<prompt> Which of the following tumors is not commonly known to increase size during in pregnancy ?GliomaPituitary adenomaMeningiomaNeurofibroma  <response>: Let us have a look at each option one by onePituitary adenoma option b: Enlargement of both microadenomas and macroadenomas 10 mm is seen during pregnancy, less in case of microadenoma and more in case of macroadenoma.Williams 23e, p 1140Neurofibromas and meningiomas although brain tumors are not specifically related to gestation, meningiomas, angiomas and neurofibromas are thought to grow more rapidly with pregnancy.COGDT 10e, p 398Lesions of neurofibromatosis may increase in size and in number as a result of pregnancy.Williams 23e, p 1191I did not get any text specifically mentioning the relationship between glioma and pregnancy but by exclusion the answer is Glioma. 