PET-CT对腹膜假性黏液瘤的诊断价值

Diagnostic Value of PET-CT in Pseudomyxoma Peritonei

[目的]探讨正电子发射计算机断层显像（PET-CT）对腹膜假性黏液瘤（PMP）诊断价值。[方法]回顾性分析本院收治的1例经手术证实的PMP患者的PET-CT影像特点，根据其最大18F-FDG标准吸收值（SUV-max）及其影像特点总结其诊断经验。[结果]PET-CT图像显示腹、盆腔内大量水样密度影，CT值范围约15～19HU，未见明显糖代谢增高。SUVmax为0．86，增强扫描“腹水”未见明显异常强化；改变体位（右侧卧位）检查腹腔内水样密度影形态变化不明显，腹腔肠管未见明显活动；肝脏边缘呈扇贝形受压，肠管受压、内移；网膜、肠系膜未见明显增厚，腹腔内未见明显肿大淋巴结，综上考虑为PMP可能性大，术后病理证实为低级别PMP。[结论]PMP较罕见，PET-CT对该病有较好的诊断价值。

[Objective] To discuss the diagnostic value of PET-CT in pseudomyxoma peritonei（PMP）. [Meth- ods]One case of PMP with postoperative pathology confirmed by surgery in our hospital was retrospectively ana- lyzed. Based on the maximal standardized uptake value （SUVmax） of 18 F-FDG and its imaging characteristics, the diagnostic experience was summarized.[Results]PET-CT displayed a large amount of ascites with obscure FDG uptake, CT value ranged from 15 to 19 HU, SUVmax was 0.86, and contrast-enhanced CT showed that the asci- tes barely had enhancement. And the ascites demonstrated poor mobility when the patient examined in a different position. No obvious abdominal bowel activity was found. The liver edge was compressed in scallop shape, bowel loops were compressed and moved inside. There was no obvious thickening of the omentum and the mesenteric. No obvious enlargement of lymph nodes presented in the abdominal cavity. All these signs led to a imaging diagnosis of PMP. Postoperative pathology testified it as low-grade PMP. [Conclusion]PMP is relatively rare. PET-CT has a good diagnostic value for the disease.