Which of the following parotid gland tumor shows hot spot on tc99 peechnate scan?
adenolymphoma
adenoidcystic ca
acinic cell ca
Adenocarcinoma
Ans. is 'a' ie adenolymphoma (a) scan the salivary glands, especially the parotids; and (b) assess salivary gland function. All salivary tumours produce a `cold' spot on 99mTc (technetium) scan except adenolymphoma (Wahin's tumour) and Oncocytoma. They take up more isotope than the rest of the gland to give a 'hot' spot on scan, so that a definite pre-operative diagnosis can be made without biopsy