The sign of the cross.

Acute, painful, transient, right-sided, monocular visual loss lasting 4 hours developed in a 46-year-old man. This was followed by headache and left-sided transient hemiparesis. The association of ipsilateral transient vision loss with transient contralateral hemiparesis implicates involvement of the ipsilateral internal carotid artery (i.e., a crossed symptom).

Delayed Collet-Sicard syndrome after internal carotid dissection and Jefferson fracture. Case report and Review of Literature.

BACKGROUND: Lower cranial nerve palsies, or Collet-Sicard syndrome, can be caused by many different etiologies including head trauma, basilar occipital fractures, tumors, and interventions. Few reports describe different presentations of this condition, and we present here a case study to increase awareness of and add to the variable spectrum. CASE DESCRIPTION: A 56-year-old who had been hit while diving was admitted to our department. On examination, he was conscious without any signs of lateralization but presented with severe neck pain. CT brain and cervical spine revealed a C1 fracture with bilateral symmetrical fracture of the anterior and posterior arches (Jefferson's fracture) and slight bilateral joint dislocation C1-C2 discreetly predominant on the left. One week later, he presented with dysarthria, dysphonia, swallowing disorder, anisocoria, tongue deviation, and palate deviation (XII, IX, and X). CT Angiography showed dissection of the internal carotid artery immediately after the carotid bulb. He has been treated conservatively with curative anticoagulants with stable symptoms. No surgical intervention had been proposed. CONCLUSION: Adding to the literature, delayed Collet-Sicard syndrome and lower cranial affection can be caused by missed carotid wall hematoma following severe craniocervical trauma associated with Jefferson's fracture.

Traumatic Dissection of Arterial Cervical Vessels: Report of Two Cases and Literature Review

Even though traumatic dissection of cervical arterial vessels is themajor cause of stroke among adults, it is still an underdiagnosed disease in neurosurgical emergencies, since most patients do not have or present subtle clinical signs in the acute phase. The authors report two interesting cases of cervical artery dissection with different traumatic mechanisms and present a broad literature review about this subject.

Growing Evidence about the Relationship between Vessel Dissection and Scuba Diving.

Carotid and vertebral artery dissection are relatively frequent and risky conditions. In the last decade, different patients with extracranial (and in 1 case also intracranial) dissections associated with the practice of scuba diving were reported. The connection between the two conditions has not been fully explained so far. In the present article, we report the case of a patient presenting with Claude Bernard-Horner syndrome and homolateral XII cranial nerve palsy, manifesting a few days after diving in the cold water of a lake. The patient ended up having internal carotid artery dissection associated with the formation of a pseudoaneurysm. Here, we offer a summary of all cases reported in the literature about scuba diving and arterial dissection, and provide a critical discussion about which scuba diving-related factors can trigger the dissection of cervical vessels.