Ventral hernias occur in the anterior abdominal wall and include primary ventral hernias (eg, epigastric, umbilical, Spigelian, lumbar hernias) and most incisional hernias (including parastomal hernias). Incisional hernias can develop anywhere an incision has been made but most commonly occur at the midline, given that midline incisions are most commonly used during laparotomies.
Source: Uptodate
