Top stories in health and medicine, March 7, 2013

Brought to you by MedPage Today.

1. Even Mild Hits to Head Disrupt Blood-Brain Barrier. Football players who experienced repeated mild hits to the head, even without receiving a true concussion, showed evidence of disruption of the blood-brain barrier and an autoimmune response in the brain, which may help explain the premature neurodegeneration increasingly seen in athletes.

2. Cellulitis Dx Often Incorrect. Three-fourths of cellulitis diagnoses proved to be other skin disorders mimicking cellulitis.

3. Insomnia Tied to Heart Failure. Patients with insomnia are at increased risk for heart failure.

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