Meyahealth
HomeGeneticsConditionMyofibrillar myopathy
Back to Condition
Myofibrillar myopathy
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Condition

Myofibrillar myopathy

Myofibrillar myopathy is a group of progressive disorders characterized by muscle weakness, primarily affecting skeletal muscles but sometimes also the heart, with symptoms varying widely among individuals.

Overview

Myofibrillar myopathy refers to a group of disorders characterized by muscle weakness (myopathy) that worsens over time. It primarily affects the skeletal muscles, which are used for movement. In some cases, the heart (cardiac) muscle is also affected.

The signs and symptoms of myofibrillar myopathy vary widely. Onset typically occurs in mid-adulthood, but can range from infancy to late adulthood. Weakness most often begins in the hands, forearms, feet, and lower legs (distal muscles), but can also start in muscles near the center of the body (proximal muscles) and spread.

Other signs and symptoms include muscle pain (myalgia) or weakness and loss of sensation in the limbs (peripheral neuropathy). Skeletal problems like joint stiffness (contractures) and abnormal side-to-side curvature of the spine can occur. Some individuals also develop clouding in the lenses of the eyes.

Some individuals develop cardiomyopathy, a weakening of the heart muscle, which can sometimes

Frequently Asked Questions

If the heart muscle is affected (cardiomyopathy), you might experience symptoms such as shortness of breath, fatigue, swelling in the legs or ankles, or an irregular heartbeat. It's important to report any new or worsening cardiac symptoms to your doctor immediately.
While there's no cure, management often involves physical and occupational therapy to maintain muscle function and mobility. Medications may be used to manage specific symptoms like pain. Regular monitoring, especially for heart involvement, is crucial to address complications early.
Initial signs often include weakness in the hands, forearms, feet, and lower legs, though it can also start in muscles closer to the body's center. This weakness usually worsens over time. Other symptoms like muscle pain, loss of sensation in limbs, joint stiffness, or spinal curvature may also develop.
Yes, myofibrillar myopathy is a genetic condition, meaning it can be inherited. The specific inheritance pattern can vary depending on the gene mutation involved, but it is often passed down in an autosomal dominant or autosomal recessive manner. Genetic counseling can help families understand their specific risks.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

Meyahealth

Ⓒ 2026. All rights reserved by MEYA

About UsTerms & PolicyFAQ