Objective: This case report highlights arachnoid cyst, a rare benign space-occupying lesions (SOL) formed by an arachnoid membrane containing cerebrospinal fluid (CSF) which in most cases, are identified by accident. Conversion disorder is characterized as a deficit or distortion in neurological functioning, or symptoms suggesting a general medical condition that is not referable to an organic lesion. Methods: We report a case of a 24 year old woman who came to a psychiatrist with history of suicide attempt. She had a history of failed marriage but no history of substance abuse. She had a history of dizziness, light-headedness, blurred vision, seizure and headache for a while. Seizure was identified to be pseudo seizures in further assessments. Results: Diagnosis of Conversion Disorder with Adjustment Disorder was revealed. In Barin Computerized Tomography (CT) scan there was an extra axial cystic lesion with the height, frontooccipital and lateral size of approximately 6.4 cm by 4 cm by 2.5 cm respectively in the left anterior middle fossa and Sylvian fissure. Based on patient's history, the arachnoid cyst and its symptoms may have a synergistic effect on patient's symptoms of conversion disorder. Conclusion: This case reflects the importance of ruling out medical problems in patients with psychiatric symptoms.

Objective: To report a case of neuroleptic malignant syndrome (NMS), secondary to low dose quetiapine in an elderly Iranian man. Methods: We report a 66-year-old male presented with a temperature of 39.30c, dysphagia, aphasia and decreased level of consciousness and mutism following the use of 25 mg quetiapine. Results: Some evidence suggests an atypical NMS presentation with the atypical antipsychotics. Atypical NMS has been defined as less severe than that seen with conventional antipsychotics. Symptoms include fewer EPS, smaller increases in CK, less muscle rigidity, and lower fever. Conclusion: Clinicians should be aware that NMS with a single dose of quetiapine is possible.

Internet addiction is defined as mismanagement of internet use that causes mental, social and occupational problems. Thus, the assessment of prevalence of this disorder can lead to preventive measures and appropriate treatment to prevent its spread. Methods: In this cross-sectional study, prevalence of internet addiction disorder was assessed in Rafsanjan University of Medical Sciences, Rafsanjan, Iran in 2012. Stratified random sample was used to select 224 students. Demographic data were recorded and Internet Addiction test Test (IAT) questionnaire was administrated. Results: Out off 224 students participating in the study, 86 (38.4%) were males and 138 (61.6%) were female with a mean age of 21.05± 0.1 years. Most of the students (42.4%) were using the internet "under one hour" and the lowest (4%) "More than six hours". Mean test score of IAT was 24.81 ± 1.08 (mild addiction). In terms of internet addiction, 95 (42.4%) cases were normal users, 115 (51.3%) had mild addiction, 12 (5.4%) showed moderate addiction and 2 (0.9%) were cases of severe addiction which are lower compared to previous studies. Conclusion: The rate of internet addiction among students of Rafsanjan University of Medical Sciences in Iran is lower than the previous reports. It is still necessary to curb the spread of this problem due to its complications.