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This is from a news article :

As years went by, some researchers began to wonder if radiation was still necessary. Chemotherapy, surgery and medical imaging had improved, and patients were being diagnosed earlier, before their cancer was as advanced.

"As" seems to be an adverb meaning 'to the same degree or amount' in this context so I think 'as to require radiation' is omitted after "as advanced" in this context.

Am I right?

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If the diagnosis is later in the course of the disease the cancer has developed further - it is more advanced when diagnosed. Earlier diagnosis means the cancer is less advanced. You could add a clarifying phrase to make the end of the sentence "before their cancer was as advanced as in the past".

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  • Thank you very much.
    – user157844
    Jun 5, 2023 at 5:26

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