Which statement best characterizes a case report?

• A. A study comparing outcomes of two groups
• B. Systematic review of the literature
• C. An in-depth description of an individual's condition or response to treatment
• D. A survey of a population's health behaviors

Answer: (C)

A case report is an in-depth description of an individual's condition or response to treatment. It focuses on detailed clinical features, diagnostic steps, management, and outcomes for a single patient (or a small number of patients), often highlighting a unique or unusual finding. Because it provides rich narrative data without a comparison group or statistical analysis, its strength lies in detailed clinical insight rather than generalizable conclusions. This sets it apart from a study that compares outcomes between two groups, a systematic review that synthesizes findings from many studies, or a population survey that describes health behaviors across a broad group.