Appendix cancer mucus therapy is an experimental treatment that uses two drugs to dissolve the thick mucus that mucinous appendix cancer and pseudomyxoma peritonei leave behind in the belly. A specialist gives it through a catheter, not by mouth, and early human results show it can shrink mucus deposits and ease symptoms in people whose disease cannot be removed by surgery.

The mucus is the hardest part of this cancer to deal with. In mucinous appendix tumors and pseudomyxoma peritonei, the cancer cells make a thick jelly that fills the abdomen, presses on the organs, and coats the tumors so it is much harder for chemotherapy to reach them. Surgery to clear it, called cytoreductive surgery with heated chemo (CRS/HIPEC), is still the main treatment when the disease can be removed. For some people it cannot be removed, and the mucus keeps coming back. Researchers have spent the past several years trying to solve that problem by dissolving the mucus instead of only removing it during surgery.

What appendix cancer mucus therapy is

The treatment combines two substances. One is bromelain, an enzyme from pineapple. The other is N-acetylcysteine, or NAC, which doctors already use to thin mucus. On their own, at the doses you can buy in a store, neither drug has shown it can dissolve this cancer’s mucus the way the concentrated BromAc combination does in the research. Combined, concentrated, and placed directly onto the tumor, they break the mucus down into a liquid that can be drained out. In the research this combination is called BromAc. It is still investigational. The FDA and other major regulators have not approved it as a standard treatment for appendix cancer.

What the research shows

Researchers first tested the approach in the laboratory. In 2020, a team at the University of Pittsburgh tested the two-drug combination on mucinous appendix cancer tissue and in mouse and rat models. The mucus dissolved, the solid tumor turned into a drainable liquid, the tumor bulk shrank, and chemotherapy worked better once the mucus coating was gone. That work was done in animals and lab tissue, not in people.

Since then the therapy has moved into patients. A first safety study in Sydney gave the drug combination into the abdomen of people with pseudomyxoma peritonei through a drain. It did not harm the liver, the kidneys, or blood clotting. There was a short burst of inflammation after each treatment, which the researchers expected.

The most recent report brings it back to Pittsburgh, the same group that ran the early lab work. In 2026 they published results from an expanded-access program in people with appendiceal pseudomyxoma peritonei that could not be removed with surgery. A radiologist placed a small catheter into each mucus deposit using imaging for guidance. The drug combination sat in the tumor for about a day, then the dissolved mucus was drained out, and the process was repeated up to six times per deposit. Most of the treated deposits got smaller, on average by roughly half. A large amount of mucus was drained. More than half of the patients who were asked reported that their symptoms improved.

These were people with very advanced disease. The goal of the treatment is to reduce the mucus and ease symptoms, not to cure the cancer. Most side effects were mild to moderate. Some were more serious. Anything delivered straight into a tumor carries risk, which is one reason it is done by a specialized team.

One point matters here. This therapy is aimed at the mucus, not the cancer cells themselves. Dissolving the mucus clears bulk, and in laboratory studies it let chemotherapy work better once the coating was gone. On its own, BromAc is not considered a cancer-killing drug. It clears the way. It is not the treatment that kills the tumor.

Don’t try this at home

Both drugs in this therapy are sold as supplements. That makes it tempting to think you could get the same result at home. You cannot, and trying could hurt you.

In every study, the drugs were concentrated far beyond a supplement, mixed in a specific ratio, and delivered straight into the tumor by a specialist, and then the mucus was drained. Swallowing bromelain capsules or NAC from a store is not the same treatment. There is a single published case where the drugs were given by mouth to one patient. One patient is not proof that it works or that it is safe, and even that was done under a doctor’s care. Do not start bromelain or NAC on your own to treat this cancer. Talk to a peritoneal-surface specialist first.

Who this might help

Appendix cancer mucus therapy is aimed at one specific problem, the mucus, so it fits some patients and not others. This research is about mucinous disease, the kind that makes the jelly-like mucus. That means mucinous appendix cancer and pseudomyxoma peritonei. It is being studied first in people whose disease cannot be removed with surgery, when the mucus keeps building up and causing symptoms. If your disease can be removed, cytoreductive surgery, with heated chemo where appropriate, is still the standard first treatment for suitable patients under the 2025 Godfrey consensus guidelines, not this therapy.

Appendix cancer is not one disease. Goblet cell adenocarcinoma, signet ring cell cancer, and neuroendocrine tumors of the appendix do not make the same mucus and were not the focus of this work. Grade matters too, and low-grade and high-grade mucinous disease can behave differently. The studies so far are small, and one of them was an expanded-access program rather than a randomized trial. This is a promising direction, not a settled treatment.

If you want to know whether a mucus-dissolving trial or an expanded-access program is open to you, ask a peritoneal-surface specialist, and use the Appendicure Trial Finder to see what is enrolling. It matches on your cancer’s biology, not just its name. If a hospital has already told you your disease is unresectable, it is also worth reading why “unresectable” is not always the final word.

Common questions

What is appendix cancer mucus therapy?

It is an experimental treatment that uses a concentrated mix of bromelain and N-acetylcysteine, delivered directly into a tumor by a specialist, to dissolve the thick mucus made by mucinous appendix cancer and pseudomyxoma peritonei so it can be drained out.

Can I just take bromelain and NAC supplements at home?

No. The studies used concentrated drug doses injected straight into the tumor, not pills. Store-bought supplements are not the same treatment and could be harmful. Talk to a peritoneal-surface specialist before taking anything.

Is it a cure?

No. In the studies so far it reduced the mucus and eased symptoms in people with advanced, unresectable disease. It is not a cure, and it does not replace surgery when the disease can be removed.

Does BromAc kill the cancer?

Not on its own. It mainly dissolves the mucus. Laboratory studies suggest that clearing the mucus may let chemotherapy work better, but BromAc by itself is not considered a cancer-killing drug.

Who can get it?

It is being studied mainly in people with mucinous appendix cancer or pseudomyxoma peritonei that cannot be removed with surgery. It is investigational, offered through trials and expanded-access programs at some specialized centers. A peritoneal-surface specialist or the Appendicure Trial Finder can tell you what is open to you.

Does it replace CRS and HIPEC?

No. When mucinous appendix disease can be removed, cytoreductive surgery with heated chemo where appropriate remains the standard first treatment for suitable patients under the 2025 Godfrey consensus guidelines.

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