Spontaneous intralesional haemorrhage in dysembryoplastic neuroepithelial rumours: a series of five cases

Five patients with dysembryoplastic neuroepithelial tumour (DNT) showing ex tensive secondary haemorrhage, a finding not previously associated with the se neoplasms, are described. The clinical presentations, neuroimaging findi ngs, and histopathological features of these patients are reviewed. One pat ient, a previously asymptomatic 12 year old girl, presented with an acute i ntracerebral haemorrhage into a DNT. A further four young adults with histo ries of intractable partial and generalised seizures dating from childhood showed significant chronic haemorrhages within DNT, the MRI appearances in one patient giving a false impression of a cavernoma. Histopathology disclo sed vascular abnormalities within these tumours which, together with other factors discussed, may have predisposed these tumours to haemorrhage.