1,2,3 --- 3,2,1
Type I has three Ps which are Parathyroid, Pancreas, and Pituitary
Type II has two Ps which are Parathyroid, and Pheochromocytoma
Type III has One P which is Pheochromocytoma.
Also remember that medullary thyroid carcinoma and pheochromocytoma are both seen in Type II and III but not Type I
