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H427 MTM


Myotubular myopathy is a disease characterized by early onset and the presence of uniformly small muscle fibers with centrally placed nuclei resembling fetal myotubes. Onset of clinical signs is typically at or near birth, and affected males have profound hypotonia and weakness accompanied by respiratory difficulties.

Test specific information



The disease may show itself on different ages, in which it cannot be estimated when the first symptoms may show themselves. Differences may exist between littermates, and between breeds.


Normally the result can be expected within 10 working days. This turn-around-time starts when both the sample and the fully filled-out and signed submission form have been received.

Location of disease or trait

This disease leads to a loss of brain function.

Breed dependence

This DNA test is available for the following breeds: Labrador Retriever. Additional information is available in the Frequently Asked Questions (FAQ).

Sample type

For this DNA test we accept the following materials: Swab, Semen, Tissue, Blood Heparin, Blood EDTA. Please contact Dr. Van Haeringen Laboratorium if you wish to submit other material as listed.


The following results are possible for a female: the mode of inheritance is based on recessive or dominant patterns.

The following results are possible for a male:
- A male animal has the sex chromosome Y and a healthy allel. When used in breeding, this animal will not become affected by the disease, nor will the disease be inherited to the next generation.
- A male animal has the sex chromosome Y and a disease allel. When used in breeding, this animal will become affected by the disease. Also, male offspring will receive the Y-chromosome, whereas female offspring will receive the disease allele.


The disease is inherited in an X-chromosomal manner. This means, that female individuals can be free (homozygous normal), affected (homozygous affected) or carrier (heterozygous).

Male individuals carry only one copy of the X-chromosome, which results in the effect that male carriers will also be affected.

Female carriers may spread the disease in a population without showing symptoms themselves. Because of this, it is extremely important to identify carriers correctly to prevent spreading of a disease.

Severity of Disease




Code H427
€ 47,80 (incl. 21% VAT)
€ 39,50 (excl. VAT)