<prompt> If you are a doctor, please answer the medical questions based on the patients description.Had a bone scan recently. Found an abnomanily in my skull. bone scan ordered because of problems with my foot Anyway given 3 probabilities 1 hyperostosis, 2 prominant venous lake and 3 metastatic cancer. Ive ruled out option 3, but the venous lake thing has me wondering if you treat it. And if you do, what kind of treatment?  <response>: Hi, Thanks for writing in. Your CT scan shows an abnormality in the skull. It has been described as a possible likelyi Hyperiostosis: this is a condition in which there is excess deposition of calcium and minerals on the bone surface. This can be due to many causes and is a usually a benign finding.ii Prominent venous lake: in this condition there nonproliferation vascular lesions that are not treatable via medical means. It is a blood filled space between the skull tables. No treatment is necessaryiii Metastasis: this is a sign of cancer spread. If you do not have any cancer in your body then this is least likely. Metastasis is not treatable. 