Thorax 2009;64:371–372. doi:10.1136/thx.2008.111039 REFERENCES 1. Cox LS, Clark MM, Jett JR, et al. Change in smoking status after spiral chest computed tomography scan screening. Cancer 2003;98:2495–501. 2. Townsend CO, Clark MM, Jett JR, et al. Relation between smoking cessation and receiving results from three annual spiral chest computed tomography scans for lung carcinoma screening. Cancer...

CONTEXT Splenic artery aneurysms are rare and they are usually easy to diagnose. Spiral computed tomography is the most sensitive diagnostic technique for this disease. Its primary treatment is interventional radiology; surgery is indicated in selected cases. CASE REPORT We herein report a case of an elderly male patient with a completely thrombosed aneurysm of the splenic artery. The spiral ...

The mandibular first molars ( primary and permanent) usually have 2 roots located mesially and distally, but occasionally they have an additional root located distolingually requiring special attention when root canal treatment is being considered . The additional root is regarded as a normal racial and morphological variation rather than as an abnormality. It appears to be more common in races...

The C-shaped canal system is an anatomical variation mostly seen in mandibular second molars, although it can also occur in maxillary and other mandibular molars. Such variation in the root canal anatomy is uncommon in mandibular first premolars and very rare in mandibular second premolars. The C-shaped canal is so named for the cross-sectional morphology of the root and root canal. The main an...