0 Unexplained events, behaviour, etc. are ones for which people do not know or understand the reason:
1 lacking a good explanation:
There are few longitudinal studies of patients with medically unexplained symptoms.
The aim of this study was to investigate outcome in frequent attenders in secondary care who present repeatedly with medically unexplained symptoms.
In conclusion, otherwise unexplained hemoptysis should raise the question of pulmonary venous atresia.
Current definitions of medically unexplained symptoms are best seen in the context of systems of medical care.
What is left unexplained is why a certain set of properties is ascribed to one concept and not another set.
These unexplained differences could in fact be interpreted in terms of the dissimilar administrative practices at the municipality level.
Five categories of symptoms (skin and haemorrhagic, respiratory, gastrointestinal, neurological and unexplained) were adopted for the case definition of the surveillance.
Unexplained symbols and notions are as in the main text of the paper.
