RT Journal Article SR Electronic T1 Demographical Profile and Spectrum of Multiple Malignancies in Children and Adults with Neurocutaneous Disorders JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 5453 OP 5457 DO 10.21873/anticanres.12877 VO 38 IS 9 A1 AGATA MARJANSKA A1 AGNIESZKA JATCZAK-GACA A1 AGNIESZKA WOJTKIEWICZ A1 MARIUSZ WYSOCKI A1 JAN STYCZYNSKI YR 2018 UL http://ar.iiarjournals.org/content/38/9/5453.abstract AB Background/Aim: Neurocutaneous disorders, also referred as phacomatoses, are congenital disorders manifesting at different ages with central nervous system and cutaneous abnormalities. Analysis of the demographic and clinical profile of patients with phacomatoses in the context of the incidence and spectrum of malignancy. Materials and Methods: This is a retrospective analysis of 20 years of data in a single-center study in Poland. Results: Phacomatoses were diagnosed in 45.6% (913/2,003) of referred patients, including 61.4% children. The distribution of phacomatoses included: neurofibromatosis type 1 (NF1) in 92.4%, tuberous sclerosis complex (TSC) 3.9%, neurofibromatosis type 2 (NF2) 2.0%, Klippel-Trenaunay syndrome 0.5%, Von Hippel-Lindau syndrome 0.5%, and other sporadic diseases 0.7%. Non-phacomatosis patients were diagnosed mainly for cafe-au-lait-macules (42.8%). The frequency of malignancy was 9.4% (86/913), including 9.1% in patients with NF1; 27.8% in NF2; and 8.3% in TSC. Multiple malignancies were diagnosed in 0.7% and 7% of all phacomatosis and malignancy-diagnosed patients, respectively. Conclusion: The risk of malignancy in patients with phacomatoses was 21.3-fold higher than in the general population. The risk of secondary malignancy was 7%.