Keloids covered the backs of Nagasaki atomic bomb survivors. Keloids are dense fibrous growths that grow over scar tissue; these keloids covered the backs of Nagasaki atomic bomb survivors taken between 1945 and 1950 (date, time, and location unknown).
Tumors, called keloids, developed from the burns and wounds of atomic bomb survivors due to the thickening of scars. Keloids occurred in approximately 50-60% of those exposed to heat radiation within 2 km of the hypocenter. Keloids are related to radiation. Keloids left permanent scars on the victims' minds and bodies. Those with keloids, especially on their faces, suffered even more emotionally, while those with keloids on their backs and shoulders were hesitant to show their skin.
Keloids are irregular, abnormally protruding scar tissue formed during the healing process of burned skin of A-bomb survivors. The name comes from the fact that the scars look like the shell or legs of a crab. Most commonly seen in survivors within about 2 km of the hypocenter, keloids formed four months after exposure and became most prominent six to 14 months thereafter. Most scars shrank and healed after about two years.
At 11:02 a.m. on August 9, 1945, in the waning days of the Pacific War, Fat Man, an approximately 21-kiloton detonation-type atomic bomb with plutonium as its core, exploded about 500 meters above Nagasaki. An estimated 70,000 Nagasaki citizens were killed and some 60,000 injured. The bomb exploded over Nagasaki City, an industrial city in the densely populated western part of Kyushu. The surrounding hills prevented the devastating effects of the atomic bomb from spreading over Nagasaki City. On the contrary, they concentrated the destructive power of the atomic bomb, making it more intense in the areas closest to the hypocenter. The Nagasaki atomic bomb obliterated hospitals and medical schools located within approximately 914 meters of the hypocenter. People within a radius of 1.5 km from the hypocenter disappeared in an instant.
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