Metastatic Lung Carcinoma to Skull, an Atypical Presentation with Atypical Radiologic Features: A Case Report

A 65-year-old male patient was referred to a university hospital with a skull mass and previous history of left lung carcinoma, although a left sided pneumonectomy had been performed two years ago. The large solitary extra-axial, intra- and extra-osseous skull mass exhibited uncharacteristic radiologic features that were atypical for all of the proposed differential diagnoses, which included metastasis, atypical meningioma, and osteosarcoma. An incomplete patient history also made the radiologic diagnosis more difficult. In the end a tumour excision was performed and the tissue morphology and immunohistochemical properties examined, and the diagnosis of a metastatic lung carcinoma to the skull was confirmed.