Linea Alba Hernia
The most likely diagnosis is a linea alba hernia, which presents as a palpable cord-like or mass-like structure along the midline between the xiphoid process and umbilicus, and requires surgical evaluation to prevent complications such as incarceration or strangulation.
Clinical Reasoning
A cord-like structure palpable from the xiphisternum down the right side of the linea alba is characteristic of a linea alba hernia. These are relatively uncommon hernias that manifest as small protrusions in the linea alba between the umbilicus and xiphoid cartilage 1. The "cord-like" quality you're palpating likely represents:
- Herniated pre-peritoneal fat
- Omentum protruding through a fascial defect
- Potentially the hepatic round ligament (especially given the right-sided location)
Key Diagnostic Features
The right-sided location along the linea alba is particularly noteworthy. While linea alba hernias typically occur in the midline, herniation involving the hepatic round ligament can present as a palpable mass or cord-like structure extending from the xiphoid region 1. In the reported case, a patient presented with upper abdominal pain and a mass in the upper midline that was found to be a linea alba hernia involving fibrolipoma of the hepatic round ligament 1.
Diagnostic Workup
Obtain abdominal CT imaging immediately to:
- Confirm the fascial defect in the linea alba
- Identify hernia contents (fat, omentum, round ligament, or bowel)
- Measure the defect size (typically 20mm or larger)
- Rule out incarceration or strangulation
CT will show adipose tissue protruding from the abdominal wall, potentially contiguous with the hepatic round ligament 1.
Management Algorithm
Surgical repair is indicated because:
- Linea alba hernias do not resolve spontaneously
- Risk of incarceration and strangulation increases over time
- Mesh repair of the fascial defect provides definitive treatment 1
Surgical approach:
- Identify and open the hernial sac
- Reduce or resect the herniated contents
- Repair the linea alba defect with mesh reinforcement
- Send any resected tissue for histopathology
Important Pitfalls to Avoid
Do not mistake this for xiphodynia, which presents with tenderness over the xiphoid process itself but would not present as a palpable cord-like structure extending down from the xiphoid 2, 3. Xiphodynia is a pain syndrome, not a structural abnormality with a palpable mass.
Do not delay imaging or surgical referral - while the patient may be asymptomatic or have minimal symptoms now, linea alba hernias can progress to bowel incarceration requiring emergency surgery with significantly higher morbidity.