superficial parotidectomy. The tumor, at the right of the image, is well-demarcated from the adjacent parotid tissue and tends to shell out from it.
Warthin's tumor or Warthin tumour, also known as papillary cystadenoma lymphomatosum, monomorphic adenoma or adenolymphoma, is benign cystic tumor of the salivary glands containing abundant lymphocytes and germinal centers (lymph node-like stroma). It is named for pathologist Aldred Scott Warthin, who described two cases in 1929.
The gland most likely affected is the parotid gland. In fact, it is the only tumor virtually restricted to the parotid gland. Though much less likely to occur than pleomorphic adenoma, Warthin's tumor is the second most common benign parotid tumor.
Warthin's tumor primarily affects older individuals (age 60–70 years). There is a slight female predilection according to recent studies, but historically it has been associated with a strong male predilection. This change is possibly due to the tumor's association with cigarette smoking and the growing use of cigarettes by women. The tumor is slow growing, painless, and usually appears in the tail of the parotid gland near the angle of the mandible. In 5–14% of cases, Warthin's tumor is bilateral, but the two masses usually are at different times. Warthin's tumor is highly unlikely to become malignant.
The appearance of this tumor under the microscope is unique. There are cystic spaces surrounded by two uniform rows of cells with centrally placed pyknotic nuclei. The cystic spaces have epithelium referred to as papillary infoldings that protrude into them. Additionally, the epithelium has lymphoid stroma with germinal center formation.
Most of these tumors are treated with surgical removal. It is non recurrent .
Intermediate magnification micrograph of a Warthin tumor.
High magnification micrograph of a Warthin tumor showing the characteristic bilayered epithelium.
- Witt, Robert L. (ed.) (2005). "Chapter 9 "Benign tumors, cysts, and tumor-like conditions of the salivary glands". Salivary Gland Diseases: Surgical and Medical Management. New York: Thieme Medical Publishers. p. 123. ISBN 1-58890-414-8.
- Kumar V, Abbas AK, Fausto N (2005). Robbins and Cotran pathologic basis of disease, 7 Ed. St. Louis, MO: Elsevier Saunders. ISBN 0-7216-0187-1.
- Kahn, Michael A. Basic Oral and Maxillofacial Pathology. Volume 1. 2001.
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