Abstract
The purpose of this communication is to report a primary intrasellar germinoma, causing expansion of the pituitary fossa and outlined by air in the suprasellar cistern. The term suprasellar germinoma is now generally used in preference to ectopic pinealoma, atypical teratoma or a teratoid, to describe a rare malignant tumour which is histologically identical to testicular seminoma and ovarian dysgerminoma. Various authors seem to agree that the tumour probably arises from ectopic germ cells that have been misplaced during their migration from the yolk sac to the gonads in embryogenesis (Simson et al., 1968). These tumours occur more frequently in males, 10 to 30 years of age and reach a peak incidence in the later half of the second decade (Rubinstein, 1972). The majority of intracranial germinomas arise in the pineal region and only few may be found above the pituitary gland. These have been classified according to their relation to the hypothalamus into three types (Kageyama and Belsky, 1961). In the fi...
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