Anorectal and perineal pain has been described in association with a variety of organic conditions but can also occur under circumstances in which organic disorders are absent and pathophysiology is uncertain. The three most common functional disorders causing anorectal and perineal pain are levator ani syndrome, coccygodynia and proctalgia fugax; Alcock's canal syndrome is also responsible for pain in these areas. We review current concepts about these disorders and the approach to diagnosis and management, and offer a provocative interpretation of the role of psychological factors.

Internal carotid artery dissection (ICAD) is a rare entity that either results from traumatic injury or can be spontaneously preceded or not by a minor trauma such as sporting activities. It represents a major cause of stroke in young patients. The diagnosis should be suspected with the combination of Horner's syndrome, headache or neck pain, and retinal or cerebral ischaemia. The confirmation is frequently made with a magnetic resonance angiography (MRA). Although anticoagulation with heparin followed by vitamin-K-antagonists is the most common treatment, there is no difference in efficacy of antiplatelet and anticoagulant drugs at preventing stroke and death in patients with symptomatic carotid dissection. We describe a patient with ICAD following deep sea scuba diving, who presented with Horner's syndrome and neck pain and was successfully treated with anticoagulants.

Excessive alcohol consumption is higher in men, in separated and divorced people, and in those with a high economic level and becomes lower with age. Patients with excessive alcohol consumption use fewer drugs and psychiatric drugs.

Subarachnoid hemorrhage implies the presence of blood within the subarachnoid space from some pathologic process. The initial study of choice is an urgent Cranial Computed Tomography scan, but its sensitivity declines with time. So that it is recommended that patients with severe sudden headache but normal Cranial Computed Tomography scan, should have a lumbar puncture performed, more than 12 hours after the onset of symptoms, to rule out subarachnoid hemorrhage. The methods for distinguishing among traumatic lumbar puncture and true Subarachnoid hemorrhage include the erythrocyte level, the "three tube test", D-dimer assay and ferritin in cerebrospinal fluid. But the best technique is the xanthochromia o yellow-to-orange cerebrospinal fluid supernatant, measured spectrographically. We report a case of a young woman with a subarachnoid hemorrhage diagnosed by xanthochromia after 18 days after the onset of bleeding.

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