患者,男,20岁。下腹部轻微坠胀不适1周余。查体:腹部未触及明显包块及压痛。彩超提示:盆腔5cm×7cm不均质回声区,形态不规则,边界尚清晰,考虑盆腔占位。盆腔CT平扫+增强提示:膀胱后上方、直肠右前方可见混杂密度占位影,大小约4.9cm×6.5cm×7.3cm,脂肪密度为主,内见条片状软组织密度影,并见条状、点状钙化。增强扫描软组织密度影轻度强化,临近膀胱、直肠、前列腺及精囊受压。盆腔未见明显肿大淋巴结,未见明显盆腔积液。考虑盆腔占位,畸胎瘤可 Patient, male, 20 years old. The lower abdomen slightly bulge discomfort more than 1 week. Physical examination: the abdomen did not reach the obvious mass and tenderness. Choi ultrasound Tip: pelvic 5cm × 7cm heterogeneous echo area, irregular shape, the border is still clear, consider pelvic mass. Pelvic CT scan + enhancement tips: the upper part of the bladder, the right front of the rectum can be seen mixed density occupying the shadow, the size of about 4.9cm × 6.5cm × 7.3cm, the main fat density, see the soft patch of soft tissue density, and see the article Like, dot-like calcification. Enhanced scanning soft tissue density mild enhancement, near the bladder, rectum, prostate and seminal vesicle pressure. No significant enlarged pelvic lymph nodes, no significant pelvic fluid. Consider the pelvic mass, teratoma can be