MRI is best to depict marrow involvement of the diploe and to evaluate the associated soft tissue component and invasion of adjacent tissues. CT is the most accurate method for evaluating bone destruction of the inner and outer tables, the lytic or sclerotic nature of the lesion and for the evaluation of mineralised tumour matrix.
The skull base forms the floor of the cranial cavity and, therefore, similar lesions can occur in this region however, there are lesions that are also specific to this location such as chordoma and chondrosarcoma.Ĭalvarial lesions are radiologically evaluated with CT and MRI. Lesions of the calvarium may originate from the bony structures or may be secondary to invasion of scalp-based lesions or brain-based lesions into the skull vault. It is composed of two cortical tables the inner and outer tables, and the diploe or marrow space between them (Fig.
The skull vault is formed by the frontal, parietal, temporal and occipital bones and parts of the zygoma and sphenoid bone. Calvarial lesions may be benign or malignant fortunately, benign tumours are the most commonly encountered lesions. Clinical parameters such as the age and clinical history are important factors to guide the radiological diagnosis. Occasionally, they may present as a visible, palpable or symptomatic lump. Eosinophilic granuloma is an osteolytic lesion with bevelled edges.Ĭalvarial lesions are often asymptomatic and are usually discovered incidentally during computed tomography (CT) or magnetic resonance imaging (MRI) of the brain or as part of workup of local clinical symptoms or staging of other diseases.Multiple myeloma presents as the classic “punched out” lytic lesions on radiographs.Metastatic lesions are most commonly due to breast cancer in adults and neuroblastoma in children.Metastases are the most frequent cause of skull lesions.Skull lesions are usually discovered incidentally they can be benign or malignant.In this article, we will review the imaging features of both common and uncommon calvarial lesions, as well as mimics of these lesions found in clinical practice. Clinical information such as the age of the patient, as well as the patient’s history is fundamental in making the correct diagnosis. Although the majority of skull lesions are benign, it is important to be familiar with their imaging characteristics and to recognise those with malignant features where more aggressive management is needed. Calvarial lesions can be benign or malignant. Calvarial lesions are often asymptomatic and are usually discovered incidentally during computed tomography or magnetic resonance imaging of the brain.
0 kommentar(er)
