<prompt> Peripheral nerve sheath tumours include all except:SchwannomaNeurofibromamalignant peripheral nerve sheath tumor MPNSTSynol sarcoma  <response>: Peripheral nerve sheath tumours are composed of cells that show evidence of Schwann cell differentiation. These include the three common types, schwannoma, neurofibroma, and malignant peripheral nerve sheath tumor MPNST. Synol sarcoma is not a type of peripheral nerve sheath tumours. 