This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Pathology
Retinoblastomas arising in the context of germ-line mutations not only may be bilateral, but also may be associated with______ (so called "trilateral" retinoblastoma) 
Select and explain. 
A. Medulloblastoma, B. Pinealoblastoma, C. Neuroblastoma, D. Hemangioblastoma
B: Pinealoblastoma
Answer: B: Pinealoblastoma 
Explanation: Ans. (b) Pinealoblastoma(Ref: Robbins 9th/pg 1339)*"Trilateral" retinoblastoma refers to bilateral Retinoblastomas pluspinealoblastoma, occurring in individuals inheriting a germline mutation of one RB allele; it is associated with a dismal outcome*Retinoblastoma is the most common primary intraocular malignancy of children.