[Familial occurrence of Peutz-Jeghers syndrome and Crohn disease with manifestation of both diseases in the same patient].

This is the first communication on a coincidental manifestation of Peutz-Jeghers syndrome and Crohn's disease. In the index case polyposis was found at the age of eight and Crohn's disease was diagnosed at the age of 121/2 years. In this family, both the father and the eldest sister of the patient have a Peutz-Jeghers syndrome. The cousin of the mother also has Crohn's disease. The prognosis of a combination of these two diseases can be considered poor. The differentialdiagnosis posed difficulties.