This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatrics, environment and nutrition, Subject name: Pathology
Rosettes are characteristically seen in - 
Select and explain. 
A. Retinoblastoma, B. Melanoma, C. Dysgerminoma, D. Lymphoma
A: Retinoblastoma
Answer: A: Retinoblastoma 
Explanation: Robbins basic pathology 9th edition page no 261, Differentiated structures are found within many retinoblastomas, the most common of these being Flexner-Wintersreiner rosettes. These structures consist of clusters of cuboidal or sho columnar cells arranged around a central lumen. The nuclei are displaced away from the nucleus. In well-differentiated tumors, there are Flexner-Wintersteiner rosettes and fleurettes reflecting photoreceptor differentiation