Umbilical and Paraumbilical Hernia
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Direct answer
In children the umbilical hernia is a congenital defect of the umbilical ring that most close spontaneously by 3–5 years of age, so surgery is reserved for defects persisting beyond about 4–5 years, a defect larger than roughly 1.5–2 cm, or complications. In adults the swelling is usually a paraumbilical hernia through the linea alba beside the umbilicus, driven by raised intra-abdominal pressure from pregnancy, ascites, obesity or chronic cough, and it carries real strangulation risk in cirrhotic patients with tense ascites. Small adult defects may be closed primarily, but mesh repair is preferred for larger (commonly over 3–4 cm), recurrent or complicated hernias; the classical Mayo 'vest-over-pants' overlapping repair is now considered to have higher recurrence than mesh.
What you must remember
- Childhood umbilical hernias close spontaneously in the great majority by 3–5 years; strangulation before school age is uncommon.
- Adult paraumbilical hernia is acquired through a weak linea alba and is strongly associated with raised intra-abdominal pressure — ascites, pregnancy, obesity, COPD and chronic constipation.
- Cirrhotic ascites is the high-risk setting: thin skin, leak or rupture, and strangulation; control ascites medically (diuretics, salt restriction) before definitive repair, with TIPS or shunt surgery in selected patients.
- Sac contents are commonly omentum, transverse colon or small intestine; a Richter-type entrapment occurs, and strangulation presents as an irreducible, tender periumbilical lump.
- Repair options: primary suture repair for small defects, mesh (sublay preferred) for large, recurrent or complicated hernias; laparoscopic repair is used in selected patients.
- The Mayo repair overlaps the fascial edges like a 'vest over pants'; historically popular, recurrence is higher than with mesh in most modern series.
- Epigastric hernia is the related midline defect through the linea alba above the umbilicus, often containing only preperitoneal fat, presenting as a tender nodule and prone to incarceration of fat.
Common confusion
The exam contrasts the child and the adult. Parents of a 1-year-old with a small umbilical lump need reassurance, not surgery, whereas an adult with a firm periumbilical lump and vomiting needs urgent assessment for strangulation. The second trap is paraumbilical versus epigastric versus umbilical: paraumbilical sits just beside the umbilicus through the linea alba, epigastric is above it, and a true umbilical defect is through the ring itself.
Exam-focused takeaway
Facts tested: spontaneous closure age, the size threshold for operating in children, the association with ascites and the emergency of a leak in cirrhosis, and the Mayo repair by name. A stem may show a cirrhotic with a painful irreducible periumbilical swelling asking the next step — resuscitation and surgery with ascites control — or ask which hernia in an adult is most often repaired with mesh. Learn epigastric hernia as a distinct entity because it appears frequently as a short one-liner.
Frequently asked questions
When is surgery indicated for a child's umbilical hernia?
If the defect persists beyond about 4–5 years of age, exceeds roughly 1.5–2 cm, is progressively enlarging, or becomes symptomatic or complicated.
Why is umbilical hernia dangerous in cirrhosis with ascites?
Tense ascites stretches the defect and thins the overlying skin, leading to leakage, skin ulceration and a high risk of strangulation and spontaneous rupture with peritonitis.
What is the Mayo vest-over-pants repair?
A historical technique overlapping the upper fascial edge over the lower like a vest over trousers; still asked in exams but largely replaced by mesh repair due to higher recurrence.
How are large adult paraumbilical hernias repaired?
With mesh, preferably in the sublay/retromuscular plane, after correcting the precipitating factor such as obesity or ascites to lower recurrence.