Overview of Malabsorption By Zubair Malik, MD, Lewis Katz School of Medicine at Temple University Reviewed / Revised Mar 2023 View Patient Education Pathophysiology Etiology Symptoms and Signs Diagnosis Topic Resources Suggested evaluation for... Causes of Malabsorption Symptoms of Malabsorption Small-Bowel Mucosal Histology... Malabsorption is inadequate assimilation of dietary substances due to defects in digestion, absorption, or transport.