APPENDICURE

I’ve been asked a lot recently about oral bromelain and NAC, short for N-acetylcysteine, for low-grade appendiceal mucinous neoplasm, or LAMN, and pseudomyxoma peritonei, or PMP. The question I usually get is whether taking them by mouth can dissolve the mucin and help someone avoid surgery. I read the real studies. What holds up is narrower than it looks online, and one detail matters more than the rest.

What bromelain and NAC actually are

Bromelain is an enzyme that comes from the stem of a pineapple. NAC is a compound better known for treating acetaminophen overdose. Together, they can break down mucin, the thick jelly that appendix cancer and PMP produce. The combination is called BromAc. An Australian company has studied it for years.

The difference that matters

BromAc is not a pill. In the studies, it is placed straight into the tumor or into the belly through a small drain, guided by imaging. A doctor puts the drug right where the mucin is. That’s the key difference. Swallowing capsules doesn’t get the medication directly into the mucin inside the abdomen the way the injected treatment does.

Where the oral story comes from

Much of the excitement around taking bromelain and NAC by mouth comes from a single published case report. A doctor in Germany was diagnosed with PMP from a LAMN. His tumor board recommended cytoreductive surgery with HIPEC. He turned it down. He wanted something less invasive, so he took bromelain and NAC capsules on his own and tracked himself with regular MRI scans. His scans stayed stable for four years, and he published the case. That is one man running an experiment on himself. It is not a clinical trial, and it is not proof that oral capsules work. You can read that case report here.

What the real evidence shows

The evidence we do have is for the injected version. In an early trial, twenty people with mucinous tumors were treated by injecting BromAc into the tumor. About three quarters of the treated sites responded, and the side effects were manageable. Most of these people were not able to have surgery. Injected BromAc has also received orphan drug designation from the FDA and the European Medicines Agency, a status given to promising treatments for rare diseases. That designation is for the injectable drug, not for supplements you buy off a shelf. The trial in people who were not surgical candidates is written up here.

What this means for you

BromAc is real and worth watching. It may become an option for people who cannot have surgery. It is not a reason to skip surgery. The standard of care for LAMN and PMP is still cytoreductive surgery with HIPEC, and the 2025 Godfrey consensus guidelines support that.

If you have seen a treatment claim in one of the groups and you are not sure what to make of it, you are not alone. Bring it to your care team. The registry is one way we pool what patients are actually going through, so the community learns from real data instead of a single anonymous post.

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