A Boy exposed to the Nagasaki atomic bomb showed typical keloid scars similar to many burn patients. Initially, we found keloid scars in 67% of burn patients and 21% of trauma patients. Surgical excision of the keloids resulted in recurrence in the majority of cases.

　　Boys exposed to the Nagasaki atomic bomb showed typical keloid scars similar to those of many burn victims.

　A survey of the surgical sequelae of Nagasaki atomic bomb survivors seven years after the bombing was conducted by the Nagasaki University School of Medicine (Chouraisuke) in August 1946, September 1947, and January 1949, a total of three times. Initially, 67% of burn patients and 21% of trauma patients were found to have keloids in their scars. Moreover, even after surgical removal of the keloids, the majority of the keloids recurred.

　The third survey in January 1949 confirmed that the keloids tended to heal spontaneously over time and that the number of recurrences after surgery had decreased markedly. In 1952, seven full years after the Nagasaki atomic bombing, the status of atomic bomb keloids, the course of burns and trauma received from the atomic bomb, and the course of surgical treatment of motor disability of the limbs were observed. There were only 290 patients in total, 123 males and 167 females, with sequelae. Burns were the most common type of injury at the time of injury, followed by vitreous wounds, and fractures and dislocations were rare. Dislocations of the wrist and knee joints, which are characteristic of atomic bombings, were observed.

　The sequelae of the injuries were hypertrophic scars, but keloids were very rare, and most of the scars were ordinary simple simple scars. Contractures were mostly due to hypertrophic scarring, and the rest were due to fractures and dislocations. Nerve palsy is due to dissection of the nerve trunk caused by a piece of glass, and ulnar nerve palsy is the most common cause of palsy. The deformities of the ear shell were caused by chondritis due to suppuration of facial burns, resulting in deformity of the ear.

　Most of the keloids from atomic-bomb burns were transformed into simple or thickened scars, and only 6.3% of burns and 0.9% of traumatic injuries had small keloids on a part of the limbus. Furthermore, 3 out of 12 cases (2 burns and 1 trauma) were congenital keloids that were caused by moxibustion scars or insect bite scars. All other keloids caused by the atomic bomb tended to heal completely spontaneously, with the exception of those with congenital conditions.

Yoh Takeuchi, a 12-year-old girl, the daughter of a Hiroshima atomic bomb sufferer, suffered a dislocation of the right hip joint, trauma to the right lateral knee and left foot, and ulcerated contusions on October 11, 1945 at a temporary special relief hospital set up at the Oshiba National School in Hiroshima City.

　These are both lower limbs of Yoh Takeuchi, a 12-year-old girl whose daughter suffered from atomic bomb sickness caused by the Hiroshima atomic bomb. It was taken by Shunkichi Kikuchi on October 11, 1945 at the temporary special relief hospital established at the Oshiba National School in Hiroshima City. The daughter, Yoh Takeuchi, suffered a dislocated right hip, traumatic injuries to her right lateral knee and left leg, and ulcerated contusions.

    

Yoh Takeuchi was exposed to the bomb about 2 km southwest of the hypocenter. A refrigerator fell over and he became trapped under it, temporarily blacking out. As a result, his right hip joint was dislocated, and he suffered trauma to his right knee and the inside of his left leg. The wounds became infected and serious. She also received a shaved wound on the back of her head. Both mother and daughter entered Oshiba National School on September 18, the day the A-bomb disease manifested itself. About two months after the bombing, she developed A-bomb sickness. Hair loss, diarrhea, and fever followed. Her mother, Yone Takeuchi, died of A-bomb Disease on October 14, and her daughter, Yoh Takeuchi, died of A-bomb Disease in November 1945.

　A temporary special relief hospital was set up at Oshiba National School, located 2.4 km north of the hypocenter in Oshiba 1-chome, Nishi Ward, Hiroshima City. The school building was heavily damaged and partially destroyed by fire. The school yard was overflowing with evacuees and was converted into a temporary relief hospital. On August 6, the day of the atomic bombing, the area was engulfed in fire, and those who were in charge of the rescue had to evacuate temporarily, leaving behind severely injured patients who could not be moved. However, as soon as the fire subsided, medical personnel turned back and reassumed their medical duties. 2 doctors, 3 dentists, 2 pharmacists, and 1 midwife were assigned to the hospital.

 

A model of scar pathology tissue of a human body part caused by exposure to the Nagasaki atomic bomb was made and exhibited at the Nagasaki Atomic Bomb Museum. A keloid model of a Nagasaki atomic bomb survivor was made using a moulage.

 A model of scar pathology tissue of a human body part caused by exposure to the Nagasaki atomic bomb was made and exhibited at Nagasaki Atomic Bomb Museum. The model is a keloid pathology specimen of a burn wound from the right face to the neck. A model of keloidal tissue from a Nagasaki atomic bomb survivor was made using a moulage technique.

　　This is a model of a keloid pathology specimen of the right upper arm to forearm and fingers, with the wrist joint of the right hand extended and the fingers flexed and contracted. The Nagasaki Atomic Bomb Museum exhibited in the A-bombed section a melted glass bottle, a charred lunch box, a photo of a charred boy, a photo and model of keloid damage, and the reality of a piece of clothing with a piece of glass stuck in its back from the blast.

　The damage caused by the atomic bomb was the result of the combined effects of the blast, heat rays (radiant heat), and radiation, resulting in the appearance of extremely complex symptoms. In particular, 96.7% of those exposed within 1 km of the bomb died of burns and 96.9% of those exposed to trauma, and 94.1% of the uninjured survivors died. The early deaths from the atomic bombs were caused not only by burns and trauma, but also by the added damage of the intense radiation.

　The radiation from an atomic bomb penetrates the human body and destroys various cells. The degree of damage depends on the amount of radiation exposed. Of those exposed within 1 km of the hypocenter, the majority of survivors died, even if they were uninjured. The destructive power of radiation was intense on cells. The damage to the human body was not limited to the time of the explosion; radiation also damaged cells deep within the body. Over time, various symptoms developed from radiation damage. It caused cancer, leukemia, cataracts, and other diseases.

　Keloids were caused by an overgrowth of scar tissue that forms to repair the wound surface after a burn from an atomic bomb burst. It is a condition in which the skin surface is covered with irregular bumps that resemble the shell and legs of a crab. It began to appear around four months after the bombing and became most prominent between six months and one year and two months after the bombing. It was most common among those who were exposed to the bomb at a distance of approximately 2 km from the hypocenter.