Halasartan (Hebrew: חלאסרטן) or Stop Cancer is an Israeli non-governmental organization that primarily works on a voluntary basis to provide relief and support for young oncology patients.

[1][2][3] According to the European Society for Medical Oncology, the organization serves young patients with cancer among the ages 18–45 years,[4][2] through its large-scale operations.

[5] In 2016, Zohar Yakobson, founder of the Israeli Tal Center for Integrative Oncology,[4] joined hands with Shira Segal Kuperman,[4] to establish an appropriate "solution or response for young people with cancer.

[7] The NGO, supported by Merck Sharp & Dohme (MSD),[7][4] assisted young cancer patients in dating and social interactions.

[8] Multidisciplinary in nature, the clinics offered patients assistance with emotional distress surrounding the illness, addressing issues like fertility preservation,[17] hormonal effects and early menopause, sexual functioning, and rehabilitation, as well as psychosocial needs like coping with young parenthood, new relationships, loneliness, and returning to work.

[8] Unlike other oncological departments serving cancer patients of all ages, the young adults' clinic programs began focusing on "preserving fertility, offering guidance and making these issues a priority.

[7] At this new clinic site within Sheba, the focus was on ensuring an holistic approach to patient well-being, with highly individualized programs.

[23] In addition, due to life insurance policies, young cancer survivors are not eligible for any house-funding or mortgage.

[32] In 2020, in recognition of its activities, the Halasartan Association was awarded the international Zusman-Joint Prize for excellence in the development of social services.

"[3] According to the prize committee, the association "seeks to change the popular perception that cancer patients are the sole responsibility of medical professionals, providing a greater role for the community.