How sharp are your diagnostic skills? Correctly name the diagnosis for the case below to earn a chance to receive a swag bag from Children’s Hospital of Philadelphia. The winner will be randomly selected on May 6 from those submitting the correct answer.
A 28-year-old male was seen in our Comprehensive Vascular Anomalies Program clinic with a history of a congenital birth mark over his right lateral side, gluteal area and upper thigh. He was sent for multidisciplinary evaluation because of episodes of severe pain and cellulitis over the birthmark. These episodes were increasing in frequency and occurring every 4 months. Clinical symptoms included fever, chills, pain, erythema, and firmness over the birthmark. Occasionally he experienced hyperhidrosis, bleeding, and drainage at the site of the birthmark. Symptoms improved with antibiotics and required hospitalization for sepsis on one occasion.
He has been seen at several institutions since birth. His mother reported to him that the lesion was present at birth and “grew with him.” Initially, his mother was told that it was a “birth mark” that would go away and was then told the lesion was a “port wine stain.” A small bunch biopsy was done when he was 13 that revealed a capillary malformation.
The patient reported the lesion getting fuller and thicker over time.
What is the most likely diagnosis?
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