By opposition to acute post-operative ischaemic enterocolitis, the authors isolate, with the aid of seven cases, the intestinal lesions which spontaneously occur on the small intestines and on the colon and due to an ischaemic mechanism without thrombosis of the mesenteric vessels. After the description of clinical and anatomical features, they point out the main part of the vascular factor in the genesis of the lesions.

Based on two cases, the authors recall the anatomical lesions of the liver occurring at times in women using oral contraceptives: jaundice, benign tumors, vascular lesions; and they emphasize more particularly the vascular lesions and their relation with oral contraceptives.

On the basis of about one hundred and fifty cases, the authors study the effect of oral contraceptives on the gall-bladder. After having showed their results, they discuss the mechanism of the action of oral contraceptives on the gall-bladder, showing their favouring effect on gallstones and pointing out the delay in gall-bladder emptying induced by them.