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 5 was a 18-year-old female who first came to our observation at the age of 24 months due to language delay. Her psychomotor development was also delayed. Convergent strabismus was present, with no anomalies at fundoscopy. Mild dysmorphic features were present, including epicanthic folds and hypotelorism. Physical examination revealed that her height was 175 cm (in the 90th percentile). The hypopigmented lesions were widely diffused in the trunk, particularly on the right side. The right upper limb diameter was 4 cm larger than the left side, and the right lower limb diameter was 7 cm larger and 3 cm longer than the left. Also, the right hemiface was involved by the disturbed growth. EEG and brain MRI were unrevealing. Left kyphoscoliosis was recorded with 10 to 15 degree of Cobb scale.