Thinking neuromuscular disease? 

TK2d may be the diagnosis you’re looking for 

Thymidine kinase 2 deficiency (TK2d) is a rare, genetic mitochondrial disease1

An estimated 1 in 5000 people has a mitochondrial disease, making it one of the most prevalent groups of inherited neurological disorders. 2,3
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Learn More About TK2d

TK2d is a rare and often fatal primary mitochondrial disease. It mainly manifests as myopathy (muscle disease)1 

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How to Identify Patients With TK2d

Genetic testing is often the fastest way to confirm a TK2d diagnosis and can allow patients to seek the care they need2,4

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View Resources

Connect with information and organizations that can provide support for patients and providers

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Contact a UCB Member

For questions and information regarding TK2d and mitochondrial diseases, get in touch with a UCB member today.

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GL-DA-2600210 | Date of preparation: May 2026
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