Pinky single pleat

Introduction There are three pleat lines in the palm of a normal person, a distal transverse pleat line, a proximal transverse pleat line, and a large fish longitudinal pleat line. Sometimes the distal transverse pleat line and the proximal transverse pleat line are connected into a single pleat line across the whole palm, called the simian crease, which is called the traverse hand. However, sometimes the degree of connection is different and can be divided into various variants. In the normal population of China, the incidence of foul lines can reach 3.53%-4.87%. A single pleat of the little finger usually appears on a chromosomal genetic disease. Chromosome genetic diseases include trisomy 21 and trisomy 18.

Cause

Chromosome genetic disease: Trisomy 21, 18 trisomy syndrome.

an examination

Related inspection

chromosome

(1) Trisomy 21 (congenital type): The frequency of finger-shaped lines of the patient is reduced, and the crepe pattern is increased, especially the ratio of the ruler is high, the TFRC is small, the little finger is often a single pleat line, and about half of the patients There is a through-hand, atd <60 °, more than 70% of patients in the ball area of the bow side of the bow.

(2) 18 trisomy syndrome: the proportion of finger bow lines in patients increased, 80% of patients have more than 7 fingers for bow lines (normal only about 1%), so the TFRC value is low, mostly for the hands, about 40% The patient's little finger is a single pleat line.

Differential diagnosis

Differential diagnosis of a single finger pleat:

(1) Trisomy 13: The sputum and bow lines are significantly increased, so the TFRC value is low, and half of the patients have hands crossed. The axis trigeminal movement is about 82% of patients with t", and the lateral arch of the club area is 42%.

(2) Turner syndrome: The patient's TFRC value increased significantly, atd increased, and there was an increase in the amount of the hand, and the big toe had a large bucket shape and a distant view.

(3) Klinefelter syndrome: the bow line increases and the TFRC value decreases.

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