首の

of the neck

→ 首
phrase Rare #28,848
of the neck 首 means “neck,” and の links it to the following noun, as in 首の後ろ (the back of the neck) or 首の骨 (the neck bone).
JA: 首の後ろが痛いです。
EN: The back of my neck hurts.

階段から落ちて首の骨を折った

I fell down the stairs and broke my neck.

— キャッチ・ミー・イフ・ユー・キャン (2002)

首の

It's a lump in the neck!

— かぐや姫の物語 (2013)

彼は私より首の分だけ背が高い

He's about a head taller than me.

私の夫は首の神経痛めた

My husband injured a nerve in his neck.

トム首の調子はどう

How is Tom’s neck feeling?