What is the defining feature of a nodule compared to other skin lesions?

The defining feature of a nodule compared to other skin lesions is its size. Nodules are typically larger than papules and are solid, raised formations that can vary in depth. Their size distinguishes them from other types of skin lesions that may be flat or very small. While color, consistency, and position on the body can vary widely among different types of skin lesions, it is the size of the nodule that specifically sets it apart as a distinctive classification in dermatological terms. This characteristic makes nodules a significant focus in clinical assessments, as their size often influences their diagnosis and treatment options.