100. W przypadku niedrożności żyły wrotnej może dojść do zespolenia między:
v. rectalis superior (rectal superior vein) - v. rectalis media et inferior - v. illiaca interna (internal illiac vein)
v. gastrica sinistra (left gastric vein ) - vv. oesophageales (oesophageal veins) - v. azygos (azygos vein)
vv. paraumbilicales (paraumbilical veins) - v. epigastrica superficialis (epigastric superficial vein) - v. axillaris (axillar vein)
v. epigastrica superficialis (epigastric superficial vein)- v. thoracoepigastrica (thoracoepigastic vein(s)) - v. axillaris (axillar vein)