Abstract
Observations on 10 less common clinical forms of duodenal ulcer are presented, eight of which include illustrative cases. The dominant feature of these forms is used to designate each type.
The physician may avoid pitfalls in the diagnosis of duodenal ulcer by realizing that atypical forms do occur and that an active ulcer may be the cause of almost any type of dyspepsia or upper abdominal distress or backache, and by obtaining an accurate, detailed history during the first interview, keeping these atypical manifestations in mind.