The brain specimen is sliced in the sagittal plane to the right of the falx cerebri, which remains in-situ. The pituitary gland has been completely replaced by a round tumour 4cm in maximum diameter. The tumour cut surface is pale brown and homogenous (except for an area of haemorrhage superiorly, likely caused by surgical trauma). The tumour has resulted in upward displacement of the midbrain. Tumour erosion has destroyed the sphenoid bone; thus, the sella turcica is enlarged (arrow). The optic chiasma is compressed by the tumour. Histologically, this tumour was a chromophobe adenoma arising from the anterior pituitary.