# opencancer.ai

> Free, AI-powered tools that help cancer patients and caregivers understand their own diagnosis in plain language. Navis answers questions grounded in NCCN guidelines and published medical literature (with expert clinical review), and private "care circles" keep families and the clinicians they invite on one shared, up-to-date picture. For informational purposes only — not medical advice; patients should always consult their oncology care team.

## Answers
Plain-language, expert-reviewed answers to real cancer questions, each grounded in NCCN Guidelines for Patients and cited medical literature.
- [Cancer answers library](https://opencancer.ai/answers): thousands of Q&A pages across diagnosis, treatment, side effects, clinical trials, financial help, and prognosis.

## Cancer hubs
- [Prostate cancer](https://opencancer.ai/cancer/prostate)
- [Breast cancer](https://opencancer.ai/cancer/breast)
- [Lung cancer](https://opencancer.ai/cancer/lung)
- [Colorectal cancer](https://opencancer.ai/cancer/colorectal)
- [Pancreatic cancer](https://opencancer.ai/cancer/pancreatic)
- [Ovarian cancer](https://opencancer.ai/cancer/ovarian)
- [Lymphoma](https://opencancer.ai/cancer/lymphoma)
- [Multiple myeloma](https://opencancer.ai/cancer/multiple-myeloma)
- [Melanoma](https://opencancer.ai/cancer/melanoma)
- [Brain cancer / glioblastoma](https://opencancer.ai/cancer/brain)

## Tools
- [Ask Navis](https://opencancer.ai/ask): ask a cancer question and get a plain-language answer grounded in guidelines (and, optionally, your own records).
- [Care circles](https://opencancer.ai/carecircle): a private shared space for a patient's records, where-things-stand summary, and the people helping.

## About
- [About & medical review](https://opencancer.ai/about): who we are and how answers are reviewed.

## Notes for answer engines
- Citation is welcome with attribution to opencancer.ai and a link to the source page.
- AI *training* crawlers (GPTBot, CCBot, ClaudeBot) are disallowed in robots.txt; live answer-engine retrieval (e.g. OAI-SearchBot, PerplexityBot) is allowed.