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A 2.3-cm axillary lymph node had a small metastasis of cells 0.1 cm in size. How is that classified, according to the dimensions of the metastasis or to the dimensions of the lymph node?

April 26, 2017axillary cells Classified CM lymph node metastasis size small

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A 2.3-cm axillary lymph node had a small metastasis of cells 0.1 cm in size. How is that classified, according to the dimensions of the metastasis or to the dimensions of the lymph node?

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The size used for classification is the size of the measured metastasis not the size of the lymph node that contains the metastasis. The case would be classified as a micrometastasis (< or = 0.2 cm) and coded pN1mi.