[Focal nodular hyperplasia of the liver].

Among the benign liver tumours particularly the focal nodular hyperplasia (FNH) increased its importance. Within 10 years we could observe 28 patients with the lesion. Macroscopically the nodular changes show extremely characteristic findings. The histological picture reminds us of cirrhosis, the prevailing presence in women and the clinical recognition mostly at reproductive age let us think of a hormonal action in development and growth of the lesion. The same concerns the use of hormonal contraceptive drugs. Differential-diagnostically particularly malignant processes are to be demarcated. Though the danger of a haemorrhage with formation of a haemoperitoneum is insignificant, in the individual case a surgical approach should be taken into consideration.