患者，女，１６岁，因周期性下腹疼痛时肛门坠胀感２年入院，曾诊为结肠炎、阑尾炎。每次发作时静滴青霉素８００Ｕ／ｄ，５～７天好转。３天前腹痛再次发作，以右下腹为著，全身发热，饮食少。月经尚未初潮，否认性生活史。体检：Ｔ３７．８℃，Ｐ９０次／ｍｉｎ，Ｒ２０... Patients, female, 16 years old, due to periodic lower abdominal pain when the anorexia feeling 2 years admitted, had diagnosed with colitis, appendicitis. Each episode infusion of penicillin 800U / d, 5 to 7 days improved. 3 days ago abdominal pain attack again, to the right lower abdomen as a whole body fever, diet less. Menstruation has not yet menarche, denied sexual life history. Physical examination: T37.8 ℃, P90 times / min, R20