Neurofibromatosis type 1 (NF-1) is an inherited neoplastic syndrome. Adults affected by NF-1 in Poland are mostly unaware of the disease-related risk of cancer. During a year since the Ministry of Health settled a national coordinated medical care program for NF-1 children, 388 NF-1 patients up to 30 years of age were admitted to our Center and 187 had an affected parent (48.1% of familial cases). Only 18 NF-1 parents (9.6%) had any knowledge concerning the risk of malignancy, yet 22 (11.7%) were informed about their primary diagnosis for the first time simultaneously with their child. Asymptomatic tumors were revealed in 3 (1.6%) individuals who underwent preventive ultrasonography recommended during the first visit in the Center: abdominal pheochromocytoma in 2 (a 36-year-old man and a 33-year-old woman) and 1b breast cancer in 1 (a 32-year-old woman) case. Concluding, the early successful prevention of malignancy in professionally counselled NF-1 patients, proven currently, necessitates the urgent extension of prophylaxis and coordinated medical care program to the whole NF-1 population, not only in Poland, but worldwide. Precise knowledge concerning the disease-related medical risks should become a subject of the training of medical professionals regardless of their specialty.