Eagle\'s syndrome is a condition characterized by an elongated styloid process or a calcified stylohyoid ligament, which can lead to a plethora of symptoms, such as neck and facial pain upon movement, dysphagia, pharyngeal foreign body sensation, headache, and vertigo-like sensations. This pathology may affect one or both of a patient\'s styloid processes (unilateral or bilateral), with most of these cases going undiagnosed due to the vague nature of their symptoms. Nonetheless, the diagnosis of Eagle\'s syndrome must derive from the combined findings of both clinical examination and radiographic imaging. Symptomatic patients may require conservative or surgical treatment.

Background Eagle\'s syndrome is characterized by the anomalous elongation of the styloid process. This condition is usually identified through the manual evaluation of orthopantomogram (OPG) images, which is time-consuming and can have interobserver variability. The application of Artificial intelligence (AI) in radiology is gaining importance and interest in recent years. The application of AI in detecting styloid process elongation is less explored, advocating for research in the same arena. Aim and objectives The study aimed to evaluate the accuracy of artificial intelligence in detecting styloid process elongation in digital OPGs and to compare the performance of the three different AI algorithms with that of the manual radiographic evaluation by the radiologist. Materials and methods A total of 400 digital OPGs were screened, and linear measurements of the styloid process length (ImageJ software (National Institute of Health, Maryland, USA)) were done for the identification of styloid process elongation by a single calibrated observer to finally include a processed image dataset including 169 images of the elongated styloid process and 200 images of the normal styloid process. A machine learning approach was used to detect the styloid process elongation using the three different AI models: logistic regression, neural network, and Naïve Bayes algorithms in Orange software (University of Ljubljana, Slovenia). Performance evaluation was done using the accuracy, sensitivity, specificity, precision, recall, F1 score, and AUC-ROC (area under the receiver operating characteristic) curve. Results Logistic regression and neural network algorithms depicted the highest accuracy of 100% with no false positives or false negatives, securing a score of 1.000 for all the metrics. However, the Naïve Bayes model demonstrated a fairly considerable accuracy, classifying 49 false positive images and 59 false negative images with an AUC (area under the curve) score of 78 %. Nevertheless, it performed better than random guessing. Conclusion Logistic regression and neural network algorithms accurately detected styloid process elongation similar to that of manual radiographic evaluation. The Naïve Bayes algorithm did not perform an accurate classification yet performed better than random guessing. AI holds a promising scope for its application in automatically detecting styloid process elongation in digital OPGs.

Eagle\'s syndrome is characterised by elongation of the styloid process. The elongated styloid process can cause symptoms like dysphagia, facial or neck pain, syncope, visual changes, etc. In severe cases, it may cause a rupture or dissection of the carotid artery, which can lead to intracranial thrombo-embolism and ischemic stroke. We report a case of a 57-year-old male presenting with dysarthria and mild left-sided body weakness. An initial non-contrast computed tomography (CT) scan showed a possible right internal carotid artery thrombus. He developed worsening left-sided weakness and gaze palsy one day after the admission. Repeated CT brain and intracranial angiography were arranged, which showed significant oedema with mass effect and right internal carotid artery dissection with thrombus. He underwent decompressive craniectomy. An enlarged styloid process measuring 4.53 cm in close proximity to the cervical vasculature was also noted. He was not deemed an appropriate candidate for styloidectomy. Due to residual left-sided weakness, he had to take early retirement. He underwent extensive rehabilitation and was able to mobilize with the help of a quad stick after a period of nine months. At the five-year follow-up, there were no characteristic symptoms of Eagle\'s syndrome and he was mobilizing without support.

Eagle\'s syndrome, or ES, is associated with the elongation of the styloid process and partial or complete mineralization of the stylohyoid ligament. Clinically, the symptoms of ES are characterized by sore throat, neck pain radiating to the ear, dysphagia, and a foreign body sensation when swallowing, resulting from disruption of the neck or pharyngeal region. This report describes 3 male patients (40, 60, and 43 years old) with neck discomfort. These patients were inadvertently diagnosed with ES using multidetector computer tomography and 3-dimensional volumetric computed tomography (MDCT-3D CT). The length of the left styloid process in the first case was 42 mm. In the second case, the size of the right styloid process was 53 mm. In the last case, the length of the right styloid process was 41 mm, while the left side was 43 mm. This syndrome should always be suspected when pain is unilateral and unresponsive to analgesics, mainly in women. Diagnosis requires appropriate examination through radiological examination, special techniques, and experiences. We aim to present and re-emphasize the consideration of a differential diagnosis of ES for diagnosticians.

