Sytse's account appears at the primary source https://sytse.com/cancer/ (citation: https://sytse.com/cancer/). The page is titled "Founder of GitLab battles cancer by continuing to found companies" and presents his direct description of managing diagnosis and treatment alongside entrepreneurial work.

The post was submitted to Hacker News at https://news.ycombinator.com/item?id=47556729 where it reached 193 points and received 47 comments (citation: https://news.ycombinator.com/item?id=47556729). No other sources are cited in the provided material.

All details are taken exclusively from the listed primary URL and its Hacker News metadata; no additional documents or external reporting are referenced.