What is the definition of a patch in dermatological terms?

In dermatological terms, a patch is defined as a flat lesion that measures greater than 1 cm in diameter. This definition is important because it helps clinicians differentiate between various types of skin lesions based on their size and the characteristics they exhibit.

Flat lesions under 1 cm are typically referred to as macules, so understanding the distinction based on size is crucial for accurate diagnosis and documentation in clinical practice. By identifying a lesion as a patch, healthcare providers can correlate it with other descriptors and characteristics to assess potential conditions or dermatological concerns. Recognizing these definitions is essential in the context of a comprehensive physical assessment.