This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
35 years male presents with a swelling in scrotum that is non tender and seperate from testes and on transillumination, chinese lantern pattern is seen diagnosis 
Select and explain. 
A. Vaginal hydrocele, B. Inguinal harnia, C. Epididymal cyst, D. Varicocele
C: Epididymal cyst
Answer: C: Epididymal cyst 
Explanation: Answer- C. Epididymal cystCysts of the epididymis (multiloculated epididymal cyst, spermatocele) are not swrounded by fluid and for this reason are felt as swellings above, behind the testis, which is also easily palpable in this situation.Because of the septation, multiloculated epididlmal cysts have a characteristic 'Chinese lantern' aPPearance on transillumination.