This statement is true for tumors arising in the testis itself. The overwhelming majority (over 95%) of primary testicular tumors are germ cell tumors, and virtually all of these are malignant. This includes seminomas and non-seminomatous germ cell tumors (NSGCTs) like embryonal carcinoma, yolk sac tumor, choriocarcinoma, and teratoma. Even mature teratomas in the testis, which contain fully differentiated tissues, are considered malignant because they have the potential for metastasis and are often found with other malignant components. This is in stark contrast to ovarian teratomas (dermoid cysts), which are usually benign. The remaining small percentage of testicular tumors are sex cord-stromal tumors (like Leydig or Sertoli cell tumors), which can be benign or malignant. Therefore, any solid testicular mass in an adult should be considered malignant until proven otherwise.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• Joseph Soko – 101 pts

• Visual Pathway Lesions
• Positive and Negative Symptoms
• Hallucinations and Delusions
• Antipsychotic Medications
• Emergency: Environmental Emergencies