BACKGROUNDThe mediastinum is the central limited space of the thoracic cavity, which houses a variety of neoplastic and non-neoplastic lesions. Accurate diagnosis is warranted owing to the variable therapeutic and prognostic implications. The aims of this study are to study the frequency and distribution of mediastinal tumours and tumour-like lesions and to study the histomorphological patterns of the various mediastinal lesions.