Replaced right posterior cerebral artery associated with ipsilateral superior cerebellar artery type persistent trigeminal artery variant diagnosed by magnetic resonance angiography.

Purpose: To describe a case in which a right replaced posterior cerebral artery (PCA) was associated with an ipsilateral superior cerebellar artery (SCA) type persistent trigeminal artery (PTA) variant.

Methods: A 53-year-old man who had been diagnosed with chronic dissection of the left vertebral artery (VA) 4 months previously underwent follow-up magnetic resonance (MR) angiography using a 3-Tesla scanner.

Results: MR angiography showed a slightly dilated left VA at the terminal segment without interval change.

Large arterial ring formed by a duplicate origin of the middle cerebral artery (MCA) with a frontal branch arising from the superior channel of the ring (main MCA) diagnosed by magnetic resonance angiography.

Purpose: To describe a case of large arterial ring formed by a duplicate origin of the right middle cerebral artery (MCA) associated with a frontal branch arising from the superior channel of the ring (main MCA) using magnetic resonance (MR) angiography.

Methods: An 81-year-old man with spinocerebellar degeneration underwent cranial MR imaging and MR angiography using a 1.5-Tesla scanner.

Frontal branch of the left middle meningeal artery arising from the ophthalmic artery diagnosed by magnetic resonance angiography.

Purpose: A case of frontal branch of the left middle meningeal artery (MMA) arising from the ophthalmic artery (OA).

Methods: A 73-year-old woman with vertigo underwent cranial magnetic resonance (MR) imaging and cranial MR angiography using a 1.5-Tesla scanner.

V3 segment of the right vertebral artery taking an anomalous posterosuperior course and penetrating occipital bone (wall of the jugular foramen) diagnosed by magnetic resonance angiography.

Purpose: To describe a case of an anomalous posterosuperior course of the V3 segment of the right vertebral artery (VA) that penetrated the occipital bone (wall of the jugular foramen).

Methods: A 33-year-old healthy woman underwent cranial magnetic resonance (MR) imaging and MR angiography from the upper cervical to the intracranial region using a 3-Tesla scanner to screen for asymptomatic brain lesions, including cerebrovascular diseases.

Results: MR angiography showed no pathological arterial lesions such as aneurysms; however, there was an anomalous posterosuperior course of the V3 segment of the right VA.

Aberrant course of the right petrous internal carotid artery (ICA) associated with right type 1 proatlantal artery and bilateral occipital arteries arising from the ICA diagnosed by computed tomography angiography.

Purpose: To describe a case of multiple extremely rare cervical arterial variations.

Methods: A 55-year-old man with a tentative diagnosis of right internal carotid artery (ICA) stenosis was examined using computed tomography (CT) angiography for the evaluation of vascular lesions in the neck and head region. A 64-slice CT machine was used.