[Psoriatic polyarthritis in childhood. Clinico-nosological study].

The nosological independence of psoriatic arthritis is discussed in the light of the literature. The clinical and laboratory pictures of infantile psoriasis and PCP are described. Three cases of infantile psoriatic polyarthritis are presented and attention is drawn to the difficulty of diagnosing this condition in children. Longitudinal assessment of the possibility of early onset on the part of forms becoming evident during adulthood is envisaged.