Patients with recurrence after radiotherapy are often encountered in clinical practice.Patients with recurrence after radiotherapy are less likely to undergo surgery or secondary radiotherapy, and the guidelines recommend only systemic therapy, although the effective rate is relatively low.For patients with local recurrence without distant metastasis, local treatment is still significant.Radioactive I-125 Seed Implantation (RISI) treatment is to I-125 Radioactive nuclide directly inside the implanted tumors, make its rays to continuous destruction of tumor cells, have inside the tumor target high dose, low dose of normal tissue around, and its radiation is low dose rate, in theory, more conducive to the protection of the normal tissue, more suitable for salvage treatment of recurrence after radiotherapy lesions.Some retrospective studies on RISI treatment of NSCLC showed that the local control rate was up to 25%-80%, and there were few reports of toxic and side effects, suggesting that it had good efficiency and safety.Therefore, for patients with recurrent NSCLC after chest radiotherapy, RISI may be considered.And template technology, 3 d printing is a new kind of technology in recent years, can be individualized and human body surface, the guide posts on the the direction of the puncture needle can be accurately controlled, the current data show that in the template with CT guided by solid tumors as well had significantly higher accuracy, as the actual target dose of basic postoperative can reach the design request of the preoperative planning, so the application of 3D printing template helps to further improve the operation efficiency and safety, also has potential promotion effect to curative effect.The purpose of this study was: (1) to observe the efficacy, toxic and side effects of RISI in the treatment of recurrent NSCLC after radiotherapy under the guidance of 3D printing template assisted CT, and to evaluate its safety and effectiveness;(2) to explore the relationship between the efficacy, toxicity and side effects of RISI dose in the treatment of recurrent NSCLC after radiotherapy;(3) analyze the relevant influencing factors affecting the effect/toxicity of RISI in the treatment of recurrent NSCLC after radiotherapy.
The purpose of this study was to observe the efficacy and adverse reactions of RISI in the treatment of recurrent NSCLC after radiotherapy, and to evaluate its safety and efficacy.To explore the relationship between the efficacy, toxicity and side effects of recurrent NSCLC treated with different RISI doses after radiotherapy.To analyze the relevant influencing factors affecting the efficacy/toxicity of RISI in the treatment of recurrent NSCLC after radiotherapy. This study is a non-randomized, prospective, single-arm, cohort study.Patients meeting the inclusion criteria were enrolled consecutively in the order of admission and treatment, and a total of 30 patients were expected to be enrolled.The therapeutic dose range of I-125 was 140-160Gy, and the prescribed dose was intended to be divided into 15 cases of 140-150Gy and 150-160Gy, respectively. The specific situation was subject to the actual postoperative verified dose.
Study Type
OBSERVATIONAL
Enrollment
30
(1) positioning and preoperative plan design;(2) 3D printing template design and production;(3) reset and seeds implantation;(4) intraoperative optimization;Postoperative dose verification.Dosimetric parameters include: dose D90 and D100 reaching a certain percentage target volume; Target volume V100, V150 and V200 reaching a certain percentage of prescribed dose;And the dose of organs at risk: Dmean, D2cc, d0.5cc, d0.1cc. Regular follow-up was conducted after treatment.
Peking University Third Hospital
Beijing, Beijing Municipality, China
RECRUITINGLocal tumor control rate
The time from the date of seeds implantation to the date of recurrence of the implanted tumor or the date of last observation.
Time frame: Outcomes will be followed up every 2-3 months after enrollment. The total follow-up time is 2 years.
Incidence of adverse events
The adverse events are evaluated by the common terminology criteria for adverse events (CTCAE). The rate of each adverse event will be measured.
Time frame: Outcomes will be followed up every 2-3 months after enrollment. The total follow-up time is 2 years.
Overall survival time
The time from the date of seeds implantation to the date of death from any cause or the date of last observation.
Time frame: Outcomes will be followed up every 2-3 months after enrollment. The total follow-up time is 2 years
Progression-free survival
The time between the beginning of treatment and the date of progression of the disease or the date of death for any reasons or the date of last observation.
Time frame: Outcomes will be followed up every 2-3 months after enrollment. The total follow-up time is 2 years
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.