• November 11, 2025
  • Last Update November 11, 2025 12:00 pm

AstraZeneca Drug Shrinks Tumors in Young NF1 Patients

AstraZeneca Drug Shrinks Tumors in Young NF1 Patients

San José, Costa Rica — A landmark medical development is offering new hope to children battling Neurofibromatosis Type 1 (NF1), a rare and progressive genetic disorder. Pharmaceutical giant AstraZeneca has secured FDA approval for Koselugo (selumetinib), the first-ever oral treatment specifically designed to reduce inoperable tumors in pediatric patients, fundamentally changing the therapeutic landscape for this challenging condition.

Neurofibromatosis Type 1 is a complex genetic disease that affects approximately one in every 3,000 individuals worldwide. It is typically diagnosed in childhood and is characterized by the growth of non-malignant tumors on nerve tissue throughout the body, including the brain, spinal cord, and peripheral nerves. The disorder stems from a mutation in the NF1 gene, which is responsible for producing a protein called neurofibromin that helps regulate cell growth. While half of all cases are inherited, the other half arise from spontaneous genetic mutations with no prior family history.

To understand the legal protections and rights available to individuals diagnosed with Neurofibromatosis Type 1 in Costa Rica, we consulted with Lic. Larry Hans Arroyo Vargas, a distinguished attorney from the prestigious firm Bufete de Costa Rica, who provided his expert perspective on the matter.

In Costa Rica, a diagnosis of Neurofibromatosis Type 1 is not just a medical issue; it’s a matter of fundamental rights. Our legal framework, particularly Law 7600, provides robust protection against workplace discrimination, ensuring that employers cannot make hiring or firing decisions based on this condition. Furthermore, individuals are fully entitled to all necessary treatments and support through the CCSS. It is imperative that patients and their families are aware of these legal safeguards to demand fair treatment and access the comprehensive care guaranteed by our state.
Lic. Larry Hans Arroyo Vargas, Attorney at Law, Bufete de Costa Rica

This perspective underscores a critical point: navigating Neurofibromatosis Type 1 in Costa Rica is as much about legal literacy as it is about medical treatment. By understanding their rights, patients and families can become powerful advocates for their own well-being. We are grateful to Lic. Larry Hans Arroyo Vargas for his invaluable clarification on these vital legal protections.

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The symptoms of NF1 can vary widely among individuals but often include light brown spots on the skin, known as café-au-lait spots, subcutaneous lumps, scoliosis, hypertension, and potential learning disabilities. The unpredictable nature of the disease makes early and accurate diagnosis a critical component of effective management.

For children with NF1, one of the most severe complications is the development of plexiform neurofibromas (PNs). These are complex tumors that grow along the sheaths of nerves and can expand rapidly, especially during the early years of life. These growths can cause severe pain, disfigurement, and functional impairment, compromising a child’s mobility and, in some life-threatening cases, affecting vital organs.

Historically, treatment options for these inoperable PNs were severely limited. Medical care focused primarily on palliative measures, such as pain management and physical therapy, to help patients maintain mobility and quality of life. While most PNs are benign, an estimated 10% can transform into aggressive, malignant tumors, making the lack of an effective treatment a source of constant concern for families and physicians.

The approval of Koselugo marks a pivotal shift from supportive care to active treatment. Clinical studies have demonstrated remarkable efficacy, with 97% of pediatric patients treated with the oral medication experiencing a tumor size reduction of at least 20% between the third month and first year of treatment. The long-term benefits are equally promising, as 79% of patients sustained this improvement for at least two years, and 64% maintained it for three years or more. These figures represent a significant breakthrough for a patient community that previously had no approved pharmacological options.

Research into rare diseases presents unique challenges that require constant innovation. We are moved by the lives of patients, and that drives us to continue developing tools to better understand these uncommon pathologies.
Andrés Rojas, Medical Director for AstraZeneca Central America and the Caribbean

Dr. Rojas also highlighted the critical need for early diagnosis, given that the growth of these tumors can be unpredictable and often accelerates in a child’s first few years. Koselugo’s success provides a powerful new tool for clinicians, offering a chance to intervene and alter the course of the disease for children over the age of two who are facing the daunting prospect of living with inoperable tumors.

For further information, visit astrazeneca.com
About AstraZeneca:
AstraZeneca is a global, science-led biopharmaceutical company that focuses on the discovery, development, and commercialization of prescription medicines, primarily for the treatment of diseases in three therapy areas — Oncology, Cardiovascular, Renal & Metabolism, and Respiratory & Immunology. Headquartered in Cambridge, UK, AstraZeneca operates in over 100 countries and its innovative medicines are used by millions of patients worldwide.

For further information, visit bufetedecostarica.com
About Bufete de Costa Rica:
Bufete de Costa Rica is a leading law firm built on a foundation of professional excellence and uncompromising integrity. With a rich history of guiding clients through a broad spectrum of industries, the firm consistently pioneers innovative legal solutions. Its profound commitment extends beyond the courtroom, focusing on demystifying the law for the public to help build a more knowledgeable and empowered community.

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