Difference between revisions of "Haw's syndrome"

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Haw's syndrome is a common finding in cats and is defined as an idiopathic (unknown cause) bilateral elevation of the third eyelids. All other aspects of the ophthalmic examination normal. This problem normally resolves in 3-4 weeks without treatment, or may reflect malaise due to other undiagnosed problems such as:
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[[Image:haws01.jpg|thumb|Haw's syndrome in a cat]]
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Haw's syndrome is a common [[ophthalmology|eye disease]] of cats, characterised by bilateral elevation of the third eyelids. Bilateral elevation of third eyelids is seen when a cat wakes from sleep, but if prolonged, may reflect a disease state. All other aspects of the ophthalmic examination are usually normal.  
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Haw's syndrome normally resolves once the underlying disease is corrected. In cats, disease states which can cause Haw's syndrome include:
 
*[[parasites]]
 
*[[parasites]]
*[[cat flu]]
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*[[Cat Flu|cat flu]] or other viral infections (e.g. [[FeLV]], [[FIV]])
*[[Dysautonomia|Dysautonomia (Key-Gaskell syndrome)]]: clinical signs include bilateral elevated third eyelids, dilated nonresponsive pupils, keratoconjunctivitis sicca, dry mucosal surfaces, anorexia, lethargy, regurgitation, megaesophagus, bradycardia, megacolon, distended bladder (see Dysautonomia)  
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*tranquilization - many pre-anaesthetic drugs such as acepromazine cause relaxation of third eyelid muscles resulting in bilateral elevation.  
*Tranquilization: many tranquilizers (e.g., acepromazine) cause bilateral elevation of the third eyelid. Fatigue can cause transient third eyelid elevation, especially in cats prone to [[ectropion]].
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*fatigue - can cause transient third eyelid elevation, especially in cats prone to [[Ectropion uveae|ectropion]].
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*[[Horner's syndrome]]
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*[[Dysautonomia|Dysautonomia (Key-Gaskell syndrome)]]

Latest revision as of 18:10, 29 March 2010

Haw's syndrome in a cat

Haw's syndrome is a common eye disease of cats, characterised by bilateral elevation of the third eyelids. Bilateral elevation of third eyelids is seen when a cat wakes from sleep, but if prolonged, may reflect a disease state. All other aspects of the ophthalmic examination are usually normal.

Haw's syndrome normally resolves once the underlying disease is corrected. In cats, disease states which can cause Haw's syndrome include: