“…In the larger series of MF [2,[4][5][6] totalling 338 patients, young adults under 40 years were a rarity, with virtually no patients under 30. Al though scattered case reports of MF in the pediatric age-group have been reported [8,9], the disease in these patients had an ag gressive, rapidly progressive course sug gestive of the acute form of the myelo fibrosis-malignant myelosclerosis syn drome [10]. During a follow-up period of 4-5 years, the clinical course of our pa tients has remained stable (cases 1, 3), or very slowly progressive (case 2).…”