Depending on the patient's age, a lump on the right clavicle likely means an infected lymph node, a congenital lesion or a neoplastic lesion that may or may not indicate cancer, states Priory Medical Journals. In cases of malignant lumps, right clavicle lumps are associated with chest, esophageal and lung cancer, states Healthline.
For patients aged 40 years and below, in order of decreasing probability, a lump on the right clavicle is likely to mean an inflamed lymph node due to infection, a congenital lesion or a neoplastic lesion, according to Priory Medical Journals. For patients aged above 40 years, a lump on the right clavicle is likely to indicate cancer in the form of a malignant neoplastic lesion. If the lump appears suddenly and feels painful, it is likely due to an inflammatory condition. If the lump developed slowly and does not feel painful, it is likely due to a neoplastic lesion.
Inflamed lymph nodes that are secondary reactions to infections in the head and neck region typically resolve between four to six weeks, according to Priory Medical Journals. A persistent neck lump that has presented for more than six weeks urgently requires the attention of an ear, nose and throat specialist. If an adult presents such a neck lump, the lump is considered malignant unless proven otherwise. Persistent inflammation of the right supraclavicular lymph node may indicate lung, retroperitoneal or gastrointestinal cancer, according to the American Academy of Family Physicians. This is because the right supraclavicular lymph node regulates lymph drainage of the mediastinum, lungs and esophagus.