Preprint Article Version 1 This version is not peer-reviewed Version 1 : Received: 26 September 2024 / Approved: 26 September 2024 / Online: 26 September 2024 (14:45:33 CEST) Onah, E.; Eze, U. J.; Abdulraheem, A. S.; Ezigbo, U. G.; Amorha, K. C. Optimizing Unsupervised Feature Engineering and Predictive Models for Thyroid Cancer Recurrence Prediction. Preprints 2024, 2024092121. https://doi.org/10.20944/preprints202409.2121.v1 Onah, E.; Eze, U. J.; Abdulraheem, A. S.; Ezigbo, U. G.; Amorha, K. C.