**10. Other non-glial neoplasms**

There is currently a limited role of PET in other non-glial brain neoplasms including neuro‐ nal tumours, pineal and pituitary tumours, germ cell tumours and embryonal tumours (PNET, neuroblastoma), although anecdotal evidence, case reports and series exist for some of these tumours.

PET imaging with MET, for example, detected all but one CNS germinoma in a case series of 10 patients [66], and choline uptake correlated with residual intracranial non-seminomatous germ cell tumour in a series of four patients [67].

Pituitary adenomas can appear as hypermetabolic lesions on FDG PET [68, 69], with higher uptake seen in macroadenomas than in microadenomas [69]. Increased DOTATATE uptake has been reported in intracranial metastases of pituitary carcinoma and may be useful in the decision to treat withpeptide receptorradionuclide therapy [70, 71]. METsuccessfullydetected all cases of craniopharyngioma in 10 patients [72].
