"The papillary process of the caudate lobe, also known as the medial papillary process, represents a division of the inferior caudate lobe of the liver 1. The inferior aspect of the caudate may be divided into medial and lateral processes. While the lateral or caudate process is contiguous with the right liver lobe, the medial or papillary process extends leftward and towards the stomach 1,3."
"There is variable morphology of the inferior caudate lobe. Often, a sagittally-orientated inferior fissure or groove separates the lateral caudate and medial papillary processes. The papillary process itself may extend anteriorly or inferiorly to protrude into the superior recess of the lesser sac 3."