Textbook of Laboratory Medicine Clinical Procedures Volume 1 (A–F) is a definitive reference covering over 120 essential diagnostic tests, designed to help professionals master clinical interpretation while avoiding legal and procedural pitfalls. It brings together hormone panels, tumor markers, autoimmune assays, endocrinological diagnostics, and metabolic evaluations, each supported by clear clinical indications, standardized collection protocols, interpretation guidance, and medico-legal safeguards. From managing endocrine disorders and screening newborns for congenital adrenal hyperplasia to interpreting clotting profiles, urinary hormones, and liver enzymes, the book provides evidence-based, compliance-ready procedures. It addresses common sources of error such as improper timing, specimen handling, reference range misuse, and documentation gaps, while highlighting pitfalls that lead to misdiagnosis and liability. Written for clinical pathologists, endocrinologists, laboratory teams, forensic and compliance professionals, postgraduate students, and institutional libraries, this 474-page, 7×10-inch volume follows a uniform structure covering background, indications, considerations, collection, reference ranges, interpretation, medico-legal aspects, and references, ensuring that every test is performed and defended scientifically, clinically, and legally.