A systematic analysis of all the cases of dissecting intramural haematoma o
f the oesophagus (DIHO) reported in the worldwide literature reveals that t
his is essentially a benign condition. Eighty per cent of patients have at
least two of the three typical presenting features of chest pain, haemateme
sis and dysphagia or odynophagia. Forty-nine per cent of cases are associat
ed with sudden pressure changes within the oesophagus (e.g. due to swallowi
ng) or secondary to direct trauma to the oesophagus. A further group appear
s to arise spontaneously and may be associated with underlying abnormal pre
ssure changes within the oesophagus or a bleeding tendency. Awareness of th
e condition prevents the pain being mistakenly attributed to a cardiac caus
e. With conservative management the symptoms usually resolve within 2 weeks
of presentation. The only mortality associated with DIHO is due to operati
ve intervention or where there is another underlying life-threatening condi
tion. (C) 2000 Lippincott Williams & Wilkins.