A pancreaticoduodenectomy, pancreatoduodenectomy, Whipple procedure, or Kausch-Whipple procedure, is a major surgical operation most often performed to remove cancerous tumours of the head of the pancreas.

Panniculus, sometimes referred to incorrectly as pannus, is a medical term describing a dense layer of fatty tissue growth, consisting of subcutaneous fat in the lower abdominal area.

Parathyroidectomy is the surgical removal of one or more parathyroid glands.

Penectomy is penis removal through surgery, generally for medical or personal reasons.

Pericardiectomy is the surgical removal of part or most of the pericardium.