The human body is capable of harboring some truly bizarre and astonishing phenomena. Consider the man who discovered a two-inch spruce tree growing in his lungs, or another who found a living fly larva in his eyeball.
Among these unsettling medical curiosities are teratomas—tumors that can contain hair, bones, and teeth—and the equally chilling phenomenon known as a “stone baby.”
Scientifically referred to as lithopedion, a stone baby occurs when a fetus dies during an abdominal pregnancy. Unable to be reabsorbed by the body due to its size, the fetus undergoes calcification as part of a foreign body reaction. These pregnancies typically fail because of insufficient blood supply, and with no natural way for the body to expel the fetus, it remains inside, slowly turning to stone.
In 2013, a startling case emerged from Colombia.
An elderly woman arrived at the hospital complaining of abdominal pain. Doctors were stunned to discover a lithopedion inside her—more shocking still, she had unknowingly carried the calcified fetus for 40 years. According to ABC News, the woman had been living with the four-pound stone baby for four decades, only learning of its existence after undergoing an X-ray.
Dr. Kim Garcsi, who at the time led the ob/gyn clerkship program at University Hospitals Case Medical Center in Cleveland, emphasized the extreme rarity of the condition. She noted that lithopedions have only been documented approximately 300 times in medical literature.
Despite its grim implications, Garcsi explained that the calcification process serves a protective function for the body. “When you get old cartilage in the knee, it calcifies,” she said. “Most of the time, people find these and [sometimes] even after they’re found and don’t do anything about it because they’re totally asymptomatic.”
Abdominal pregnancies occur at a rate of about 1 in every 10,000, but advances in modern medicine typically allow doctors to detect complications long before a lithopedion can form. Given that the woman had likely been carrying the fetus since the 1970s, medical diagnostics have evolved significantly since then.
