Pinky single fold

There are three palm fold lines in a normal person; a distal transverse fold line, a proximal transverse fold line, and a large inter-final longitudinal fold line. Sometimes the distal transverse fold line and the proximal transverse fold line are connected to form a single fold line across the entire palm, called the simian crease, and in our country it is called the through hand. However, sometimes the degree of connection is different, and it can be divided into various variants. The incidence of foul lines in the normal population in China can reach 3.53% -4.87%. Single folds of little fingers usually appear on chromosomal genetic diseases.