• Sarya Swed, Abdulqadir J Nashwan, Hiba Haj Saleh, Yamane Chawa, Alaa Baria, and Aladdin Etr.
• Faculty of Medicine, Aleppo University, Aleppo, Syria.
• Medicine (Baltimore). 2022 Oct 21; 101 (42): e31237e31237.

RationaleTriphalangeal thumb (TPT) is a rare congenital malformation where the thumb has three phalanges instead of two. Syndactyly is a condition in which children are born with fused or webbed fingers. The combination of TPT, Syndactyly, and thumb duplication is extremely rare, especially when these deformities are combined in one hand.Patient ConcernsHand abnormalities and polydactyl have been reported in a 1-year-old boy.DiagnosisA clinical examination reveals two thumb duplications, finger fusion (Syndactyly), and a thumb with three phalanges (TPT). The diagnosis was based on clinical findings and an X-ray image of the hand.InterventionsThe Z-plasty method was used to remove the adhesion between the thumb and forefinger, as well as the removal of the medial and distal phalanx of the thumb's medial tip.OutcomesThe patient was followed for 2 months and found him in good health. To authors' knowledge, we described an unusual case from Syria, considered the first in medical history.Lessons LearnedGeneral and plastic surgeons should be aware about this unusual mix of the three abnormalities. The family history must also be carefully investigated to explore the occurrence of hereditary illnesses.Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

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