Myotubular Myopathy X-Linked (Rottweiler Type)

$75.00 (RRP)



This is a sex-linked inherited muscle disease.  Affected puppies appear normal at birth but they start showing symptoms between 7 and 19 weeks of age. Symptoms include progressive skeletal muscle atrophy, muscle weakness especially in the hind limbs, small stature compared to unaffected littermates, puppies can walk with short choppy strides, collapsing after few strides, difficulty eating due to weakness in mastication muscles, which may lead to dropped jaws, hoarse bark.

The disease progresses rapidly and puppies become unable to stand or raise their heads by 3-4 weeks after the start of the symptoms. Unfortunately affected dogs are usually euthanized between 15-26 weeks of age.

Due to the X Linked recessive mode of inheritance, females are rarely affected affected and the disease is primarily found in males. 


Musculoskeletal - Associated with muscles, bones and associated structures


Myotubularin 1 (MTM1) on Chromosome X

Variant Detected:

Base Substitution c.1151A>C p.Gln384Pro


Moderate. This disease can cause significant signs of discomfort and/or dysfunction in affected animals. It may involve relatively high treatment/management costs, and can sometimes reduce life expectancy.

Mode of Inheritance:

Autosomal Recessive

Research Citation(s):

Shelton, DG. X-linked myotubular myopathy in Rottweiler dogs is caused by a missense mutation in Exon 11 of the MTM1 gene (2015) Skeletal Muscle 5(1):1.

Associated Breed(s):

Mixed Breed, Rottweiler ,