Labels:text | screenshot | black and white | black | monochrome | document OCR: t must be If a pituitary tumour is present, treatme ur growth, directed at arresting and reversing tumo ed to Surgical decompression is usually requin structures relieve pressure effects on parapituitary he (such as the optic chiasm or contents of t be shrunkcavernous sinus) when the lesion canno This is the medically (for example, a prolactinoma) er surgery, case with functionless tumours when af rowth of radiotherapy may be used to prevent reg he tumoy