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Unilateral agenesis of internal carotid artery with interparaclinoid and contralateral carotid-anterior cerebral artery anastomoses diagnosed by magnetic resonance angiography: a case report
- Source :
- Surgical and Radiologic Anatomy. 44:289-292
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Unilateral agenesis of the internal carotid artery (ICA) is a rare anatomical variant. We identified a case of unilateral ICA agenesis with interparaclinoid and contralateral carotid-ACA anastomoses. A 65-year-old female with a long history of depressive episodes underwent MR imaging including MR angiography at National Hospital Organization Kyushu Medical Center. MR imaging was performed using a 3.0-T MR scanner to rule out vascular Parkinsonism, although drug-induced Parkinsonism was suspected from her medical history. The proximal left ICA was not visible on MR angiography, and an anterior communicating artery (ACoA) aneurysm was identified. The left middle cerebral artery was supplied from the right ICA via an interparaclinoid anastomosis. This interparaclinoid anastomosis showed no communication with the basilar, posterior communicating, or posterior cerebral arteries. A communicating artery connecting the interparaclinoid anastomosis and anterior cerebral artery (ACA) branched off from the presumed transition point between the interparaclinoid anastomosis and left ICA. Both right and left ophthalmic arteries (OAs) originated from the clinoid segment of the ICA. The communicating artery connecting the interparaclinoid anastomosis and ACA arose proximal to the left OA, and the communicating artery was identified as the carotid-ACA anastomosis. Neuroradiologists, physicians, and neurosurgeons need to be aware of this extremely unusual anatomical variant to determine appropriate treatment strategies in cases of aneurysmal growth or anterior cranial base surgery.
- Subjects :
- Adult
Communicating Artery
medicine.medical_specialty
Anterior Cerebral Artery
Cerebral arteries
Anastomosis
Magnetic resonance angiography
Pathology and Forensic Medicine
Ophthalmic Artery
medicine.artery
medicine
Anterior cerebral artery
Humans
Radiology, Nuclear Medicine and imaging
Child
Aged
medicine.diagnostic_test
business.industry
medicine.disease
Cerebral Angiography
Anterior communicating artery
Agenesis
cardiovascular system
Female
Surgery
Radiology
Anatomy
Internal carotid artery
business
Carotid Artery, Internal
Magnetic Resonance Angiography
Subjects
Details
- ISSN :
- 12798517 and 09301038
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Surgical and Radiologic Anatomy
- Accession number :
- edsair.doi.dedup.....5f8ff1025d9b492ff08372d3b28bb81b