Lattice Radiotherapy for Large Cancers

(LRT Trial)

This trial explores whether Lattice Radiation Therapy (LRT), a special type of radiation, can shrink large tumors when combined with standard palliative radiation. The main goals are to determine if LRT is safe and effective in reducing tumor size without introducing new side effects. Individuals with a large tumor outside the brain (at least 4.5 cm) who plan to receive palliative radiation may qualify. Participants will receive one additional LRT session before beginning their regular radiation treatment. As an unphased trial, this study provides a unique opportunity to contribute to innovative research that could enhance future cancer treatments.

The trial does not specify if you need to stop taking your current medications. However, you cannot receive certain cancer therapies at the same time as the trial's radiation treatment. It's best to discuss your specific medications with the trial team.

A previous study demonstrated that Lattice Radiation Therapy (LRT) is safe for patients with large tumors, specifically those over 5 cm in size. Research has shown that patients find LRT manageable, even compared to other radiation methods. Patients did not experience more side effects, and in some cases, LRT proved safer than other radiation treatments. Another study found LRT to be an effective and safe option for relieving symptoms in large tumors, even for patients who had previous radiation treatments. Overall, these findings suggest that LRT is generally safe for treating large tumors.¹²³⁴⁵

Unlike standard radiation therapy options for large cancers, Lattice Radiation Therapy (LRT) introduces a novel approach by delivering a focused, high-dose 'lattice' pattern of radiation before starting regular palliative treatment. This technique aims to precisely target the tumor's core, potentially enhancing the effectiveness of radiation while minimizing damage to surrounding healthy tissue. Researchers are excited about LRT because its unique delivery method could lead to better outcomes for patients with large or difficult-to-treat tumors, offering a promising advancement over traditional methods.

Studies have shown that Lattice Radiation Therapy (LRT) effectively shrinks large tumors, particularly those exceeding 5 cm. Research indicates that about 90% of patients experience a quick and noticeable improvement in symptoms. In this trial, participants will receive one additional dose of Intensity-Modulated Radiation Therapy (IMRT), known as Lattice Radiation Therapy (LRT), before starting regular palliative radiation therapy. LRT uses a specialized form of radiation to target tumors more precisely, potentially controlling large tumors better without causing additional side effects. This method is well-tolerated and has been found to work as effectively as standard radiation treatments for solid tumors. Overall, LRT offers a promising option for managing large tumors that cannot be surgically removed.¹²³⁴⁶