[Short choledochus. Attempted systematization].

It is necessary to clearly characterize: -- The short choledochus which, in fact, is a long cystic duct joining the ampulla of Vater (4 obs.). -- The choledochus with a high implantation, above the end part of the duodenum (4 obs.). -- The choledochus shortened by the retraction of the duodenum, more often than not induced by a distant duodenal ulcer (1 obs.). The long cystic must be removed if possible. The high implanted choledochus, when associated with a duodenal ulcer leads to etiological (-- mutual action of the two diseases --) and practical problems: it seems preferable, in this case, to leave the ulcer and cure it by an indirect operation.