Hi, Thanks for writing in. A pheochromocytoma is a hormone secreting tumor of the adrenal gland. This is a tumor which secretes chemicals in small amounts which are usually released by the adrenals. However sometimes the adrenal might also become bulky due to a non functional tumor. If you had pheochromocytoma earlier then please get your urinary vvanillylmandelic acid levels checked with other tests for metanephrine or catecholamine to be done to confirm if there is any suspected adrenal tumor. Please note that these are special tests and to be done under recommendation of your doctor. Your blood pressure is also to be monitored over some days to know any abnormally high blood pressure from any suspected functional adrenal tumor. Please do not worry.