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Unequivocal or debatable examples of lymphovascular invasion (LVI). (A) Some inflammatory cells in a lymphovascular space in a noninflammatory background as a mimicker of true LVI is considered negative LVI with a 75% concordance rate. (B) Complicated lymphovascular spaces demonstrated by ERG staining with attachment of tumor cells showing a 50% concordance rate for positive LVI. (C) Debatable LVI with 50% concordance rate.
