FYI the lymph node is not actually in the clavicle but rather near/adjacent to the clavicle, termed supraclavicular if above the clavicle and infraclavicular if below the clavicle.
Lymph nodes are bean-shaped structures throughout the body that work as filters for harmful substances. They contain immune cells that can help fight infection by attacking and destroying germs that are carried in through the lymph fluid.
The size and morphology of a lymph node help to determine if it is worrisome or not worrisome. In general, a node that measures less than 1 cm in short axis and/or contains a fatty hilum is likely benign/reactive, probably infectious and/or inflammatory, whereas a node that measures greater than 1 cm in short axis and/or does not contain a fatty hilum is indeterminate/suspicious and warrants further workup such as a biopsy to rule out lymphoma and/or metastases.
In your case, your node did not have any worrisome features so you can sleep easy. However, if you happen to notice it getting larger/swelling or experience weight loss, fever, and/or night sweats, you can consider repeat imaging.
Hello sorry, I was wrong about the size!
Large axis = 11 mm and small axis 5 mm