(A) Type I (Hahn-Steinthal) Capitellar Fracture. A Portion of the Trochlea May Be Involved in This Fracture. (B) Type II (Kocher-Lorenz) Capitellar Fracture. Very Little Subchondral Bone is Attached to the Capitellar Fragment.

(From AthwalGS, RanigaS. Distal humerus fractures. In: TornettaP III, RicciWM, OstrumRF, et al., eds. Rockwood and Green’s Fractures in Adults. Vol 2. 9th ed. Philadelphia: Wolters Kluwer; 2020:1347–1413.)