Rare primary non-neuroendocrine tumours of the sella

About 1% of primary tumour of the sellar region can be diagnostically challenging. The spectrum of these lesions includes lesions that have been codified in 4th edition of the WHO classification of tumours of the pituitary gland published in 2017 such as posterior lobe and neuronal and paraneuronal tumours as well as lesions that have not been included such as the sellar atypical teratoid rhabdoid tumour, salivary gland-like tumours and primary sellar melanocytic tumours. This review aims to provide the diagnostic criteria for these rare lesions and an overview of their essential clinical and neuroimaging features.