Acute median nerve compression by haemorrhage from acute myelomonocytic leukaemia.

A 61-year-old male receiving treatment for acute myelomonocytic leukaemia (AMML) developed weakness and sensory loss in the thumb, index and middle finger and half of the ring finger of the left hand as a result of a spontaneous haemorrhage into the carpal tunnel and forearm, an unusual cause of median nerve compression. These findings were confirmed by CT scanning and post-mortem examination. This is the first report of spontaneous haemorrhage occurring in a patient with AMML.