![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d5/Raynaud-hand2.jpg/100px-Raynaud-hand2.jpg)
- ... that Raynaud's phenomenon, or vasospasm causing discolouration of the extremities (pictured), can be the presenting symptom in conditions like scleroderma?
- ... that gestational diabetes occurs in women without previously diagnosed diabetes who exhibit high blood glucose levels during pregnancy?
- ... that catamenial pneumothorax is a condition of collapsed lung occurring in conjunction with menstrual periods, believed to be caused primarily by endometriosis of the membrane surrounding the lung?