The fatty ridge and fatty cushion of the human pulmonary trunk.

Presence of a ridge of fatty tissue running obliquely upwards and backwards over the left aspects of the pulmonary trunk was observed. It started from the left end of the infundibulo-trucal junction and after running parallel adjacent to free anterior border of the left auricle, terminated into an expanded oval and discoid structure, a little above the level of the tip of the left auricle. The structure was found to be of constant occurrence, position and form.