Radiotherapy for benign disease; assessing the risk of radiation-induced cancer following exposure to intermediate dose radiation.

Most radiotherapy (RT) involves the use of high doses (>50 Gy) to treat malignant disease. However, low to intermediate doses (approximately 3-50 Gy) can provide effective control of a number of benign conditions, ranging from inflammatory/proliferative disorders (e.g.

Heroin-induced leucoencephalopathy misdiagnosed as psychiatric illness.

We present a patient with a background of psychiatric illness who was admitted to hospital with neurological symptoms and signs. Although the organic cause of the neurological disorder was extremely uncommon and hence not readily diagnosed, the signs clearly did not accord with the preexisting psychiatric diagnoses. Nevertheless, several clinicians attributed the cause of the disorder to mental illness, or drug side-effects.