The medial epicondyle (on the humerus) is located closet to the body when in the anatomical position and the trochlea (on the humerus) is located slightly laterally and inferior to the medial epicondyle.

The medial epicondyle is the most medial structure of the humerus. The trochlea is the second.

The trochlea is the medial process of the humerus. The humerus articulates with the ulna at the trochlea.

Medial epicondyle of the humerus.

I think you are asking about the medial epicondyle not the medical epicondyle. The medial epicondyle is a small bony bump on the end of the humerus kind of making the elbow joint