This case shows a partially thrombosed aneurysm of the right extracranial internal carotid artery. The patient had a history of carotid endarterectomy on the right side, years ago.

In the setting of newly diagnosed skin cancer, the thrombosed part of the aneurysm was misinterpreted as a pathologically enlarged lymph node in the prior ultrasound examination.

CT angiography confirmed follow-up sonography findings of an aneurysm.

Multiple further/secondary findings not discussed here.