Application of scalp pathological biopsy in diagnosis and treatment of alopecia

Alopecia is a common disease in dermatologic clinics. The diagnosis of some hair diseases does not rely on pathological examinations, and with the development of science and technology, the role of many new non-invasive detection instruments, such as dermoscopy, hair scanners and skin CT, is increasingly valued in the diagnosis and treatment of hair diseases. However, the role of pathological examination is still irreplaceable. Because of the particularity of hair diseases, hair pathology differs from common skin pathology in the aspects of scalp biopsy sites, biopsy methods and techniques, tissue-slicing methods and pathological report content. This review systematically discusses the role of scalp pathological biopsy in the diagnosis and treatment of alopecia. Key words: Alopecia; Hair pathology; Biopsy