The aim of this study was to identify the spectrum of abnormalities revealed on high-resolution computerized tomography (HRCT) in patients with ankylosing spondylitis (AS), to compare findings with those of plain radiography and pulmonary function testing (PFT), and to look for correlations between lung involvement and AS severity. We prospectively studied 55 consecutive patients with a diagnosis of AS according to the modified New York criteria who attended our department over a period of 2 years. All patients had a detailed rheumatological examination and underwent plain chest radiography, chest HRCT and PFT. HRCT revealed abnormalities in 29 patients (52.7%), whereas plain chest radiography was abnormal in only 2. Abnormalities consisted of interstitial lung disease (ILD) ( n=4), apical fibrosis ( n=5), emphysema ( n=5), bronchiectasis ( n=4), ground glass attenuation ( n=2), and non-specific interstitial abnormalities ( n=26). Only apical fibrosis and bronchiectasis were statistically more frequent with increasing disease duration (significant trend chi(2)test, p=0.0029 and 0.028, respectively). PFT showed a restrictive process in 19 patients (34.5%). No correlation was noted between HRCT and PFT, nor with AS symptomatic and structural severity parameters. However, there was a statistically significant correlation between PFT and AS symptomatic and structural severity parameters. In conclusion,: this study confirms that the chest HRCT of patients with AS showed a great number of abnormalities undetectable by standard X-rays. The high incidence of lung abnormalities emphasizes the importance of excluding such a diagnosis in patients with AS even without respiratory symptoms.

P i c t u r e 1 . CT s c a n wi t h i n t r a v e n o u s c o n t r a s t s h o we d a ma s s i n t h e a n t e r i o r p o r t i o n o f t h e r i g h t l o we r q u a d r a n t e x t e n d i n g a l o n g t h e l a t e r a l c o l o n wa l l wi t h f a t d e n s i t y s h o wi n g s t r e a k s i n a wh i r l i n g p a t t e r n . PICTURES IN CLINICAL

Sandhoff disease is a rare and severe lysosomal storage disorder representing 7% of GM2 gangliosidoses. Bilateral thalamic involvement has been suggested as a diagnostic marker of Sandhoff disease. A case of an 18-month-old infant admitted for psychomotor regression and drug resistant myoclonic epilepsy is presented. Cerebral CT scan showed bilateral and symmetrical thalamic hyperdensity. MRI revealed that the thalamus was hyperintense on T1-weighted images and hypointense on T2-weighted images with a hypersignal T2 of the white matter. Enzymatic assays objectified a deficiency of both hexosaminidases A and B confirming the diagnosis of Sandhoff disease.

This study aimed to assess students’ perceptions of their educational environment in the Faculty of Medicine and Pharmacy of Rabat, Morocco, using the Dundee Ready Educational Environment Measure (DREEM). A cross-sectional survey was conducted in the Faculty of Medicine and Pharmacy of Rabat, Morocco, in which medical students’ perceptions of their educational environment were assessed using the DREEM criteria during the 2013-2014 academic years. The DREEM inventory encompasses 50 items divided into five subdomains: perceptions of learning, perceptions of teaching, academic self-perceptions, perceptions of atmosphere, and social self-perceptions. The DREEM has a maximum score of 200, which would correspond to a perfect educational environment. The mean scores (±standard deviation) of students’ responses were compared according to their year of study and gender. The responses of 189 postgraduate medical students were included. The mean total DREEM score was 90.8 (45.4%). The mean total scores for five subdomains were 21.2/48 (44.2%), 21.8/44 (49.6%), 13.1/32 (40.9%), 19.0/48 (39.6%), and 15.6/28 (55.7%) respectively. Female students reported higher perceptions of teaching scores than males (P=0.002), and students in their fifth year of study reported significantly higher social self-perceptions scores than those in their fourth year (P=0.03). In this study of the oldest faculty of medicine in Morocco, students perceived the educational environment as having many problems.

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