When to talk to a doctor

This page is general information, not a diagnostic tool.

Having a symptom listed on this site does not mean you have cancer — most causes of most symptoms are not cancer. Nothing here can or should be used to diagnose yourself or anyone else.

Persistent or worsening symptoms should always be evaluated by a doctor in person. OncologyIstanbul's own role begins after that — once you already have a diagnosis, test results, or a specific medical concern a doctor has raised — coordinating a free 72-hour tumor-board second opinion in Istanbul. We do not diagnose, and this page is not trying to.

Every cancer case is individual. Assessments are based on the reports you provide and do not replace in-person examination. Survival statistics are population-level data, not personal predictions.

Choose the type of cancer closest to a diagnosis or concern you or a doctor already have in mind. Each page lists a few standard, well-established reasons a second-opinion conversation makes sense — not an exhaustive checklist.

Breast cancer

When to consider a second opinion for breast cancer

GI (digestive) cancers

When to consider a second opinion for gi (digestive) cancers

Lung cancer

When to consider a second opinion for lung cancer

Prostate cancer

When to consider a second opinion for prostate cancer

Gynecologic cancers

When to consider a second opinion for gynecologic cancers

Brain tumors

When to consider a second opinion for brain tumors

Blood cancers (leukemia, lymphoma)

When to consider a second opinion for blood cancers (leukemia, lymphoma)

Already have a diagnosis or a doctor's concern in hand? Start a free 72-hour second opinion →