this is a picture out of a book, the reproductive husbandry of pythons and boas. this is exactly what it says under the photo
A Timor python with an abdominal mass simulating mature ovarian follicles.This snake was found to have an adenocarcinoma(malignant tumor)of the colon. It had been treated with metronidazole (Flagyl), an amebicide known to produce malignant tumors in mice. During a program to eradicate amebiasis at the IHR using this medication,three pythons developed these tumors.
i hope this helps if you need more info you should try to get your hands on this book, its old but has alot of good information in it
Joe & Melissa Burch