Macular Corneal Dystrophy (Labrador Type)

Test Overview:

MCD is a relatively rare disease which is inherited as an autosomal recessive trait, meaning that both parents must be at least carriers of the disease to produce an affected offspring. The disease is characterized by a diffuse cloudiness of the cornea as well as an abnormally thin cornea in affected animals. Affected dogs will develop cloudy eyes, due to an abnormal accumulation of glycosaminoglycans in their corneas (the equivalent to the windscreen of the eye).


Ophthalmologic - Associated with the eyes and associated structures



Variant Detected:



Low-Moderate. This disease can cause some discomfort and/or dysfunction in the affected animal. It does not generally affect life expectancy.

Mode of Inheritance:

Autosomal Recessive

Research Citation(s):

Vet Ophthalmol. 2019 Jan 30. doi: 10.1111/vop.12596. [Epub ahead of print] Phenotype of macular corneal dystrophy in Labrador Retrievers: A multicenter study. Busse C1, Kafarnik C1, Linn-Pearl R2, Volmer C1, Matiasek K3, Premont JE4, Dulaurent T5, Douet JY6, Gilbert I7, Jalomäki S8, Trost K9, Isard PF5, Boyd R10, Raymond I6. Tetas Pont, R., Downs, L., Pettitt, L., Busse, C., Mellersh, C.S. : A Carbohydrate Sulfotransferase-6 (CHST6) gene mutation is associated with Macular Corneal Dystrophy in Labrador Retrievers. Vet Ophthalmol 19:488-492, 2016. Pubmed reference: 26585178. DOI: 10.1111/vop.12332.

Associated Breed(s):

Australian Labradoodle , Goldendoodle, Labradoodle , Labradoodle Retrodoodle , Labrador Retriever,