Background In recent years, the incidence of stroke has gradually increased in young people. There are many reasons causing stroke, including atherosclerosis, artery embolization, and cervical artery dissection and so on. However, cervical artery dissection is a major cause of stroke in young people. We present a case of ischemic stroke caused by dissection, whose distal vascular occlusion due to detachment of the thrombosis in the right internal carotid artery. Case presentation A 33-year-old male patient was admitted to the hospital because of stroke. Imaging examination showed that there was no visualization of the right middle cerebral artery and there were a large number of mural thrombus in the C1 segment of the right internal carotid artery. After emergency surgery, the patient had vascular recanalization and the symptoms were significantly improved. Magnetic resonance imaging showed a high signal in the C1 segment of the right internal carotid artery, the abnormal signal disappeared after antiplatelet therapy. Conclusions When a patient has symptoms of stroke, we need to explore the root cause of stroke. Especially in young people, cervical artery dissection is an important reason that can’t be ignored. Through review and analysis of this case, we hope to improve the understanding of radiologists and clinicians about the cervical artery dissection, reduce the rate of misdiagnosis, and improve patients’ prognosis.

Background In general, common metastatic pathways for breast carcinoma include lung, liver, and bone. Described herein is a rare case of breast carcinoma metastasis to the trigeminal nerve. And numb chin syndrome(NCS) has a certain suggestive effect on the recurrence or progression of cancer patients. Case presentation a 54-year-old Chinese female was admitted to our hospital for progressive anaesthesia of the lower left lip and chin. She was diagnosed as breast ductal carcinoma 9 years ago. The brain MRI demonstrated dumbbell-shaped involvement of left trigeminal nerve which extended to left temporal lobe. Then we treated patient with radiotherapy, the patient’s numbness relieved rapidly. Conclusion After review and analysis of the case, we found numb chin syndrome (NCS) is a “red flag” symptom of malignancy.1 When cancer patients develop numb chin syndrome(NCS), we need to be alert to the possibility of distant metastasis. This case also suggests that clinicians should pay attention to the possibility of breast cancer metastasis to the trigeminal nerve.