<prompt> A pt. has a pituitary tumour and pheochromocytoma and a thyroid nodule. Which Ca is most likely to occur -Follicular CaMedullary CaPapillary CaAnaplastic Ca  <response>: This pt. is suffering from MEN Syndrome.MEN Multiple endocrine neoplasias or MEA Multiple endocrine adenomatosis syndromes are characterized by the familial occurrence of multiple endocrine neoplasms.3 types of MEN Syndrome are recognized.a MEN I or Wermers Syndrome consists of -Pituitary adenoma or hyperplasiaParathyroid adenoma or hyperplasiaPancreatic islet cell hyperplasia, adenoma or carcinoma Other less common manifestations :foregut carcinoidspheochromocytomasubcutaneous or visceral lipomasb MEN HA or Sipple syndromeMedullary carcinoma of thyroid MCTPheochromocytomaParathyroid adenoma or hyperplasiaHirschsprung diseaseCutaneous lichen amyloidosisc MEN H BMedullary carcinoma of thyroid MCTPheochromocytoma Marfanoid featuresMucocutaneous and gastrointestinal neuromasThus this pt. is suffering from MEN II A or II B syndrome Pituitary tumor in this pt. is still confusing the question, but still; answer is definitely MCT. 