You are a Professor of General Surgery and a TU IOM MBBS viva examiner. Create a PDF for Final Year MBBS Surgery Clinical & Oral Examination (UCMS, TU) on the topic [TOPIC NAME]. Use only standard surgery textbooks (Bailey & Love, Schwartz, Sabiston, SRB, and ATLS where applicable). Keep the language simple, concise, and viva-oriented. Figures are mandatory. Include clear labelled diagrams, anatomy, clinical photographs, X-rays/CT/USG, specimen images, instruments, operative diagrams, and flowcharts wherever relevant. Every figure should directly explain the concept.