Patient 1 was a 4-year-old male who first came to our observation at the age of 3 years, due to episodes of febrile seizures. The parents and the youngest sister were healthy and did not show cutaneous anomalies. He was born by Caesarean section with a birth weight of 3100 g. Psychomotor development was regular. At his first physical examination, he weighted 17 kg, with a height of 101 cm and a head circumference of 51 cm (all within the 50th percentile). The hypopigmented lesions, in the form of whorls, were localized on the upper side of the right trunk and showed a linear pattern in the right lower limb. Limbs were asymmetrical: the asymmetry involved the right lower limb, which was larger than the left of 1 cm in diameter, and of 0.5 cm in the right upper limb compared with its counterpart, the right lower limb was 1 cm longer than the left. No facial asymmetry was present. Apart from the hemi-body asymmetry, the patient did not show other anomalies. Neither cognitive delay nor spine anomalies were present. The right femoral bone age was 1 year older than the left side. No skin biopsy to check for genetic mosaicism was carried out.
Patient 8, a 25-year-old male, had no family history of cutaneous anomalies. His cutaneous anomalies were localized over the trunk and the limbs, particularly on the right (Figure ). The stature was 181 cm (75th percentile). The right upper limb diameter was 2 cm larger as compared with the left; the right lower limb diameter was 4 cm larger. Lower limb length discrepancy was 5 cm (the right side was longer). There was mild involvement of the right hemiface. Left kyphoscoliosis was present (20 degree of Cobb). The man attended school with good scores. No seizures had been recorded.