Understanding your blood test report

A chemotherapy blood report is usually made up of a few standard panels. The complete blood count shows your white cells, red cells, haemoglobin and platelets. The kidney panel shows creatinine, urea and salts such as sodium and potassium. The liver panel shows liver enzymes, often written as SGPT or ALT and SGOT or AST, along with bilirubin, albumin and alkaline phosphatase. Depending on your treatment, the report may also include blood sugar, magnesium, calcium, uric acid, thyroid tests or tumour markers.

Each line typically shows the test name, your result, the unit of measurement, and a reference range printed by the lab. Results outside that range are often marked in bold, with an H for high or an L for low. This page explains how the report is organised so it feels less confusing. It cannot interpret your own results. A value flagged outside the range can be expected and harmless during chemotherapy, while a value inside the range can still matter for your treatment. Only your treating team can judge what a result means for you, alongside your symptoms, your medicines and your previous reports.

Reference ranges are not treatment limits

The printed range describes healthy adults tested at that lab. Your team uses its own limits, set for your treatment, to decide whether chemotherapy can go ahead safely.

Trends matter more than one result

A single result is a snapshot. Your team looks at how numbers change from cycle to cycle, which is why keeping every report together is so useful.

Timing affects the numbers

Blood counts are often lowest in the middle of a cycle and recover before the next one, so a result depends on the day it was taken.

It cannot tell you whether any of your own results are good, bad, safe or dangerous. Interpreting a result needs your full picture: the medicines you are on, the day of your cycle, your symptoms, earlier results and your other health conditions. A result that looks alarming on paper may be expected, and one that looks normal may still lead your team to act.

It also cannot tell you whether your next cycle will go ahead or whether your dose should change. Those decisions belong to your oncologist, who uses limits set for your specific treatment rather than the lab reference range.

Why online searches mislead

Websites describe results in healthy people or in diseases unrelated to your treatment. Reading them often causes needless fear. Ask your team instead.

Different labs, different ranges

Reference ranges and units vary between labs. Comparing a result from one lab with a range from another can give the wrong impression.

Photos of reports help

Take a clear photo of each report so a copy is always on your phone, including when you travel or need emergency care.

Keep reports in order

A folder in date order lets your team see trends at a glance and saves time at appointments.

Share reports from other hospitals

If tests were done elsewhere, bring the original reports, not only a verbal summary of the numbers.

Ask what matters most for your treatment

It is reasonable to ask your team which two or three results they watch most closely for your medicines, so you know what the key checks are.

Family members can help

A relative can keep the folder, note questions and come to appointments, which is especially helpful when you feel tired or unwell.

Results do not replace how you feel

Tell your team about symptoms even when the last report was reassuring. Things can change quickly between tests.

Do not change medicines based on a report

Never stop, start or change any medicine, supplement or diet because of a number on a report without advice from your team.

Ask for explanations in plain words

If a doctor uses terms you do not understand, it is fine to ask them to explain again in simpler language, or to write it down.

What to do next

Keep every report together in date order and photograph each one. Note flagged values and questions, take them to your team rather than searching online, and act on symptoms straight away whatever the last report showed.