Non-Neoplastic Disorders of Bone Marrow is devoted to the evaluation and interpretation of bone marrow and peripheral blood specimens where non-neoplastic disorders can often mimic malignant conditions. Because these processes frequently require the integration of subtle morphologic clues with the clinical context, this practical, morphologically-grounded resource focuses on the spectrum of acquired non-neoplastic processes, selected clonal conditions, and congenital disorders. The volume is organized by etiology—addressing autoimmune diseases, metabolic disorders, nutritional deficiencies, and the effects of toxins and medications—to facilitate linking specific pathologic findings to potential diagnoses. By emphasizing important morphologic, immunophenotypic, genetic, and clinical features, this Fascicle fills this gap for practicing pathologists and trainees by illustrating the distinct morphologic characteristics and practical approach to the broad spectrum of benign blood and bone marrow disorders.