What is the main characteristic of a nodule?

A nodule is primarily characterized by being a solid, round, or oval structure that is larger than 1 cm in diameter. This definition includes its firmness and size, differentiating nodules from other types of lesions such as cysts, which may be soft and fluid-filled or smaller in size. The solid nature of nodules is crucial, as it indicates that they can represent various medical conditions, such as benign growths or tumors that can arise in different tissues of the body.

The characteristics of size and texture are essential for proper diagnosis and management. Nodules are often assessed through imaging studies or biopsy to determine their nature. Understanding the definition of a nodule helps in distinguishing it from other medical terms related to lumps or bumps, enhancing the assessment and treatment decisions in clinical settings. The criteria regarding size and solid composition are fundamental in identifying and discussing nodules in medical practice.