Testicular cancer survivorship program at National Cancer Institute in Slovakia.

e13792 Background: Testicular germ cell tumors (GCTs) are highly curable malignancies. Survivors of GCTs represent a growing population with a long life expectancy after curative cancer treatment. GCT survivors may experience a variety of late adverse effects of treatment and reduced quality of life. Therefore, National Cancer Institute in Slovakia has developed a testicular cancer survivorship program with a long-term follow-up of GCT survivors aiming to evaluate late toxicities and their underlying molecular mechanisms. Methods: The long-term annual follow-up of GCT survivors is established per our institutional guidelines for testicular cancer survivorship program. GCT survivors are referred to our testicular survivorship outpatient clinic at least 5 years after completion of curative treatment, and are followed annually throughout their lives. During each visit, patient’s history is updated, physical examination is performed, blood and urine samples are collected, and survivors complete validated questionnaires for evaluation of late toxicities (peripheral neuropathy, sexual dysfunction, cognitive impairment) and quality of life. Complete blood count, metabolic panel, lipid panel, levels of serum tumor markers, testosterone, luteinizing hormone and follicle stimulating hormone are measured at each visit. Plasma aliquots and urine samples from every visit are prospectively collected and stored in the biobank of our Translational Research Unit. Data including age, medical history, histological type, stage, prognostic group, type of treatment, laboratory values, and questionnaire scores are collected and recorded in our electronic survivorship database. In addition, information on important survivorship topics is provided and healthy lifestyle changes are suggested to all survivors. Results: From August 2015 to January 2024 our testicular survivorship outpatient clinic performed 1733 follow-up visits in 407 GCT survivors treated at our institution from 1984 to 2019. Median age at the first follow-up visit at the survivorship clinic was 41 years (range 21 - 77). Median time from the curative treatment to the first follow-up visit at the survivorship clinic was 7 years (range 4 - 32). To date, 104 patients have had at least 7 follow-ups. Eighty-six (21.13 %) patients were treated with surgery only, 278 (68.3 %) with chemotherapy, 28 (6.88 %) with radiotherapy, and 15 (3.69 %) patients with both chemotherapy and radiotherapy. To date, 18 publications (including papers and abstracts) have been published using the data from our testicular survivorship database. Conclusions: Testicular cancer survivorship program with the long-term annual follow-up of GCT survivors has been established at National Cancer Institute in Slovakia. The ongoing prospective study for evaluation of late toxicities and their underlying mechanisms is part of the program. Our large database offers valuable data for the future research.