ABSTRACT 10,248 schoolchildren in central Okinawa were examined by one observer for remaining Mongolian spots. The spots were found in 783 schoolchildren (7.64%). Sacral Mongolian spots disappeared smoothly, while extrasacral Mongolian spots showed a general tendency toward disappearance. There were interesting but unexplainable differences in the rate of disappearance of Mongolian spots among city dwellers, suburban inhabitants and rural people in the area examined.
No takes yet. Share an insight, caveat, or question.
Ichiro Kikuchi (1980) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: