Lymphoscintigraphic patterns in lymphedema with normal body mass index, obesity-induced lymphedema, phlebolymphedema, and lipedema.

Lower extremity swelling has a broad differential diagnosis, including lymphedema, obesity-induced lymphedema, phlebolymphedema, and lipedema. Although these conditions may appear similar clinically, their pathophysiology and lymphoscintigraphic findings differ. Obesity, venous insufficiency, and abnormal adipose tissue can complicate image interpretation. We present four representative cases to illustrate characteristic imaging patterns across these conditions. These cases highlight the importance of interpreting lymphoscintigraphy in a clinical context.