Which of the following tumors is not commonly known to increase size during in pregnancy ?

Let us have a look at each option one by one Pituitary 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 23/e, p 1140 “Neurofibromas and meningiomas although brain tumors are not specifically related to gestation, meningiomas, angiomas and neurofibromas are thought to grow more rapidly with pregnancy.” COGDT 10/e, p 398 “Lesions of neurofibromatosis may increase in size and in number as a result of pregnancy.” Williams 23/e, p 1191 I did not get any text specifically mentioning the relationship between glioma and pregnancy but by exclusion the answer is Glioma.