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ISSN: 2157-7412
Journal of Genetic Syndromes & Gene Therapy
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Bilateral Fibular Dimelia with Mirror Foot: An Additional Case Report

Ebtesam Abdalla* and Israa Alaa-Eddin

Department of Human Genetics, Medical Research Institute, Alexandria University, Egypt

*Corresponding Author:
Ebtesam Abdalla
165 El-Horreya Avenue El- Hadra
Postal code 21561, Alexandria, Egypt
Tel: (+203) 4285455 - 4282373 - 4288233
Fax: (+203) 4283719
E-mail: [email protected]

Received date: February 04, 2016; Accepted date: February 05, 2016; Published date: February 12, 2016

Citation: Abdalla E, Alaa-Eddin I (2016) Bilateral Fibular Dimelia with Mirror Foot: An Additional Case Report. J Genet Syndr Gene Ther 7:i102. doi:10.4172/2157-7412.1000i102

Copyright: © 2016 Abdalla E, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and

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A two-month-old male infant presented with peculiar bilateral lower limb malformations. He was born at term to unrelated healthy Egyptian parents after an uncomplicated pregnancy and delivery. There was no history of drug use, alcohol intake or exposure to teratogenic agents in pregnancy and the family history was also unremarkable.

On examination, the baby manifested striking shortening of lower limbs, especially rhizomelic shortening, with a prominence over left hip [A and B]. Clinically, the knee joints were not palpable and both ankles were fixed in an extreme equinus deformity [A]. The feet were short and very broad with extra digits in a mirror configuration and no identifiable great toes. There was nine and eight toes on his right and left foot, respectively [B and C] Anteroposterior radiographs showed hypoplastic pelvis and femurs [D], while lateral radiographs showed two fibulae in each leg, with bilateral absence of the tibia, patella and knee joint [E]. Lateral radiographs also showed anterior subluxation of the distal ends of the fibulae over the talus [E]. The right foot had eight metatarsals while the left foot had seven [F]. The head circumference was within average for age and the upper limbs were clinically and radiologically normal. General visceral examination, US abdomen and echocardiogram were all free. A clinico-radiological diagnosis of tibial agenesis with fibular duplication and metatarsal diplopodia was made.

Mirror foot is a rare type of foot polydactyly that is characterized by mirror-image duplication around a midline axis on the leg, with absence of an identifiable hallux. Its association with tibial agenesis and fibular dimelia is extremely rare. As of July-2015, eleven cases had been registered worldwide according to the Orphanet Report Series

Mirror foot is a rare type of foot polydactyly that is characterized by mirror-image duplication around a midline axis on the leg, with absence of an identifiable hallux. Its association with tibial agenesis and fibular dimelia is extremely rare. As of July-2015, eleven cases had been registered worldwide according to the Orphanet Report Series (http:// www.orpha.net/orphacom/cahiers/docs/GB/Prevalence_of_rare_ diseases_by_decreasing_prevalence_or_cases.pdf). This limb defect is distinct from polydactyly, where accessory tarsal or metatarsal bones are not seen. Some reports have described the association of this rare defect with congenital heart defects and other congenital anomalies and some have incriminated teratogenic events in its etiology. Mirror foot may be a feature of Laurin-Sandrow syndrome (OMIM 135750), a genetic disease that comprises duplication of ulna and fibula with absence of radius and tibia and polydactyly of hands and feet, frequently in a mirror-like configuration.

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The presented case highlights an extremely rare condition, with bilateral agenesis of the tibia, bilateral duplication of the fibula and mirror foot, not associated with any other congenital anomalies.

Financial Disclosure

The authors indicate they have no financial relationships relevant to this article to disclose.

Competing Interests

The authors declare that they have no competing interests.

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Review summary

  1. Damean Straunt
    Posted on Sep 23 2016 at 3:47 pm
    The case presented in the article is extremely rare and the authors present useful information on bilateral fibular dimelia. The case report is clinically significant and possesses immense application in the diagnosis and treatment of similar cases in future.
 

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