An 86-year-old patient presented at the outpatient clinic with a painless swelling on his right frontal scalp. The swelling had been slowly progressive over the last two years. His medical history was unremarkable and no other symptoms were present. His son had noted a slight increase in irritability. Physical examination showed a painless elastic swelling (figure 1). Neurological examination revealed no abnormalities. Magnetic resonance imaging of the brain (figure 2) and a histological biopsy were performed.