| Line 5: |
Line 5: |
| | [[Cryptorchidism]] | | [[Cryptorchidism]] |
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| | + | [[Testicular Hypoplasia]] |
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| − | *TESTICULAR HYPOPLASIA
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| − | Maybe spontaneous or associated with intersex or cryptorchidism. Can occur in all species.
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| − | Is confined to descended testicles (cf. cryptorchid testes).
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| − | May be bilateral and/or unilateral.
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| − | Usually detected at or after puberty because of lowered / lack of fertility.
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| − | Development of accessory genitalia is normal, i.e. hormone secretion unimpaired.
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| − | Aetiology:
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| − | #Genetic factors:sex-linked autosomal recessive gene (Swedish Red cattle).
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| − | #Environmental factors:Zn deficiency,ecological/organo-phosphorous compounds?
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| − | #Hormonal factors:endocrine deficiency.
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| − | #Chromosomal abnormalities:XXY Klinefelters syndrome - all species. Male tortoiseshell cats (XXY).
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| − | Gross:small, freely movable in scrotum.
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| − | <br>Histologically:mild (<50% of tubules hypoplastic) to severe, seminiferous tubules small lined by Sertoli cells only. No significant inflammatory reaction
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| − | Information by kind permission of Professor R W Else
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| − | [[Category:Testicles - Developmental Pathology]]
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| − | [[Category:To Do - Reproductive]]
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