[Gastrointestinal manifestations in neurofibromatosis].

Gastrointestinal involvement in neurofibromatosis occurs in three major forms: solitary neurogenic tumours, diffuse ganglioneuromatosis and visceral vasculopathy. The entire gastrointestinal tract may be affected. According to the literature, 10-25% of the patients with neurofibromatosis develop intestinal manifestations. However, the recorded incidence is probably too low, since many cases are undiagnosed. Two cases of large plexiform neurofibromas and diffuse ganglioneuromatosis of appendix and intestine are reported.