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The Yolk Sac of the Equine Placenta. Its Remnant and Potential Problems. J Equine Vet Sci 2020; 96:103322. [PMID: 33349412 DOI: 10.1016/j.jevs.2020.103322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/06/2020] [Accepted: 11/06/2020] [Indexed: 11/20/2022]
Abstract
This review details the current state of knowledge about the equine yolk sac and its remnant (YSR) in the pregnant mare, which, incidentally, is the only animal species known to exhibit large and/or ossified YSR. It also describes the clinical significance of the YSR and details a case of a strangulating YSR that caused fetal death and abortion.
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Weber J, Rudolph N, Freick M. Facets of Clinical Appearance and Aetiology in an Unusual Bovine Amorphus Globosus. Anat Histol Embryol 2017; 46:502-506. [PMID: 28718952 DOI: 10.1111/ahe.12286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 06/12/2017] [Indexed: 01/10/2023]
Abstract
Amorphus globosus is a rare entity, more common in the cow but also reported in mares, buffaloes and goats. In respect of both development and clinical presentation, this abnormity can be evolved very variably. Previously, it has been discussed whether it is a form of twin pregnancy or placental teratoma. This case report deals with morphology and genetic observations in an unusual bovine amorphus globosus exhibiting a rudimentary clitoris and vulva, gut-like structures and rudimentary bones. The amorphus globosus was shown to be dizygotic to the normal male twin using the BovineSNP50 v2 BeadChip and had a genetical female sex. Aspects of aetiology and pathogenesis as well as the possible impact of amorphus globosus in the emergence of freemartinism are discussed.
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Affiliation(s)
- J Weber
- Veterinary Practice Zettlitz, Straße der Jugend 68, 09306, Zettlitz, Germany
| | - N Rudolph
- Saxon State Laboratory of Health and Veterinary Affairs, Dresden, Germany
| | - M Freick
- Veterinary Practice Zettlitz, Straße der Jugend 68, 09306, Zettlitz, Germany
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Wightman P, Cohen EB, Hunter S, Gartrell B. IMAGING DIAGNOSIS--USE OF RADIOGRAPHY AND COMPUTED TOMOGRAPHY IN THE DIAGNOSIS OF A MINERALIZED YOLK SAC IN A BROWN KIWI (APTERYX MANTELLI). Vet Radiol Ultrasound 2014; 56:E40-3. [PMID: 25199884 DOI: 10.1111/vru.12208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 05/20/2014] [Indexed: 11/29/2022] Open
Abstract
A 12-day-old Brown Kiwi (Apteryx mantelli) was presented with anorexia, torticollis, head-tilt, and coelomic distension. Radiographs showed an ill-defined, fat-opaque, coelomic mass displacing viscera craniodorsally. Curvilinear mineral opacities were superimposed over the ventral aspect of the mass. Computed tomography demonstrated the presence of mineral within the periphery of a fat attenuating mass consistent with a retained yolk sac. A deutectomy (yolk sac excision) was performed. Histopathology of the excised tissue confirmed the diagnosis of a retained yolk sac with multifocal mineralization.
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Affiliation(s)
- Paul Wightman
- Veterinary Teaching Hospital, Radiology, Massey University, Palmerston North, 4442, New Zealand
| | - Eli B Cohen
- Veterinary Teaching Hospital, Radiology, Massey University, Palmerston North, 4442, New Zealand
| | - Stuart Hunter
- Veterinary Teaching Hospital, Pathology, Massey University, Palmerston North, 4442, New Zealand
| | - Brett Gartrell
- Wildbase, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
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Binanti D, Livini M, Riccaboni P, Sironi G. A case of umbilical cord teratoma in an aborted foal. J Vet Diagn Invest 2012; 25:173-5. [DOI: 10.1177/1040638712466396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A 16-year-old primiparous mare aborted an apparently normal fetus at 240 days of gestation. A large, oval mass, measuring approximately 20 cm × 30 cm × 20 cm, was detected attached to the umbilical cord of the fetus. On the cut surface, the mass showed multifocal cystic structures, foci of mineralization, and diffuse hemorrhages. Histological examination of the mass revealed haphazardly arranged cartilage, bone, mesenchymal stroma, adipose tissue, vascular structures, smooth muscle, ciliated epithelium, squamous cornifying epithelium, and undifferentiated germ cells with areas of necrosis and mineralization. The mass was diagnosed as an umbilical cord teratoma, which is an extremely rare tumor in human beings and, to the authors’ knowledge, has only described in the veterinary literature on one occasion.
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Affiliation(s)
- Diana Binanti
- Department of Veterinary Science and Public Health, Faculty of Veterinary Medicine, Veterinary University Hospital–Pathology Unit, Università degli Studi di Milano, Lodi, Italy (Binanti, Riccaboni, Sironi)
- private practitioner, Milan, Italy (Livini)
| | - Marco Livini
- Department of Veterinary Science and Public Health, Faculty of Veterinary Medicine, Veterinary University Hospital–Pathology Unit, Università degli Studi di Milano, Lodi, Italy (Binanti, Riccaboni, Sironi)
- private practitioner, Milan, Italy (Livini)
| | - Pietro Riccaboni
- Department of Veterinary Science and Public Health, Faculty of Veterinary Medicine, Veterinary University Hospital–Pathology Unit, Università degli Studi di Milano, Lodi, Italy (Binanti, Riccaboni, Sironi)
- private practitioner, Milan, Italy (Livini)
| | - Giuseppe Sironi
- Department of Veterinary Science and Public Health, Faculty of Veterinary Medicine, Veterinary University Hospital–Pathology Unit, Università degli Studi di Milano, Lodi, Italy (Binanti, Riccaboni, Sironi)
- private practitioner, Milan, Italy (Livini)
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