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Dysphagia is a relatively common condition in the general population and has a wide range of underlying etiologies. We present the case of a 58-year-old male who presented with a complaint of progressive difficulty swallowing for two years in duration associated with unintentional weight loss. He has been using a proton pump inhibitor therapy for more than one year, but he had only mild improvement in his symptoms. Recently, the patient started to experience neck pain during swallowing and he underwent a head and neck computed tomography scan, which demonstrated an extensive elongation of the left styloid process that measured 14.9 cm. The clinical and imaging findings were consistent with Eagle syndrome and the decision was made to perform a resection of the left styloid process. Excision of the left styloid process was made using the external cervical approach. At the follow-up visit, the patient reported a near-complete resolution of his complaints. Eagle syndrome is a very rare etiology of dysphagia. The case highlights an example of Eagle syndrome with an extremely long styloid process. This diagnosis should be considered when encountering a patient with dysphagia and neck pain.

UNASSIGNED: Mechanical stimulation may lead to internal carotid artery (ICA) dissection and aneurysm.
UNASSIGNED: We encountered a rare case of ICA dissection and aneurysm with prolonged styloid process (SP) fracture. A 37-year-old sales worker presented with right-sided amaurosis fugax. After admission to a nearby optical clinic, he was admitted to our hospital. Computed tomography angiography (CTA) and digital subtraction angiography showed dissection and apparent aneurysmal change in the right cervical portion of the ICA. CTA also showed elongated SPs, so we diagnosed Eagle\'s syndrome, and fracture of the right-side process. After 2 weeks of antiplatelet therapy, the aneurysm enlarged and dissection remained, so we treated the patient with coil embolization and stenting.
UNASSIGNED: We encountered a rare case of ICA dissection and aneurysm with Eagle\'s syndrome. Endovascular treatment was performed because the SP was fractured.

Eagle\'s syndrome is a rare cause of cervicofacial pain and is due to abnormalities in the stylohyoid process, stylohyoid ligament or lesser cornu of the hyoid bone. Generally, patients affected by Eagle\'s syndrome present with pain in the lateral or upper neck, angle of the mandible, submandibular space and throat (exacerbated by head movements and/or mastication); foreign body sensation; headache and referred otalgia. A 66-year old gentleman presented with a 36-month history of recurrent pain localising mainly to the right angle of the mandible and radiating to the submandibular triangle. No pathological changes were noted on multiple ultrasound scans. Flexible nasendoscopy revealed a right vocal cord palsy. Initially, the CT scan revealed an abnormality in the stylohyoid complex, and the patient was managed conservatively. Subsequent three-dimensional CT scan noted significant worsening of the abnormality in the stylohyoid complex. Due to progressive nature of the patient\'s symptoms and progression of stylohyoid complex calcification noted on imaging, the patient was listed for surgery. He underwent partial styloidectomy and vocal cord injection for cord paralysis secondary to impingement on the vagal nerve by the stylohyoid complex. The patient recovered well and denies any ongoing stylalgia. Various cases of Eagle\'s syndrome have been managed successfully in a conservative manner. However, the authors of this case report suggest that patients with Eagle\'s syndrome should be monitored closely. A delay in surgical intervention can lead to complications such as complete ossification of the stylohyoid complex and impingement on surrounding structures. This, in turn, increases intra-operative complexity.

Stroke is a common acute neurological injury that may develop due to arterial thrombosis or hemorrhage. However, it is uncommon in the young population. The etiologies of stroke in young patients are different compared with those for the elderly population. They include various non-atherosclerotic angiopathies, hematological conditions, and inflammatory disorders. We report the case of a 26-year-old man who presented to the emergency department because he noticed that his right hand had become clumsy. He first noticed this symptom five days before his presentation, but he noticed that his symptom had improved significantly since it began. He reported that he had episodes of neck pain and pain around the ear. He visited the family physician clinic several times for this complaint and was diagnosed as having a temporomandibular joint disorder. Neurological examination revealed decreased muscle strength in the right upper limb with a power of 4/5 along with a sensory deficit. The coordination was intact. No gait ataxia was noted. Considering the patient\'s age, the initial diagnosis was a demyelinating disorder such as multiple sclerosis. The patient underwent magnetic resonance imaging of the brain. It demonstrated an increased signal intensity in the territory of the left middle cerebral artery representing a left-sided infarction. Subsequently, the patient underwent computed tomography angiography of the head to rule out any structural malformation. The scan showed the presence of an elongated styloid process that appeared in close proximity to the neck vasculature. These radiological findings are consistent with Eagle syndrome. The patient underwent surgical resection of the styloid process. Eagle syndrome is a rare clinical condition that may have a myriad of clinical presentations. A high index of suspicion for this condition is vital to reach the diagnosis. Physicians should keep this condition in the differential diagnosis of stroke in the young population with no risk factors.

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