A case of polymelia associated with syndactyly in Didelphis aurita (Wied-Neuwied, 1826)

Araujo, H. B.; Costa-Pinto, D.; Castro, Costa; Pires, Jeferson Rocha

doi:10.1590/1519-6984.216641

Braz. J. Biol.

2020

DOI: 10.1590/1519-6984.216641

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A case of polymelia associated with syndactyly in Didelphis aurita (Wied-Neuwied, 1826)

H. B. Araujo

D. Costa-Pinto

Costa Castro³

et al.

Abstract: In January 2018, a young male of Didelphis aurita (Wied-Neuwied, 1826), the Brazilian common opossum, was admitted for veterinary evaluation at the Recovery Clinic of Wild Animals of Estácio de Sá University, CRAS, in Rio de Janeiro, Brazil, due to the presence of a partially duplicated right hind limb. After x-ray evaluation, polymelia associated with syndactyly was diagnosed. The images revealed the following alterations on the right limb: single femur with increased diameter, two tibiae, two fibulae and abs… Show more

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Cited by 5 publications

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“…These kinds of malformations have been reported mainly in humans (Abu-Seida 2014) but have also been described in farm animals (e.g. cows, sheep or pigs), opossums and some amphibians (Araujo et al 2020, Duque-Amado et al 2020, Rousseaux & Ribble 1988, Zielinński 2002). Unlike in other animals, polymelia has not been commonly observed in birds.…”

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First Report of Polymelia in a Passerine Bird, the Pied Flycatcher

Fuertes-Recuero

Longhin

Chiesurin

et al. 2023

Ardea

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Polymelia is a congenital defect characterized by an excessive number of limbs. Leg malformations are unusual and have rarely been reported in birds. The ultimate mechanism that regulates this type of abnormal development is not yet well understood. Here we report polymelia in a nestling of the European Pied Flycatcher Ficedula hypoleuca. We have ringed more than 12,100 Pied Flycatcher nestlings since 1991 and have never observed this malformation before. To our knowledge, there is no study indicating polymelia in any bird of the order Passeriformes. We observed and studied a Pied Flycatcher nestling that had two extra limbs fused at the pelvis. We used X-rays, Computerized Tomography (CT) scan and Magnetic Resonance Imaging (MRI). We describe the observed malformations and discuss potential causes. The malformation could be due to an embryonic cause, such as a parasitic twin (pygopagus parasitic) or a genetic mutation.

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mentioning

confidence: 99%

First Report of Polymelia in a Passerine Bird, the Pied Flycatcher

Fuertes-Recuero

Longhin

Chiesurin

et al. 2023

Ardea

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Congenital Limb Deformities in a Neonatal Crossbred Pig

Rahe

Evrard²,

Holmes³

2022

Case Reports in Veterinary Medicine

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Purpose. To describe the pathology and imaging findings in two neonatal piglets with congenital limb deformities. Methods. The litter from a second parity crossbred sow presented with four mummified fetuses, three stillborn piglets, and two live piglets with notable limb deformities that were unable to effectively ambulate. The piglets were euthanized and submitted for gross and histological evaluation. Results. Both pigs had bilateral secondary cleft palates, with hypoplasia of the nasal turbinates, and external rotation of the forelimbs. One pig displayed bilateral cryptorchidism, markedly thin and shortened hindlimbs, and syndactyly of both hind feet. Radiographs and gross dissection confirmed the presence of single ossified proximal to distal phalanges of both feet, bilaterally shortened tibias with fibular aplasia, and delayed ossification of tarsal as well as carpal bones. Conclusions. To the author’s knowledge, this is the first reported case of hindlimb meromelia with syndactyly in a pig.

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Surgical correction of polymelia in the perineal region of a 2-day-old indigenous bovine calf: a case report from Bangladesh

2023

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Background Polymelia is an occasional and congenital malformation in bovine calves, characterized by the presence of single or multiple accessory limb(s) at various body regions, which are often called the supernumerary limb(s). One of these defects is known as pygomelia, where the additional limb is attached to the pelvis within the perineal region. This study describes such a case along with surgical management. Case presentation A 2-day-old indigenous bovine female calf of 22.7 kg BW was presented with an additional and non-functional fifth limb at the perineal region. The ectopic fifth limb was smaller in size than the other four normal limbs and was in a flexible hanging position. Other than this, the animal was apparently normal with a short and contracted tail. Clinical examinations involving the extension and flexion of the abnormal limb revealed no deep bony attachment/articulation with the pelvic girdle or the caudal spine. The curled tail having an S-shaped base indicated the skeletal defects in the caudal spine. Electrosurgery was performed under deep sedation with regional as well as local anesthesia, which exposed that the limb was internally seated into deep gluteal muscle layers with the attachments of fibrous connective tissues and cartilage to its proximal bony head and located partially to the left lateroventral extremity of the perineum without any direct involvement in the bony pelvis. Surgical excision was done to remove the supernumerary limb, and the wound was closed routinely. Postoperatively, the animal was provided with supportive medications for early healing and recovery. After 2 weeks of surgery, the calf completely recovered without any complications. The contracted tail and spine were left unaffected as no initial surgical maneuver was done due to the early age of the calf and would be considered for further long-term treatment options upon the growth and development with age. Conclusions Pygomelia of bovine calves is one of the rare congenital defects that can be found along with other developmental anomalies. However, this defect can be successfully corrected by surgical approaches following intensive postoperative care and management.

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A case of polymelia associated with syndactyly in Didelphis aurita (Wied-Neuwied, 1826)

Cited by 5 publications

References 9 publications

First Report of Polymelia in a Passerine Bird, the Pied Flycatcher

First Report of Polymelia in a Passerine Bird, the Pied Flycatcher

Congenital Limb Deformities in a Neonatal Crossbred Pig

Surgical correction of polymelia in the perineal region of a 2-day-old indigenous bovine calf: a case report from Bangladesh

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