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Papillary Cystadenoma Lymphomatosum (Warthin's tumour). - This represents about 5-15% of parotid tumours and almost always occurs in the lower portion
of the parotid overlying the angle of the mandible. Infrequently these tumours occur bilaterally or in other salivary glands. It is the only salivary
neoplasm that occurs preponderantly in males above 40 years. This tumour presents as a slow growing painless swelling over the angle of the jaw. The overlying
skin looks normal. The surface of the swelling is smooth and well defined and the margin is distinct. Consistency is soft, often fluctuate, but not translucent.
The regional Hymph nodes are not enlarged. This tumour was previously considered to be teratoid or branchiogenic in origin. But today it is believed that
the tumour is essentially epithelial in origin and that the lymphoid component represents reactive element perhaps of immunologic origin, comparable to
that seen in Hashimoto's thyroditis or Sjogren's syndrome. This tumour is composed of cystic or glandular spaces lined by columnar epithelium within an
abundant lymphoid tissue, harbouring germinal centres. The cells are eosinophilic. Though this tumour may be firm, yet it may be soft and frequently cystic.
Irregular papillary processes of tall columnar epithelium project into the cystic spaces. This tumour is more often seen in white races and not seen in
Negroes. These are encapsulated lesions and do not undergo malignant tranformation. However they are susceptible to infection and may sometimes be converted
of the parotid overlying the angle of the mandible. Infrequently these tumours occur bilaterally or in other salivary glands. It is the only salivary
neoplasm that occurs preponderantly in males above 40 years. This tumour presents as a slow growing painless swelling over the angle of the jaw. The overlying
skin looks normal. The surface of the swelling is smooth and well defined and the margin is distinct. Consistency is soft, often fluctuate, but not translucent.
The regional Hymph nodes are not enlarged. This tumour was previously considered to be teratoid or branchiogenic in origin. But today it is believed that
the tumour is essentially epithelial in origin and that the lymphoid component represents reactive element perhaps of immunologic origin, comparable to
that seen in Hashimoto's thyroditis or Sjogren's syndrome. This tumour is composed of cystic or glandular spaces lined by columnar epithelium within an
abundant lymphoid tissue, harbouring germinal centres. The cells are eosinophilic. Though this tumour may be firm, yet it may be soft and frequently cystic.
Irregular papillary processes of tall columnar epithelium project into the cystic spaces. This tumour is more often seen in white races and not seen in
Negroes. These are encapsulated lesions and do not undergo malignant tranformation. However they are susceptible to infection and may sometimes be converted
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