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Principles for FRCS (Gen Surg)

This domain is the part of general surgery that every other domain rests on. It covers preoperative assessment and enhanced recovery, nutrition and intestinal failure, sepsis, fluids and critical care, thromboprophylaxis and anticoagulation, blood products, the biology and staging of cancer and the principles of systemic and radiotherapy, the hereditary cancer syndromes, skin lesions and soft-tissue infection, and the spleen. It also covers the professional curriculum the JCIE examines: statistics and study design, critical appraisal, consent, capacity, safeguarding, the law, patient safety, audit and supervision. The JCIE’s own sample questions include several items from this area, and it is the domain candidates most often under-revise.

175 questions in the bank · 4 topics Updated 12 November 2026

Topics in this domain

  • Perioperative care, nutrition & critical care50
  • Oncology & genetics for surgeons25
  • Statistics, research, ethics & law75
  • Skin, soft tissue & the reticulo-endothelial system25

What the paper tends to test

  • Statistics questions ask you to choose the right test or graph for the data, interpret a confidence interval or a p value, recognise a type I or type II error, or say what a power calculation needs.
  • Study design questions turn on bias: randomisation, allocation concealment, blinding and intention-to-treat analysis.
  • Consent and capacity questions are set to UK law and GMC guidance — Montgomery, the Mental Capacity Act, Gillick competence and the young person who refuses treatment.
  • Nutrition questions test refeeding syndrome, the indications for parenteral nutrition and the management of a high-output stoma or fistula.
  • Professional questions ask what a consultant should do about a struggling trainee, a colleague’s performance or a patient-safety incident.

Classic traps and discriminators

  • Sensitivity and specificity belong to the test; predictive values change with the prevalence of the disease in the population tested.
  • A type I error is a false positive; a type II error is a false negative, and an underpowered study is the usual reason for one.
  • Gillick competence lets a young person under 16 consent; it does not mean their refusal of life-saving treatment must always be accepted.
  • Refeeding risk is highest in patients who have eaten little for days, not only in the visibly malnourished — start feeding cautiously and replace phosphate, potassium and magnesium.

Free principles practice questions

From the free sample — original, referenced, with the full explanation. Rate your confidence first.

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A 59-year-old man with type 2 diabetes attends preoperative assessment before an elective incisional hernia repair with mesh.

UK perioperative guidance advises that elective surgery should be deferred and glycaemic control optimised if his HbA1c is at or above which value?

How sure are you?
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A GP in England refers a 62-year-old man with rectal bleeding and a positive faecal immunochemical test on the urgent suspected colorectal cancer pathway.

Under the current NHS England cancer waiting time standards, within how many days of referral should he be told that he has cancer, or that cancer has been excluded?

How sure are you?

Principles questions, answered

Does FRCS (Gen Surg) Section 1 really test statistics and ethics?

Yes. The syllabus includes research, ethics, consent, safety and supervision as generic professional capabilities, and the JCIE’s sample questions include statistics, study design, consent and professional-conduct items. They are quick marks for a candidate who has revised them.

Does the JCIE say how much of the paper comes from this domain?

No. The JCIE publishes a syllabus blueprint but no question weightings. The share of our bank given to this domain is an editorial judgement of its breadth, not an official figure.

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