Ultrastructure of DC. DC appear as large, irregular elements showing a lobulated nucleus (N), and an electron-lucent cytoplasm with few organelles (stars) arranged close to the nucleus. Note the interdigitating cell processes in close contact (arrows) with the neighboring lymphocytes (L) (A; original magnification ×3,400). Immature DC exhibit shorter cell processes, a less irregular but usually indented nucleus, and membranous organelles scattered throughout the cytoplasm (B; original magnification ×7,900).