At the time of diagnosis of Hodgkin's lymphoma, which of the following area is often involved?

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E6 Medicine Harrison 22e Part 1 p. 910-912
E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 906-908
E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 629-631
Practise the full Chitranjjan National Cancer Institute Kolkata - 2021
Attempt every question from this paper in a timed mock, then review the full solution for each one.