This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Testis and scrotum, Subject name: Surgery
Chinese lantern on transillumination seen in: 
Select and explain. 
A. Spermatocele, B. Epididymal cyst, C. Hydrocele of cord, D. Secondary hydrocele
B: Epididymal cyst
Answer: B: Epididymal cyst 
Explanation: Chinese - Lantern pattern on transillumination is more commonly seen in epididymal cyst.