Background: Fibromuscular dysplasia (FMD) is a noninflammatory and nonatherosclerotic arteriopathy that is characterized by irregular cellular proliferation and deformed construction of the arterial wall that causes segmentation, constriction, or aneurysm in the intermediate-sized arteries. The incidence of FMD is 0.42–3.4%, and the unilateral occurrence is even rarer. Herein, we report a rare case of a localized extracranial carotid unilateral FMD associated with recurrent transient ischemic attacks (TIAs) treated by extracranial-intracranial bypass for indirect revascularization. The specific localization of the disease rendered our case unique. Methods: We conducted a review of the PubMed Medline database search using the following combined formula: ((FMD [Title/Abstract]) AND ((isolated [Title/Abstract]) OR (localized [Title/Abstract]))) AND Internal carotid artery (ICA) (Title/Abstract). Additional resources were included by screening the reference list of the selected papers. Results: A total of six cases were found, and all accounted for localized FMD affecting the ICA. The age range was between 19 and 52, the male-to-female ratio was (2:4), and all of the cases consisted of unilateral carotid FMD, mainly on the left side with a left-to-right ratio of 5:1. The management and outcome of these cases varied according to the case and associated complications. Conclusion: Extracranial localized FMD of the ICA is a rare subtype of FMD that has little documentation in the literature. In our case, it was a localized extracranial carotid unilateral FMD associated with recurrent TIAs. The appropriate treatment was using the intracranial-extracranial bypass.

Background: The right-sided aortic arch (RAA) is an uncommon anatomical anomaly found in <0.1% of the adult population. In this article, we report a case of RAA anomaly with an aberrant left subclavian artery (ALSA) and Kommerell’s diverticulum associated with aneurysmal dilation of the ascending aorta, left carotid artery (CCA) stenosis, and pancake kidney presented with a transient ischemic attack (TIA). To the best of our knowledge, this is the first case in the literature that discusses such associations, especially in a symptomatic patient with neurological rather than tracheaesophageal symptoms and in the absence of the steal phenomenon. Case Description: A 52-year-old male, with a history of recurrent multiple TIAs, presented immediately after the onset of blurred vision and left-sided weakness. The initial diagnostic cerebral angiogram revealed a left CCA stenosis of <30%, with normal posterior circulation vasculature. The diagnosis of RAA was made with computed tomography angiography (CTA) of the thoracic and abdominal aorta, which revealed Type 2 RAA, with ALSA, which had a bullous dilatation at its origin that suggests Kommerell’s diverticulum. Another two findings on CTA were a persistent left-sided superior vena cava that ended in the coronary sinus and a single pelvic fused renal mass (Pancake kidney). Conclusion: We presented an extremely rare case of RAA with ALSA associated with a group of extra rare anomalies. Understanding the anatomical variants of RAA and its characteristics is critical to improving the management and follow-up of patients with such anomalies.

Background: Mortality due to head trauma is common in developed countries in all age groups. Nonmissile penetrating skull base injuries (PSBIs) due to foreign bodies are quite rare, accounting for about 0.4%. PSBI carries that a poor prognosis brainstem involvement usually is often fatal. We are reporting the first case of PSBI with a foreign body insertion site through the stephanion with a remarkable outcome. Case Description: The 38-year-old male patient was referred with a penetrating stab wound to the head through the stephanion caused by a knife after a conflict in the street. He had no focal neurological deficit or cerebrospinal fluid leak, and Glasgow coma scale (GCS) was 15/15 on admission. A preoperative computed tomography scan showed the path of the stab beginning at the stephanion, which is the point where the coronal suture crosses the superior temporal line, heading toward the cranial base. Postoperatively, GCS was 15/15 without any deficit apart from the left wrist drop, possibly due to a left arm stab. Conclusion: Careful investigations and diagnoses must be made to ensure convenient knowledge of the case due to the variety of injury mechanisms, foreign body characteristics, and individual patients’ characteristics. Reported cases of PSBIs in adults have not reported a stephanion skull base injury. Although brain stem involvement is usually fatal, our patient had a remarkable outcome.