The occurrence rate and correlation factors of thumb-in-palm posture in newborns

Adducted thumb as an isolated morphologic finding: an early sonographic sign of impaired neurodevelopment: A STROBE compliant study

Fetal adducted thumbs have been described in association with hydrocephalus and other abnormalities, but in cases without other structural malformations the determination of prognosis and recurrence risk is challenging. The aim of our study is to analyze the characteristics, natural history, and postnatal outcome of such cases.A retrospective study was conducted over a period of 4 years in a tertiary referral center. All fetuses diagnosed as adducted thumbs without other structural malformations comprised the study group. Prenatal sonographic features and neonatal outcome are documented.There were 4 cases of fetal adducted thumbs diagnosed during the study period. No cases demonstrated other structural malformations throughout the gestation. A smaller head was noted in 2 cases during the follow-up, and all cases presented with polyhydramnios on the first or ensuing scans. Three cases died after birth due to swallowing or breathing difficulty, and the surviving 1 showed convulsion and mental retardation.Fetal adducted thumb might be an early and specific sonographic marker of impaired neurodevelopment. Close follow-up and genetic investigation should be performed in these cases. Ultrasound examination plays an important role in the prenatal diagnosis and counseling of cases without detailed prenatal genetic analysis.

Profile of fisting in term newborns

BACKGROUND

Persistence of fisting of hands and cortical thumb is a predictor of abnormalities in development and dysfunction of the central nervous system, though this may be a normal finding in the immediate newborn period.

AIM

To study the profile of fisting in early neonatal period.

METHODS

Five hundred and fifty healthy term neonates were studied. Hand position was examined by a single observer between 24-48h of birth when the baby was awake and quiet. Complete fisting was defined as flexed fingers covering both proximal and distal palmer creases. If only the distal crease was covered, it was defined as incomplete fisting. Thumb position was observed as thumb by the side of the fingers, under the fingers and above the fingers.

RESULTS

Of the total 550 babies, 338 (61.45%) had bilateral, 39 (7.09%) had right sided and 38 (6.91%) had left sided fisting and 135 (24.55%) had open hands. Of the 1100 hands, 669 hands (60.8%) had complete and 84 (7.63%) had incomplete fisting. "Cortical thumb" was found in 57% of fisted hands. There was no significant difference (p>0.05) in fisting according to the sex and weight of the babies.

CONCLUSION

Fisting was a predominant hand posture among the babies (75.45%) but cortical thumb with bilateral fisting was seen in only 30% of babies.