8.5 TUMOURS
8.5.1 MIXED
TUMORS
A
common lesion of the salivary gland is the mixed
tumours
(pleomorphic adenoma).
*
Eighty percent of all benign
tumours probably originate from
the myoepeithelial cells of the ducts.
*
Microscopic examination shows a network of strands of spindle
shaped and stellete cells.
*
In one-third of
cases loose myxoid pattern
predominates.
Half, in addition, have pseudocartilaginous structures.
Treatment is
superficial Parotidectomy with
conservation of
branches of the facial nerve.
8.5.2
PAILLARY CYSTADENOMA LYMPHOMATOSUM (WHARTHIN'S TUMOUR)
The lesion feels firm on examination and
represent parotid tissue
sequestered in a lymphnodes. It is the second most common benign
tumour of salivary tisse
The
Histogenesis is unceertain
Treatment is
surgical excision.
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