en Radiation Biology Radiation Biology مطالعه موردي Case Report <div style="text-align: justify;"><span style="font-size:10pt"><span style="text-justify:newspaper"><span style="text-kashida-space:50%"><span style="line-height:119%"><span style="font-family:Calibri"><span style="color:black"><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-US">Background:</span></span></span></span></span></span> <span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-GB">Congenital anomalies of the internal carotid artery (ICA), such as agenesis, aplasia, and hypoplasia, are considerably rare, occurring in less than 0.01% of the population. Recognition of these anomalies is critical, as they may alter cerebral hemodynamics and impact clinical management. </span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-GB">Case Presentation: </span></span></span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-GB">We report a rare case of unilateral agenesis of the right ICA in an adult, incidentally detected during Magnetic resonance imaging (MRI). This anomaly was associated with several unusual vascular features: hypoplasia of the right common carotid artery, aberrant origin of the right subclavian artery from the aortic arch, and a hypoplastic right vertebral artery. Intracranial findings included basilar artery bifurcation supplying the right middle cerebral artery, fetal origin of the left posterior cerebral artery, and an anomalous origin of the right ophthalmic artery from the cavernous segment of the left ICA. Despite these extensive vascular variations, the patient was asymptomatic. </span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-GB">Conclusion: </span></span></span></span></span></span><span lang="en-GB" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-GB">Early diagnosis and knowledge of this unusual constellation of findings in patients with ICA agenesis are crucial for the optimization of clinical treatment and planning of possible surgical treatment in the future.</span></span></span></span></span></span></span></span></span></span></div> Carotid arteries, cerebral arteries, CT scan, MRI, congenital anomalies. 297 300 http://ijrr.com/browse.php?a_code=A-10-1-1491&slc_lang=en&sid=1 A. Baskar baskarmdrd@gmail.com 7900319475328460033045 7900319475328460033045 Yes Department of Radiodiagnosis, Sree Balaji Medical College and Hospital, Chromepet, Chennai, India V. Indiran 7900319475328460033046 7900319475328460033046 No Department of Radiodiagnosis, Sree Balaji Medical College and Hospital, Chromepet, Chennai, India V. Vignesh 7900319475328460033047 7900319475328460033047 No Department of Radiodiagnosis, Sree Balaji Medical College and Hospital, Chromepet, Chennai, India I. Rajkumar 7900319475328460033048 7900319475328460033048 No Department of Radiodiagnosis, Sree Balaji Medical College and Hospital, Chromepet, Chennai, India