Testicular cancer is one of the leading malignancies affecting young men, with germ cell tumors (GCTs) being the most prevalent type. These tumors are classified into two main subtypes: seminomas and nonseminomatous germ cell tumors (NSGCTs), with the latter known for their higher likelihood of metastasis. Early detection through imaging and tumor markers like alpha-fetoprotein (AFP) and beta-human chorionic gonadotropin (HCG) is crucial for favorable outcomes. We present a case of a 40-year-old male patient with a recent history of a surgically repaired right testicular torsion presenting with progressive right testicular swelling and pain. Scrotal ultrasound revealed a markedly enlarged and heterogeneous right testicle measuring 5.4 cm, with mixed echogenicity and cystic features, highly suspicious for malignancy. Tumor markers were significantly elevated, with AFP at 19,420 ng/mL and HCG at 4,749 mIU/mL, indicating a highrisk testicular tumor. The patient underwent a right radical orchiectomy, which was complicated by tumor rupture during surgery. Pathology confirmed a testicular mixed GCT composed of embryonal carcinoma, yolk sac tumor, and teratoma with vascular/lymphatic invasion. This case highlights the importance of rapid intervention in managing NSGCTs, potential role of tumors in testicular torsions, and the unusual presentation of a rapidly growing NSGCT.