Type II: This type of Hamilton classification includes triangular areas of recession on the frontoparietal region but does not extend further than the point 3 cm anterior to a line drawn in a coronal plane between the external auditory meatuses (midcoronal line). For those whose entire anterior hairline lies high on forehead, they are included in the variant form of this type known as type IA
Type I: No bilateral recessions along the anterior border of the hairline in the frontoparietal region. Type III has not been included in this figure due to its rarity and inclusion of hair loss that are difficult to classify Hamilton classification of male-pattern hair loss. This review article aims to review different existing MPHL classifications and how it compares to each other in terms of detail, practicality, and reproducibility. We hope that this will translate to better treatment and monitoring for patients. To avoid confusion, a new classification that can balance detail, practicality, and reproducibility is required. One clinician may not accurately able to convey accurate clinical description if different classifications are used. Numerous classifications have been invented, but many variants with different levels of detail, practicality, and reproducibility may cause confusion among clinicians.
An ideal classification with high amount of detail, practicality, and reproducibility is required to accurately diagnose and monitor this condition regularly and to assess the outcome of treatment. This condition is not life threatening but needs constant treatment and monitoring, especially in recent years where male appearance is gaining significant importance in society. Male-pattern hair loss (MPHL) is a condition that affects the majority of men during adulthood.