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What is the difference between varicose collateral venous circulation and non-varicose circulation, and how are they clinically identified? (Include examples or images)

clinical identification of varicose collateral venous circulation
difference between varicose collateral venous circulation and non-varicose circulation

Images

Sources

A case report of thrombosed varicosities of pubic collateral ...

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ncbi.nlm.nih - 1

Collateral circulation in the obstruction of the superior vena ...

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ncbi.nlm.nih - 2

Lower Extremity Venous Anatomy - PMC

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ncbi.nlm.nih - 3

Answer