This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
Which of the following breast tumor is bilateral 
Select and explain. 
A. Colloid carcinoma, B. Invasive ductualr carcinoma, C. Invasive Lobular carcinoma, D. Medullary carcinoma
D: Medullary carcinoma
Answer: D: Medullary carcinoma 
Explanation: Refer Robbins page no 1059 Invasive ductal carcinoma was repoed to be the most common type found in 10 (71.5%) breasts. Grade III breast carcinoma was revealed in 9 and Grade I cancer in 3 specimens. CONCLUSION: Bilateral breast cancer is invariably advanced when diagnosed. Mammogram is a valuable tool in early detection..