Conditions
Subphrenic Abscess
Quick answer
A subphrenic abscess is a pocket of pus trapped just under the diaphragm, above the liver, stomach or spleen. It most often follows abdominal surgery, a burst ulcer or appendix, or an injury. Treatment combines antibiotics with draining the pus, usually through a thin tube placed under scan guidance, and surgery only if that fails.
Medically reviewed by The Curaventa Team · Last updated 2026-10-27
The diaphragm is the dome-shaped muscle that separates the chest from the belly. The space beneath it is a common place for infected fluid to collect after an operation or leak. Because this space is high up and hidden behind the ribs, the abscess can be missed for days.
The infection can irritate the lung base above it, so some people first notice cough, chest pain or breathlessness rather than belly pain. Left untreated, the pus can spread into the chest or bloodstream. Finding the source of infection matters as much as draining the pocket itself.
Many patients who travel for care have had drainage at home but the collection keeps coming back. In that situation the team looks for a hidden cause, such as a leak from the bowel or bile duct.
Symptoms
- Fever and chills, often days after an abdominal operation
- Pain under the right or left ribs
- Pain felt at the tip of the shoulder on the same side
- Hiccups that will not stop
- Dry cough or pain on deep breathing
- Loss of appetite and general weakness
Causes and risk factors
- Recent surgery on the stomach, liver, gallbladder, pancreas or spleen
- A perforated (burst) stomach ulcer or appendix
- Leak from a bowel join or bile duct after surgery
- Blunt or penetrating injury to the upper abdomen
- An infected liver collection that spreads outward
- Diabetes, steroid use or other causes of weak immunity
How it is diagnosed
- CT scan of the abdomen and lower chest with contrast dye
- Ultrasound, which can also guide a needle into the pocket
- Chest X-ray, which may show a raised diaphragm or fluid at the lung base
- Blood tests for infection markers, white cell count and kidney and liver function
- Testing of the drained pus to find the germ and the right antibiotic
When a procedure is needed
Surgery is considered when a guided drain cannot reach the pus, when the abscess has many separate chambers, or when it keeps returning after drainage. It is also needed when a leak or dead tissue is feeding the infection. The operation may be keyhole (laparoscopic) or open, depending on the cause.
Frequently asked questions
Why does a subphrenic abscess cause shoulder pain?
The diaphragm shares nerve supply with the skin over the shoulder. When pus irritates the diaphragm, the brain reads the signal as shoulder pain. This is called referred pain and is a useful clue for doctors.
How is the drain tube placed, and is it painful?
A radiologist numbs the skin and passes a thin tube into the pocket while watching on CT or ultrasound. Light sedation is often given. The tube stays in and drains into a small bag until the pus stops flowing.
Can I fly home with a drain still in place?
Sometimes, if the drain output is low and you have no fever. Your team will repeat a scan before deciding. Plan to stay in India until the drain is removed or a clear plan for its care at home is agreed.
What records should I bring if my abscess has come back?
Bring operation notes from your earlier surgery, all CT or ultrasound images on a disc, and any culture reports. A list of antibiotics already used helps the team choose treatment quickly.
What follow-up will I need after going home?
Expect a repeat scan a few weeks later to confirm the pocket has gone. Your local doctor should watch for returning fever or rib pain. Results can be shared with the treating team in India by video call.
Medically reviewed by The Curaventa Team. Last updated 2026-10-27. General information, not medical advice. Medical editorial board · Editorial policy · How we get prices
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