[Plexiform neurofibroma and basal ganglia anomaly in Watson syndrome].

A 4 year-old boy was referred for diagnostic reevaluation with known pulmonary valve stenosis. Physical examination revealed multiple cafe-au-lait spots, inguinal freckling and on the right side in supraclavicular region a softly, non-painful tumour. The boy showed a mild mental and language retardation. Ultrasound and MRT demonstrated supraclavicular a plexiform neurofibroma and intracranial increased intensity lesions in basal ganglia and mesencephalon. In our patient, we have diagnosed a Watson-Syndrome, the overlap and differences to neurofibromatosis type I is discussed.