This case study analyzes the post-operative care of a 63-year-old patient named Jack who underwent surgery for left-sided colon cancer. The analysis, conducted by a nursing student, focuses on gathering further information about the patient's condition, identifying immediate and short-term problems, and applying the clinical reasoning cycle to guide diagnosis and treatment. The student proposes physical assessments, diagnostic tests like CT scans and CEA, and addresses immediate issues such as high blood glucose and low blood pressure, along with potential complications like diarrhea, constipation, and calcium/Vitamin D deficiencies. The analysis incorporates relevant literature and research to support the assessment and proposed interventions, emphasizing a holistic approach to patient care and the application of the Levett-Jones clinical reasoning cycle for effective diagnosis and problem-solving.