Cutis marmorata telangiectatica congenita: a mimicker of a common disorder.

reticular erythematous patch over her right thigh, which had been present since birth. The lesion did not disappear with warming. Her parents had also noticed a discrepancy in the size of her lower limbs, with relative atrophy of the right thigh. Aside from dermal melanocytosis (patches of hyperpigmentation), cutaneous lesions were absent from other areas of the skin, including the head and neck region. The infant had not been given any medications, had no known allergies and was otherwise well. Her past medical history was unremarkable, aside from a persistent right umbilical vein detected in utero. Her growth and development were normal. There was no family history of vascular malformations. On examination, the infant appeared well and was in no apparent distress. Her head circumference was at the 50th percentile. Results of a neurologic examination were grossly normal. Dermatologic examination revealed a reticular erythematous patch extending from the right inguinal area to the midsection of her right shin (Figure 1). Subtle cutaneous atrophy was noted. The right thigh was smaller in girth than the left. The length of her lower limbs, measured from the anterior superior ileac spine to the medial malleolus, did not differ. The Galeazzi sign (flexing the hips and knees while the patient is supine to reveal a discrepancy in femur length) showed symmetrical knee height. The infant was diagnosed with a congenital vascular malformation known as cutis marmorata telangiectatica congenita.