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A case of true hermaphrodism in a horse
Parrilla Hernandez, Sonia; de la Rebière de Pouyade, Geoffroy; Grulke, Sigrid et al.
2014In Reproduction in Domestic Animals, 49 (suppl 3), p. 50
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Keywords :
Horse; Mare; Reproduction; Hermaphrodism; Congenital abnormalities; ovotestis
Abstract :
[en] True hermaphroditism in horses, is a complex and poorly under- stood disorder of sexual development characterized by the presence of both male and female gonads as separate organs or in a combined structure called ovotestis. A 3-year-old Spanish nullipa- rous mare with a history of stallion behaviour and an abnormal reproductive exam was presented at the Equine Clinic of the University of Li ege. Externally, a small vulva with an enlarged clitoris was observed. Transrectal ultrasonography showed a thin (<1 cm) uterus, leading to a small heterogeneous structure in the normal place of the left ovary. No structure could be identified in the presumed location of the right ovary. Speculum exam was compatible with a vaginal agenesis, as the cervix opened craniad the urethral meatus. Oestradiol, progesterone and testosterone concen- trations were compatible with a stallion’s endocrinology. Gonads were laparoscopically found in the usual location of the ovaries in both flanks and excised. Histopathology of both gonads showed atrophic testicular tissue with hyperplastic Leydig cells. The left gonad also contained ovarian tissue with some scarce primordial follicles. Clitoral enlargement is the first symptom most commonly identified in animals with true hermaphroditism and can be explained by the production of testosterone by the gonads, however, the aetiology of the vaginal agenesis is unknown. True hermaph- roditism in horses is generally related to 64XX syndrome with or without SRY gene translocation (impending karyotyping analysis). After 5 days the mare was discharged from the clinic, and in absence of testosterone the stallion behaviour disappeared in a couple of months.
Research center :
University de Liège - Veterinary Medicine Faculty - Equine Clinic
Centre Européen du Cheval: LINALUX - Mont-le-Soie
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Parrilla Hernandez, Sonia  ;  Centre Européen du Cheval: LINALUX - Mont-le-Soie > Reproduction
de la Rebière de Pouyade, Geoffroy  ;  Université de Liège - ULiège > Dép. clinique des animaux de compagnie et des équidés (DCA) > Anesthésiologie gén. et pathologie chirurg. des grds animaux
Grulke, Sigrid  ;  Université de Liège - ULiège > Dép. clinique des animaux de compagnie et des équidés (DCA) > Dép. clinique des animaux de compagnie et des équidés (DCA)
Ponthier, Jérôme ;  Université de Liège - ULiège > Dép. clinique des animaux de compagnie et des équidés (DCA) > Anesthésiologie gén. et pathologie chirurg. des grds animaux
Deleuze, Stefan  ;  Université de Liège - ULiège > Dép. clinique des animaux de compagnie et des équidés (DCA) > Obstét. et path. de la reprod. des anim. de comp. et équidés
Language :
English
Title :
A case of true hermaphrodism in a horse
Publication date :
September 2014
Event name :
Congress of the European Society of Domestic Animal Reproduction (ESDAR)
Event organizer :
European Society of Domestic Animal Reproduction (ESDAR)
Event place :
Helsinki, Finland
Event date :
11-13 septembre 2014
Audience :
International
Journal title :
Reproduction in Domestic Animals
ISSN :
0936-6768
eISSN :
1439-0531
Publisher :
Blackwell Publishing, Berlin, Germany
Volume :
49
Issue :
suppl 3
Pages :
50
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
University de Liège - Veterinary Medicine Faculty - Equine Clinic
EquiDir - Centre Européen du cheval - Linalux-Mont le Soie [BE]
Available on ORBi :
since 23 October 2014

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