A baby boy was born at term in Nanning, China, with a dark purple mass encircling his entire right calf. It measured 280 millimeters around, ringed by a pale halo of constricted skin, soft and fluctuant to the touch, with bruising underneath. It did not blanch under pressure.
His doctors ran the tests, ruled out the dangerous look-alikes, and then chose the hardest option available in pediatrics. They watched.
