RESUMEN
Secondary tumours of the pituitary gland are said to be infrequently found at necropsies and are very rarely recognised clinically. Studies on necropsy material indicate that secondary tumour deposits occur in the pituitary gland in about 1-3%of all patients deceadet by cancer. Breast and lung are by far the most frequent primary sites in women and men, respectively. We report two cases of pituitary metastasis presented as primary pituitary tumour. In the two cases there was headache, impairment of visual acuity and visual field without hypopituitarism. The two patients were operated via a trans-sphenoidal approach. The histopathology made the diagnosis and oriented us to the lung. The bronchoscopy with biopsy confirmed a primary malignancy. Therefore clinicians and pathologists should consider a metastasis lesion in the differential diagnosis of a non-functioning pituitary tumours