Identical tetramelic monodactyly in two brothers.

Area of Science:

• Genetics and Developmental Biology
• Orthopedics
• Clinical Medicine

Background:

• Tetramelic monodactyly is a rare congenital limb malformation characterized by the absence or underdevelopment of digits.
• Understanding the genetic and developmental underpinnings of limb malformations is crucial for diagnosis and potential interventions.

Observation:

• Two brothers exhibited nearly identical tetramelic monodactyly, specifically affecting the hands and feet.
• The malformation involved the presence of only the fifth fingers and fifth toes, with aplastic and hypoplastic defects in the remaining skeletal elements.
• All observed limb deformities were symmetrical, with no other anomalies in the extremities or systemic dysplasias noted. Both individuals had normal intelligence.

Findings:

• The study documents a rare, symmetrical presentation of tetramelic monodactyly in siblings.
• The findings suggest a potential genetic component or shared environmental factor influencing limb development in this specific malformation.
• The absence of other congenital defects or intellectual impairment in the affected brothers provides a focused clinical picture.

Implications:

• This case report contributes to the understanding of the phenotypic spectrum of tetramelic monodactyly.
• Further research into the genetic etiology of this specific limb malformation pattern is warranted.
• The findings may aid in genetic counseling and the management of families with similar presentations.