The death of Catherine O'Hara has highlighted a rare congenital disorder known as situs inversus. It's a condition in which the organs in your chest and abdomen are positioned in a mirror image of normal human anatomy. The actress had been diagnosed with this odd anatomical reversal earlier, but it's uncertain whether this contributed to her passing. So, what causes situs inversus, how is it diagnosed, and why can it turn deadly?
Click on for a diagnosis of this uncommon and little-known medical anomaly.