I'll start by reading the medical library skill, then search for relevant content on neck secondaries in primary occult (unknown primary) simultaneously.

Now let me search the library and PubMed in parallel.

Good - the Scott-Brown's textbook has a dedicated chapter on CUP. Let me read the key sections now.

Excellent. Now let me read the full clinical management and treatment sections from Scott-Brown's chapter.

Let me read more of the clinical management section and the key points/best practice sections.

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