Here are the top 20 reviews concerning IGF-1/insulin axis and risk of cancer. If it were me that is in remission from multiple cancers I would probably look into the risks at length.
1: Buono R, Longo VD. Starvation, Stress Resistance, and Cancer. Trends
Endocrinol Metab. 2018 Apr;29(4):271-280. doi: 10.1016/j.tem.2018.01.008. Epub
2018 Feb 17. Review. PubMed PMID: 29463451.
2: de-Freitas-Junior JCM, Andrade-da-Costa J, Silva MC, Pinho SS. Glycans as
Regulatory Elements of the Insulin/IGF System: Impact in Cancer Progression. Int
J Mol Sci. 2017 Sep 7;18(9). pii: E1921. doi: 10.3390/ijms18091921. Review.
PubMed PMID: 28880250; PubMed Central PMCID: PMC5618570.
3: Shanmugalingam T, Bosco C, Ridley AJ, Van Hemelrijck M. Is there a role for
IGF-1 in the development of second primary cancers? Cancer Med. 2016
Nov;5(11):3353-3367. doi: 10.1002/cam4.871. Epub 2016 Oct 13. Review. PubMed
PMID: 27734632; PubMed Central PMCID: PMC5119990.
4: Zielinska HA, Bahl A, Holly JM, Perks CM. Epithelial-to-mesenchymal transition
in breast cancer: a role for insulin-like growth factor I and insulin-like growth
factor-binding protein 3? Breast Cancer (Dove Med Press). 2015 Jan 19;7:9-19.
doi: 10.2147/BCTT.S43932. eCollection 2015. Review. PubMed PMID: 25632238; PubMed
Central PMCID: PMC4304531.
5: Belardi V, Gallagher EJ, Novosyadlyy R, LeRoith D. Insulin and IGFs in
obesity-related breast cancer. J Mammary Gland Biol Neoplasia. 2013
Dec;18(3-4):277-89. doi: 10.1007/s10911-013-9303-7. Epub 2013 Oct 24. Review.
PubMed PMID: 24154546.
6: Cohen DH, LeRoith D. Obesity, type 2 diabetes, and cancer: the insulin and IGF
connection. Endocr Relat Cancer. 2012 Sep 5;19(5):F27-45. doi:
10.1530/ERC-11-0374. Print 2012 Oct. Review. PubMed PMID: 22593429.
7: Tsugane S, Inoue M. Insulin resistance and cancer: epidemiological evidence.
Cancer Sci. 2010 May;101(5):1073-9. doi: 10.1111/j.1349-7006.2010.01521.x. Epub
2010 Feb 3. Review. PubMed PMID: 20345478.
8: Pan SY, DesMeules M. Energy intake, physical activity, energy balance, and
cancer: epidemiologic evidence. Methods Mol Biol. 2009;472:191-215. doi:
10.1007/978-1-60327-492-0_8. Review. PubMed PMID: 19107434.
9: Fair AM, Montgomery K. Energy balance, physical activity, and cancer risk.
Methods Mol Biol. 2009;472:57-88. doi: 10.1007/978-1-60327-492-0_3. Review.
PubMed PMID: 19107429.
10: Dossus L, Kaaks R. Nutrition, metabolic factors and cancer risk. Best Pract
Res Clin Endocrinol Metab. 2008 Aug;22(4):551-71. doi:
10.1016/j.beem.2008.08.003. Review. PubMed PMID: 18971118.
11: Park JH. Inhibition of colon cancer cell growth by dietary components: role
of the insulin-like growth factor (IGF) system. Asia Pac J Clin Nutr. 2008;17
Suppl 1:257-60. Review. PubMed PMID: 18296350.
12: Meinbach DS, Lokeshwar BL. Insulin-like growth factors and their binding
proteins in prostate cancer: cause or consequence? Urol Oncol. 2006
Jul-Aug;24(4):294-306. Review. PubMed PMID: 16818181.
13: Durai R, Davies M, Yang W, Yang SY, Seifalian A, Goldspink G, Winslet M.
Biology of insulin-like growth factor binding protein-4 and its role in cancer
(review). Int J Oncol. 2006 Jun;28(6):1317-25. Review. PubMed PMID: 16685432.
14: Gómez JM. The role of insulin-like growth factor I components in the
regulation of vitamin D. Curr Pharm Biotechnol. 2006 Apr;7(2):125-32. Review.
PubMed PMID: 16724947.
15: Wolk A. Diet, lifestyle and risk of prostate cancer. Acta Oncol.
2005;44(3):277-81. Review. PubMed PMID: 16076700.
16: Mattson MP, Maudsley S, Martin B. A neural signaling triumvirate that
influences ageing and age-related disease: insulin/IGF-1, BDNF and serotonin.
Ageing Res Rev. 2004 Nov;3(4):445-64. Review. PubMed PMID: 15541711.
17: Strumberg D, Boeing H, Scheulen ME, Förster H, Seeber S. [Nutrition,
lifestyle and cancer: strategies for primary prevention]. Dtsch Med Wochenschr.
2004 Sep 3;129(36):1877-82. Review. German. PubMed PMID: 15368163.
18: Kaaks R. Nutrition, insulin, IGF-1 metabolism and cancer risk: a summary of
epidemiological evidence. Novartis Found Symp. 2004;262:247-60; discussion
260-68. Review. PubMed PMID: 15562834.
19: Yakar S, Pennisi P, Zhao H, Zhang Y, LeRoith D. Circulating IGF-1 and its
role in cancer: lessons from the IGF-1 gene deletion (LID) mouse. Novartis Found
Symp. 2004;262:3-9; discussion 9-18, 265-8. Review. PubMed PMID: 15562820.
20: Boyd DB. Insulin and cancer. Integr Cancer Ther. 2003 Dec;2(4):315-29.
Review. PubMed PMID: 14713323.