Lymphedema By James D Douketis, MD, McMaster University Reviewed / Revised Jun 2022 | Modified Sep 2022 View Patient Education Etiology Symptoms and Signs Diagnosis Prognosis Treatment Key Points Topic Resources Lymphedema Lymphatic Filariasis (Range... Lymphedema is edema of a limb due to lymphatic hypoplasia (primary) or to obstruction or disruption (secondary) of lymphatic vessels.