Final answer:
A palpable cystic mass in the scrotum that often resolves on its own is likely a benign testicular cyst, such as an epididymal cyst or a spermatocele. These cysts usually do not require surgical treatment. It is important to differentiate them from testicular cancer, which requires immediate medical treatment.
Step-by-step explanation:
A palpable cystic mass in the scrotum that varies in size and commonly resolves on its own could likely be a testicular cyst, such as an epididymal cyst or a spermatocele. These are benign (non-cancerous) cysts filled with fluid that are located in the epididymis or the tunica albuginea of the testis. Such cysts are a part of common disorders of the male reproductive system. Testicular cysts typically do not require surgical removal unless they become large or cause symptoms, as they generally resolve independently over time.
Testicular cancer is another, more serious, condition that can affect the testes, which is characterized by the uncontrolled growth of cells that form a tumor and is most common in young men between the ages of 15 and 35. Unlike benign testicular cysts, testicular cancer needs prompt medical intervention and can often be cured if detected early.