MRCS Part B OSCE Explained: Stations, Timing and How It Is Marked

The MRCS Part B is the clinical half of the Membership of the Royal Colleges of Surgeons exam. It is an OSCE (Objective Structured Clinical Examination): you move around a circuit of short stations, and at each one an examiner marks you against a structured mark sheet. This guide explains how the circuit is organised and what that means for your preparation.

Who can sit Part B?

You need to pass MRCS Part A, the written exam on applied basic sciences and principles of surgery, before you can book Part B. The exam is set jointly by the surgical Royal Colleges (the Intercollegiate MRCS) and is held in the UK and at overseas centres, including Cairo.

Two domains: applied knowledge and applied skills

The stations fall into two groups:

• Applied knowledge: anatomy, surgical pathology, and applied surgical science and critical care. Expect prosections, images and specimens, and a structured discussion with the examiner.
• Applied skills: clinical examination, procedural skills, history taking and communication (giving and receiving information, including phone calls and difficult conversations).

You must pass both domains. A brilliant anatomy score cannot rescue weak communication stations, and the reverse is also true, so balanced preparation matters.

Timing

Each station is short: around nine minutes, with a minute beforehand to read the candidate instructions. The circuit has roughly 17 to 18 examined stations, plus preparation and rest stations, and the whole exam takes about three and a half hours. The colleges adjust the format from time to time, so always check the current details on the Intercollegiate MRCS website before your exam.

How the stations are marked

Each examiner scores you against a structured mark sheet for the station and also records an overall judgement of your performance. In practice that means two things:

• Structure earns marks. A clear, systematic approach (introduce yourself, confirm the patient, gain consent, follow a logical order, summarise) picks up points that a disorganised but knowledgeable answer misses.
• Safety is non-negotiable. Unsafe actions or advice, such as missing a red flag, failing to escalate or ignoring consent, can sink a station on its own.

What this means for your preparation

1. Practise against the clock. Nine minutes goes quickly. Rehearse every station type with a timer until your structure is automatic.
2. Give communication the same time as anatomy. History taking, information giving and phone calls are skills, and skills need practice out loud.
3. Get examined before the exam. A mock with real examiners shows you how your performance is scored, not just how much you know.

How VA Academy can help

Our free OSCE lecture series works through every station type with Royal College examiners, and our one-to-one mock stations let you practise any scenario with an examiner on Zoom. Before each exam sitting we also run full hands-on mock exams in Cairo, with 16 selected OSCE stations and immediate feedback from the examiners.