Classification of oncological diseases depending on the stage of the disorder
And there are 5 stages.
Stage 0 is localized cancer.
Stage I is a tumor of small size, without invasion of the lymph nodes.
Stage II is a tumor without pronounced dimensions with minimal invasion of the lymph nodes.
Stage III is an advanced tumor that extends beyond the affected organ with significant lymph node invasion.
Stage IV - diffuse tumor with metastases.
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