Cyst with a mural nodule: unusual imaging characteristics of a cystic meningioma

A 38-year-old man presented with 2 to 3 months of intermittent headaches. Aside from hypertension, the patient was in good health. Physical examination and laboratory values were unremarkable. Routine unenhanced head CT (figure 1A,B) and gadolinium enhanced brain MRI (figure 2A–D) revealed a right frontoparietal cystic mass measuring 6.0×3.9×5.0 cm with an enhancing mural nodule and minimal peritumoral oedema. Imaging findings were suggestive of a primary glial tumour. The patient underwent surgery and the mass was completely resected. Histopathology …