A stomach tumor appeared smaller after infection treatment – inflammation, not tumor.

Doctors treated an 85-year-old man who had low iron levels caused by blood loss. Inside his stomach, they found a large noncancerous nerve tumor, called a schwannomaschwannomaA rare, usually non-cancerous tumor that grows from the cells that cover nerves., covered in sores. It sat alongside an infection of Helicobacter pyloriHelicobacter pyloriA type of bacteria that infects the stomach lining and can cause ulcers and inflammation., a common gut bacteria that triggers swelling and tissue damage. Surgery was suggested, but the patient chose not to have it. Instead, doctors gave him medicine to clear the bacterial infection. Six months later, a follow-up camera exam showed that the sores had healed and the tumor looked visibly smaller. The researchers suggest that swelling and ulcers linked to this bacterial infection can make a stomach tumor look much bigger than it truly is on an initial exam.

Why it matters

For patients with rare stomach tumors, an ongoing H. pylori infection can make the tumor look bigger due to surrounding inflammation. This case warns that treating the infection might make the tumor appear smaller, but that doesn't mean the tumor itself shrank. Doctors should follow up with deeper scans before making decisions about surgery.

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