['Accurate diagnosis of melanocytic lesions is essential for the adequate clinical management of patients. Thus, thorough reporting of histopathologic parameters, especially in the initial biopsies, is a critical component of both diagnosis and staging.', 'To review current data on histopathologic prognostic factors for melanoma, with special emphasis on their use and applicability to clinical practice. Special attention is focused on the criteria highlighted by the new 2009 version of The American Joint Committee on Cancer (AJCC) system of melanoma staging and classification.', 'Published peer-reviewed literature and personal experience of the authors.'] Do an update on reporting histopathologic prognostic factors in melanoma?