Book excerpt: Hair Pathology with Trichoscopic Correlations Mariya Miteva, MD, Associate Professor, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA Combining pathology with trichoscopy is a powerful strategy for the optimal management of hair disorders. This highly illustrated text will help clinicians become familiar with how to obtain an optimal specimen and how to understand the pathology report in order to create an individualized approach in management. Pathologists will become familiar with the trichoscopic morphologic correlation of hair disorders, with the diagnostic clues to spot, and the most common pitfalls in hair pathology. CONTENTS: Hair and scalp dermoscopy (trichoscopy): An introduction * Normal scalp and hair on trichoscopy * Practical tips for mastering the scalp biopsy procedure * Introduction to horizontal sections and normal scalp anatomy on horizontal sections * Trichoscopy-guided scalp biopsy * Clues to the pathologic diagnosis of hair disorders * Pitfalls in the pathologic diagnosis of hair disorders * Alopecia areata * Alopecia areata incognita * Telogen effluvium * Androgenetic alopecia * Traumatic alopecia (without traction alopecia) * Lichen planopilaris * Frontal fibrosing alopecia * Fibrosing alopecia in a pattern distribution * Lupus erythematosus of the scalp * Traction alopecia * Central centrifugal cicatricial alopecia (CCCA) * Folliculitis decalvans * Dissecting cellulitis of the scalp * Erosive pustular dermatosis of the scalp * Acne/Folliculitis keloidalis * Scalp psoriasis * Seborrheic dermatitis * Red scalp disease * Scalp involvement in dermatomyositis * Linear morphea en coup de sabre * Hair and scalp infections * Miscellaneous * Trichoscopy in the hair transplant practice: An introduction for hair restoration surgeons and pathologists