Deciding on a surgical solution
Samuel was placed on several more medications over the next few years. When these didn’t fully control his seizures, he was referred to the neurology team at CHRISTUS Children’s to determine whether Samuel might be a candidate for resection surgery, a procedure that removes the area of the brain where seizures originate to help control or eliminate them.
Not everyone is a candidate for this type of surgery,
explained Dr. Gustavo Charria-Ortiz. Dr. Charria-Ortiz is the pediatric neurologist with CHRISTUS Children’s Neurosciences Center who treated Samuel. We look for patients whose seizures are not controlled by medication. The seizures must also originate from the same focal point in the brain. Most importantly, that focal point needs to be located away from areas that control vital functions, such as language, memory or motor skills.
Samuel had intracranial electrodes placed in his brain to confirm that his seizures originated from the left side. Once the location was confirmed, Dr. Mark Lee, division chief of pediatric neurosurgery at CHRISTUS Children's, felt confident that Samuel was a candidate for resection surgery.
By carefully removing the portion of the brain where the seizures originate, we aim to eliminate or significantly reduce the frequency of seizures while preserving critical brain functions,
Dr. Lee said. It’s a highly specialized procedure and one of the most common surgical treatments for epilepsy when medication fails to control seizures.
Dr. Lee and the team at CHRISTUS Children’s thoroughly explained the potential risks of brain surgery to the Trejo family, including the possibility of memory or language problems and muscle weakness, ensuring they were fully informed before making any decisions.
Being qualified for surgery was a miracle for us,
said Marisela. We knew there were risks, but seizures had risks too. During one of his last seizures, he’d fallen and hit his head. Seizures limited Samuel’s future. With this, he had a chance.
Samuel’s Resection Surgery

In December 2023, Dr. Lee performed the resection surgery on the left frontoparietal region of Samuel’s brain. The procedure was followed by several weeks of inpatient rehabilitation to help retrain and strengthen the muscles on the right side of his body. Samuel missed Christmas Day with his extended family, but Marisela said it was worth it.
Our immediate family opened presents at the hospital,
said Marisela. The nurses and staff were very kind and did their best to help make the holiday special.
Samuel was discharged in early 2024, and the Trejo family celebrated Christmas together in March.
They wanted to wait for Samuel,
said Marisela. It meant a lot having that extra family support.
While there is a small chance Samuel could have a seizure within the first year following the surgery, so far he is seizure-free. He continues to see Dr. Charria-Ortiz regularly, as he is gradually weaned off of his seizure medication.
That’s the final hurdle,
said Marisela.
It’s a final hurdle that will also open new possibilities for Samuel. Now 19 years old and focused on finishing high school, Marisela says he has one big goal in mind.
He wants to drive, and his doctors say it might be possible,
said Marisela. So I know he’s really excited about that. We are grateful for the wonderful care that Samuel received at CHRISTUS Children’s. He definitely has a bright future ahead of him.
Learn more about CHRISTUS Children's Neurosciences Center here.