"The term pinealoma was historically used to refer to both pineal parenchymal tumours and germinomas, which are the two most common categories of primary pineal region tumours 6. Germinomas were sometimes called the "two-cell" pattern type of pinealoma, due to the presence of both lymphocytes and neoplastic germ cells that were reminiscent of teratomas 6. The term pinealoma has since fallen in popularity."