A rare syndrome originally described as comprising pulmonary valvular stenosis, café-au-lait spots, dull intelligence, and short stature. Later the phenotype has been expanded to include macrocephaly and Lisch' nodules in the majority of cases, and neurofibromatosis in one-third of the affected persons. Later studies indicate that the characteristics of this condition overlap those of neurofibromatosis and the Noonan syndrome (the neurofibromatosis-Noonan syndrome). Inheritance is autosomal dominant.
- G. H. Watson:
Pulmonary stenosis, café-au-lait spots, and dull intelligence.
Archives of Disease in Childhood, London, 1967, 42: 303-307.
- J.E. Allanson, G.H. Watson:
Watson syndrome: Nineteen years on.
Proceedings of the Greenwood Genetic Center, South Carolina, 1987, 6: 173.