May 2026 Research Update

At a glance

Genetic testing to identify NPC

Experts reached full agreement that Niemann-Pick disease type C (NPC) should be identified using genetic testing.

NPC in adult movement symptoms

NPC was noted as a genetic cause to consider when adults present with movement-related symptoms.

Clearer priorities, not new outcome data

May clarified diagnostic priorities for NPC in adult movement-disorder settings, but did not add new data on how often NPC is found or on patient outcomes.

Overview

This month focused on diagnosis, not treatment, for Niemann-Pick disease type C (NPC). The main update was about which genetic conditions adult movement clinics should actively try to identify.

An expert consensus effort placed NPC on a short list of conditions considered essential to detect with genetic testing in adult movement-disorders settings. In practical terms, NPC was highlighted as an important possibility when an adult has movement-related symptoms that could have a genetic cause.

The experts reviewed 59 disorders and reached complete agreement on a smaller set. NPC was one of the conditions with complete expert agreement. This adds clarity about diagnostic priorities and reflects rising awareness of NPC in these clinics.

This work did not measure how often NPC is found in real clinics. It also did not study treatments or report patient outcomes. The main change this month was clearer expert alignment on not missing NPC in adult movement-disorder evaluations where genetic testing is considered.

Research topics this month

Limitations

• This was expert agreement, not a measure of real-world diagnosis rates.
• The work did not test treatments or report patient outcomes.
• It is unclear how much this consensus will change actual testing pathways in clinics.

Important information

• This document summarizes recent research from PubMed-indexed publications using automated methods.
• It is intended for educational purposes and does not replace medical advice.
• Links to the original studies are provided via PubMed, where readers can explore abstracts and, when available, access full-text articles.
• Some studies may include additional details that were not accessible for this summary.
• Readers seeking more complete detail or context may find it helpful to review the original studies directly.

1. 1.Carvalho V, Guedes LC, Gatto E, Rodriguez-Violante M, Klein C, Rodriguez-Porcel F, Morgante F, Rossi M, Miranda M, Ganos C, Riboldi GM, Cesarini M, Darling A, Skorvanek M, van de Warrenburg B, Shalash A, Cossu G, Friedman J, Albanese A, Cardozo A, Lohmann K, Thaler A, Stamelou M, Saunders-Pullman R, Marras C, Sarva H, Bhatia KP, Ferreira JJ. Essential genetic testing in movement disorders - results from a Delphi study. Parkinsonism Relat Disord (2026). Open in new tab