they have got a root nodule

Only a doctor can order the tests to determine if any thyroid nodule is dangerous. A thyroid uptake scan will help your doctor determine if your thyroid is hot (active) or cold (inactive).

A singer's nodule, also known as a screamer's nodule or a teacher's nodule, is a small, inflammatory or fibrous growth on the vocal cords. It typically occurs in people who constantly strain their voices.

A benign fatty yellowish nodule is called a tumor.

There's blood supply inside of it not just leading to it