Figure 1.

—Schematic drawing shows the lymphatic capillaries in communication with the precollectors in the dermis, and the superficial and deep lymphatic collectors in the subcutaneous tissue. Corresponding sonograms show the trilaminar structure of the normal dermo-epidermal complex and the echotexture of the subcutaneous tissue. Light grey arrow (red in the online version): vertical lymphatic flow; black arrow: horizontal lymphatic flow; black circle: unidirectional valve. Ca: capillaries; PreC: precollectors; sC: superficial; dC: deep; DEC: dermo-epidermal complex; SUBC: subcutaneous tissue.