Snapshot: Rare case of twins sharing a spine

In this February 8, 2011 photo provided by Le Bonheur Children's Hospital, Adrienne Spates holds her conjoined twin sons, Joshua, left, and Jacob Spates in Memphis, Tennessee. The boys were joined back-to-back at the pelvis and lower spine, each with separate hearts, heads and limbs. The 7-month-old boys were separated August 29. An MRI scan of the conjoined twins show them sharing spine. Photo: AP/Le Bonheur Children's Hospital)

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