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Ulnar longitudinal deficiency  (ULD) is a rare skeletal condition marked by the partial or complete failure of the formation of the ulna. This rare condition is often associated with fixed flexion deformity, radial head subluxation, complex carpal, metacarpal, and digital abnormalities. Most presentations are male-preponderant and right-sided. Different classifications have described ULD. Usually, the condition is not associated with systemic findings; however, detailed physical examination and radiologic evaluations are crucial for assessing and managing affected patients. We report a rare case of ULD in an 11-month-old female infant with congenital absence of the left ulna, four digits, and a postaxial hypoplastic finger., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Velasquez Restrespo et al.)

Congenital limb deformities, with a birth frequency of 0.55 per 1,000, are extremely rare prenatal defects that can present with either partial or complete lack of a limb or a specific portion of a limb. Amelia is a sporadic anomaly that is defined by the complete absence of a limb's skeletal elements, whereas hypomelia is defined by the incomplete development of a limb's skeletal elements. We present the case of a neonate with gross facial deformities in the form of the absence of both external ears and a saddle-shaped nose. The absence of the right lower limb bud was seen. The left lower limb was underdeveloped, noted only up to the thigh region with the hypoplastic distal part of the leg and absent foot. Genitals and the anus were absent. To the best of our knowledge, this case is exceptional in that congenital limb abnormalities are present at birth along with accompanying genital underdevelopment., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2022, Dalvi et al.)

Tibial hemimelia is a relatively rare congenital tibial longitudinal deficiency (approximately 1 per 1 million live births), unilateral or bilateral, with a relatively intact fibula. Hemimelia results from a disruption of the lower limb developmental field during embryogenesis due to slow or even abort of chondrification process, which results in leg length discrepancy. Affected leg commonly appears short and deformed with knee, ankle, and foot involvement. It may present with a variety of associated anomalies. Surgical treatment varies according to the type and degree of deformity, and reconstructive interventions are still limited. Reported cases of tibial hemimelia are very infrequent, especially tibial hemimelia in twins. Usually, the cases were in single embryo or less frequently in one of the monozygotic twins, but no reported cases regarding tibial hemimelia in one of the dizygotic twins as this article reports., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2021, Al-Chalabi et al.)