“Yes, he was born with the little finger,” answers Jenifer, a pretty young woman with a high, bouncy ponytail, in Spanish when asked about the wriggling baby sitting in her lap. His name is Matias. His chubby arms and legs stick out of a onesie decorated with cars and trucks, and his big brown eyes stare, rarely blinking at the doctors and nurses. He turns six months old today, but he’s big enough to pass for 10 or 11 months old.
Jenifer shows Matias’ right hand to the group: growing alongside his thumb is a second thumb, slightly smaller than the first and moving in conjunction with it. She strokes the top of his hand with her thumb as he grips her index finger with his normal thumb and the extra little finger.