Great saphenous vein (GSV). (A) Course of the GSV. (B) Groin tributaries of the GSV.|@|~(^,^)~|@|Course of small saphenous vein.|@|~(^,^)~|@|Patterns of great saphenous vein (GSV) reflux (A∼P).|@|~(^,^)~|@|Hypoplastic (A, white arrow) or aplastic (B, arrow head) great saphenous vein (GSB). Dilated accessory vein is replacing the aplastic GSV segment (B, red arrow).|@|~(^,^)~|@|Aneurysm of great saphenous vein (GSV). GSV aneurysm about 5 cm in diameter pushes the skin away (A). Spontaneous contrast is seen due to stasis on B-mode ultrasound image (B).|@|~(^,^)~|@|Great saphenous vein reflux with chronic luminal changes. On color mode, partial recanalization with reflux (white arrow) and fibrous tissue (arow head) is observed.|@|~(^,^)~|@|Patterns of small saphenous vein reflux. R indicates segments with reflux and N indicates normal segment. ≠Indicates no interconnection.

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