A 40 years old female has been suffering from cluster headache for the last 20 years. For the last 1.5 years it has been transformed from an episodic form to a chronic one. The patient reports an episodes of vertigo, for which she carried out otorhinolaryngology examination and brain NMR. On NMR was detected a periventricular lesion of about 1.2 cm, without mass effect. This lesion was probably present also 4 years ago, when the patient underwent another NMR.