Umbilical hernia management

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Umbilical Hernia Management

Pathophysiology & Epidemiology

Umbilical hernias result from failure of the umbilical ring to close, leaving a central fascial defect in the linea alba covered by normal skin and subcutaneous tissue. The umbilical ring is the only abdominal wall defect genetically programmed to close spontaneously.

Predisposing factors in adults:

Obesity
Multiple pregnancies
Cirrhosis with ascites
Large abdominal tumors
Male gender (peak incidence of repair ~age 60)

Associated syndromes: mucopolysaccharide storage diseases, Beckwith-Wiedemann syndrome, Down syndrome.

Differential diagnosis includes caput medusae (portal hypertension varicosities — bluish, fill with straining) and Sister Mary Joseph nodule (metastatic umbilical deposit).

Pediatric Umbilical Hernia

Feature	Detail
Defect size	Most commonly 1–2 cm
Spontaneous closure	~80% close by age 2; most by age 5
Incarceration risk	Rare; paradoxically more common in smaller defects (≤1 cm)

Indications for Surgery (Pediatric)

Incarceration or strangulation (emergency)
Failure to close by age 5
Very large or symptomatic defect in a younger child
Cosmetically distressing protrusion

Signs of Incarceration

Abdominal pain + bilious emesis + tender, hard umbilical mass → immediate exploration and repair.

Surgical Technique (Pediatric)

Outpatient, general anesthesia
Small curved infraumbilical incision in the skin crease
Sac dissected free from overlying skin
Fascial defect closed with permanent or long-lasting absorbable interrupted sutures in a transverse plane
Skin closed with subcuticular sutures
Recurrence is rare but higher in children with elevated intra-abdominal pressure (e.g., VP shunts)

— Schwartz's Principles of Surgery, 11th Ed.

Adult Umbilical Hernia

Conservative Management

Small, asymptomatic hernias → clinical surveillance is acceptable
Address underlying causes: weight loss, ascites control

Indications for Surgical Repair

Enlarging hernia
Symptomatic hernia (pain, discomfort)
Incarceration
Skin thinning or impending rupture

Surgical Options

Open repair:

Small defects: primary closure with interrupted sutures (Mayo repair — overlapping fascial repair historically used)
Larger defects: mesh repair is preferred; RCT evidence (Lancet 2018) supports mesh over suture repair for reduced recurrence

Laparoscopic repair:

A valid alternative for both primary and recurrent hernias
Associated with lower wound infection rates

Mesh placement principles:

Used when fascial edges cannot be approximated without tension
Preferred position: sublay (retromuscular/preperitoneal) — placed below the fascia and sutured to prevent migration
Intraperitoneal onlay mesh (IPOM) is also used laparoscopically

— Schwartz's Principles of Surgery, 11th Ed.; Mulholland & Greenfield's Surgery, 7th Ed.

Special Population: Cirrhosis with Ascites

This is the most challenging scenario in umbilical hernia management.

Scenario	Management
Asymptomatic, well-controlled ascites	Conservative; aggressive medical ascites management first
Liver transplant candidate	Repair at time of liver transplantation (pretransplant repair carries high morbidity/mortality)
Incarceration	Emergent repair
Thinning or ruptured overlying skin	Emergent repair
Uncontrolled ascites	Optimize (diuretics, paracentesis, TIPS) before elective repair

Rationale: High intra-abdominal pressure causes defect enlargement; skin breakdown can lead to rupture, weeping, and risk of spontaneous bacterial peritonitis.

— Schwartz's Principles of Surgery, 11th Ed.; Mulholland & Greenfield's Surgery, 7th Ed.

Summary Algorithm

Umbilical Hernia
├── Pediatric
│   ├── < 5 years, asymptomatic, small → Watchful waiting
│   └── > 5 years / large / symptomatic / incarcerated → Surgical repair
└── Adult
    ├── Small, asymptomatic → Observe (with counseling)
    ├── Symptomatic / enlarging → Elective repair (open or laparoscopic)
    ├── Incarcerated/strangulated → Emergency repair
    └── Cirrhosis + ascites
        ├── Asymptomatic → Control ascites; defer repair
        ├── Transplant candidate → Repair at transplant
        └── Emergency (rupture/incarceration) → Emergent repair

Key Evidence Point: A randomised double-blind multicentre trial (Lancet 2018) demonstrated that mesh repair is superior to suture repair for umbilical hernias in adults, with significantly lower recurrence rates.

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