The textbook "Anatomical Variations of Parathyroid Glands and Their Clinical Impact" offers a comprehensive morphological study of the parathyroid glands conducted in surgical series. It highlights the challenges in identifying these glands and presents standardized techniques that enable consistent identification. The study demonstrates the significant variability in the shape, number, and location of the parathyroid glands, as well as their relationships with adjacent vascular and nervous structures. These findings are crucial for surgeons to understand the anatomical conditions, thereby enabling safe and successful procedures on the thyroid and parathyroid glands. The book relies on embryological developments to present a clearly defined model of the anatomical distribution of the parathyroid glands and emphasizes the necessity of a solid anatomical knowledge for performing complication-free surgeries.