HighlightsLow back pain is a common cause of medical consultation, and usually supposes a non-malignant prognostic.We report an abdominal aortic aneurism (AAA) as atypical etiology of low back pain.We should consider AAA as other cause of low back pain and routinely examine the abdomen and seek complementary imaging proves when risk factors for AAA are present.Orthopedic surgery for back spine stabilization has to be elective in those cases when vertebral destruction is above 30% and clinic is directly related to spine instability.

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HighlightsLow back pain is frequent during pregnancy but rare symptoms as saddle hypoesthesia or acute bladder dysfunction maybe the first warning shot of a cauda equine syndrome.Cauda equina syndrome (CES) gives rise to a wide spectrum of disorders related with urologic dysfunctions, what entails unpainful urinary retention and overflow incontinence.When CES is suspected, MRI is the main diagnosis probe even during pregnancy. MRI may not be delayed because early surgery has shown a better improvement when CES is confirmed.