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[QUOTE=Blume Farm;7910852]
The blood test referred to above I can only think they are talking about the DNA test that is offered through the OFA registry. It is a test to see who is a carrier and who is most likely to develop the disease. However, there is debate as to how accurate it is to catch all 100% of the DM dogs because there are some dogs that might have developed DM without being positive for the gene. Also, there might be dogs that show to have the gene but die from something else before ever developing DM.
Regarding radiographs; they can be helpful to diagnose IVDD and some neoplastic diseases such as osteosarcoma along the spine. However, many IVDD and neoplasia cases will have normal rads and need MRI to be diagnostic. Veterinary medicine is still in the dark ages diagnostically. In human medicine the MRI and CAT Scan machines are just standard equipment due to the improved imaging they provide. In Vet Med we are like “holy crap, how cool, we have an MRI”!!
I will always remember a case I saw in Vet School to remind myself how limiting rads can be: A relatively nutty woman had this Great Dane that she swore had started to walk a little funny. No one else could see it: not the neurologists, not the orthopedic guys, no one. Took a ton of spinal rads looking for cervical spine disease as that is so common in Great Danes. Rads of entire spine looked normal. Nutty owner lady insisted on a CAT Scan of the dogs entire spine. Low and behold in CAT Scan part of the spine looked like swiss cheese. Lytic holes everywhere. Turns out a foxtail (this was in California) had migrated to the spine and caused discospondylosis! Even the radiologists went back to compare the rads to the CAT Scan images and still the rads looked pretty good. So there you go! Diagnostic information is only as good as what the test is able to show.
edited to add: I have never heard of ultrasound being used to diagnose spinal issues in a small animal…[/QUOTE]
It is not through OFA. I would have to ask one of the neurologists. We had to fill out the forms and our Idexx lab would send it out. I now work in radiology.
DM was only considered after a Neuro exam and there were certain things they noted…breed, any pain, symmetry of the weakness/lameness, and other points of a neuro exam. Radiographs are usually not helpful…although we can occaisionally see a disc on a metal screen prior to MRI. CT or MRI would look for something else that would conclude whether or not the dog has DM. Every once in a while we catch an FCE and usually those dogs are showing improvement by the time of the MRI. Most IVDD or spinal tumor dogs show at least some degree of pain. In an older dog, MRI is preferred over CT because of the ability to see the infarcts, etc. we mostly use the CT for rad onc planning, bullae, nasal, and straight forward Dachshund backs.
The only confirmed cases of DM I have seen have been GSD’s and Corgis.
Sorry to those on here who have lost dogs to DM. It is very sad.