Alexis Ohanian, the husband of tennis pro Serena Williams, recently had thyroid nodules removed, after monitoring them for four years. He shared the news on Instagram and urged his followers to monitor their health, stating that the nodules were likely to turn cancerous. Ohanian's mother passed away from cancer and he did not want to take any chances with his own health. His surgery went well and he is now extra grateful this Thanksgiving. Thyroid nodules are common but can become cancerous, according to the Mayo Clinic.