Misdiagnosed reaction to marijuana becoming more common as states relax laws

From the Gazette:

A little-known, painful reaction to heavy use of potent marijuana is popping up in emergency departments, hospitals and clinics across the country.

Because the condition is often misdiagnosed, frequent users of large amounts of cannabis with high levels of the euphoria-inducing component THC find themselves in continuing agony and often receiving unneeded diagnostic testing and sometimes surgery exceeding $100,000.