A spigelian hernia develops in an area where there are weakened abdominal muscles. Tissues or organs then protrude through what’s termed the spigelian fascia. Risk factors associated with this type of hernia include being overweight, having COPD or similar conditions that result in chronic coughing, experiencing abdominal trauma, pregnancy, and frequent bowel straining.
Because it’s usually difficult to confirm the existence of a spigelian hernia from a physical examination alone, image testing is typically necessary to make a positive diagnosis. This usually involves an abdominal ultrasound or CT scan. A spigelian hernia is also sometimes detected when abdominal or pelvic surgery is performed for another reason, during exploratory surgery, or when a colonoscopy is performed as part of a routine colon cancer screening.