On March 16, 2026 Telix Pharmaceuticals Limited (ASX: TLX, NASDAQ: TLX, "Telix") reported the resubmission of a New Drug Application (NDA) to the United States (U.S.) Food and Drug Administration (FDA) for TLX101-Px, (Pixclara1, Floretyrosine F 18 or 18F-FET), an investigational PET2 imaging agent for the characterization of recurrent or progressive glioma (brain cancer) from treatment related changes in both adult and pediatric patients.
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Telix has resubmitted the NDA with the additional data requested by the FDA. The Company believes, based on the Type A meeting and ongoing consultation with the FDA, that the additional data and statistical analysis, along with the primary data set provided in the original submission, appropriately addresses the Complete Response Letter3.
Given the potential to address significant unmet medical need, TLX101-Px has been granted Orphan Drug4 and Fast Track5 designations by the FDA. PET imaging with 18F-FET is already included in international clinical practice guidelines for the imaging of gliomas6, however there is currently no FDA-approved targeted amino acid PET agent for adult and pediatric brain cancer imaging commercially available in the U.S.
Dr. David N. Cade, Telix Group Chief Medical Officer, said, "We appreciate the FDA’s recognition of the critical unmet need to improve the diagnosis and management of glioma, particularly in the post-treatment setting. Our resubmission is supported by an extensive and compelling data set – particularly so for an orphan indication. We are grateful to our global clinical collaborators, who share our commitment to ensuring patients in the U.S. can benefit from this important patient management tool."
Maggie Haynes, Executive Director, Head for the Cure Foundation, added: "Our community is encouraged by the FDA’s ongoing engagement and guidance to the sponsor and support for the Expanded Access Program for TLX101-Px. We are hopeful of an expedited review, so this important and proven imaging option can become available to those who urgently need it."
About TLX101-Px
TLX101-Px is a PET imaging agent, which has been granted fast track and orphan drug designations by the FDA as an imaging agent for the characterization of recurrent or progressive glioma from treatment related changes. TLX101-Px targets membrane transport proteins known as LAT1 and LAT27. This enables TLX101-Px to be potentially utilized as a companion diagnostic agent to TLX101-Tx (iodofalan 131I), Telix’s LAT1-targeting glioblastoma (GBM) therapy candidate, currently under investigation in the pivotal IPAX-BrIGHT study8.
About gliomas in the U.S.
Gliomas are very diffusely infiltrative tumors that affect the surrounding brain tissue. They are the most common form of central nervous system (CNS) neoplasm that originates from glial cells, accounting for approximately 30% of all brain and CNS tumors and 80% of all malignant brain tumors9. In the U.S., there are six cases of gliomas diagnosed per 100,000 people every year10. GBM is a high-grade glioma and the most common and aggressive form of primary brain cancer, with approximately 22,000 new cases diagnosed annually in the U.S.11. The mainstay of treatment for GBM comprises surgical resection, followed by combined radiotherapy and chemotherapy. Despite such treatment, recurrence occurs in almost all patients12, with an expected survival duration of 12-15 months from diagnosis.
(Press release, Telix Pharmaceuticals, MAR 16, 2026, View Source [SID1234663549])