摘要
目的分析淋巴瘤侵犯腹部和盆腔淋巴结呈环形强化的CT表现，认识其较为少见的CT表现特点，提高诊断水平。方法回顾性分析14例经组织学证实的淋巴瘤侵犯腹部和（或）盆腔淋巴结在增强CT呈环形强化的影像特点，观察受累淋巴结的解剖分布、大小、形态及密度。其中非霍奇金淋巴瘤（NHL）12例，霍奇金淋巴瘤（HL）2例。结果呈环形强化的淋巴结依次分布在肾门上、下部腹膜后区（n=8），髂血管周围（n=8），腹腔（n=6）及肠系膜（n=3）。环形强化淋巴结的短径2～10cm（平均4．2cm）。9例淋巴结完全融合或融合为主，5例淋巴结孤立或孤立为主。13例同时有其他均匀强化的淋巴结，仅1例淋巴结全部为环形强化。11例强化环的形态规则、厚度基本一致，3例不规则、薄厚不一。13例强化环的密度高于肌肉，1例等于肌肉。11例中心低密度区的密度均匀，低于肌肉；3例内部密度不均，低于与等于肌肉密度区并存。结论淋巴瘤侵犯腹部和盆腔淋巴结呈环形强化时主要分布在肾门上、下部腹膜后区、髂血管周围、腹腔及肠系膜，常与均匀强化的淋巴结并存，以完全融合或融合为主，强化环形态规则且密度多高于肌肉，中心低密度区的密度多均匀且低于肌肉。
Objective To describe the uncommon manifestation of peripheral enhancement of abdominal and pelvic lymph nodes involved by lymphoma on CT. Methods Fourteen patients with lymphoma pathologically proved were reviewed. They were 12 non- Hodgkin＇s lymphoma （NHL） and 2 Hodgkin＇s disease （HD） cases. On enhanced CT, the peripheral enhancement of abdominal and pelvic lymph nodes was shown. Anatomic distribution, size, shape, and density of the nodes were analyzed. Results The most commonly involved sites of peripheral enhanced lymph nodes were retroperitoneum （superior and inferior to the renal hila, n=8）, ilium （n=8）, abdominal cavity （n =6） and mesentery （n=3）. The short dimension was 2-10 cm （median 4.2）. In one case all the nodes showed peripheral enhancement, and in the remaining 13 the nodes had both peripheral enhancement and homogenous appearance. In 9 cases the nodes were completely or largely confluent and in the other 5 cases the lesions were entirely or almost discrete. The density of the enhanced rims was higher than that of muscle （n=13） or iso-density to muscle （n=1）. The shape of the rims was regular （n=11 ） or irregular （n=3）. The central low-density area was homogenous and lower than muscular density （n=11 ） or heterogeneous and lower than or similar to the muscle （n=3）. Conclusion Peripheral enhanced lymph nodes involved by lymphoma of the abdominal and pelvic regions are commonly located in the retroperitoneal （superior and inferior to the renal hila）, iliac, abdominal and mesenteric regions, usually accompanied with homogenous lymph nodes, and completely or largely confluent changes. Usually, the lymph node has a regular rim-enhancement, which is marked than that of the muscle, and a central homogenous low-density
出处
《癌症进展》
2006年第2期131-135,162,共6页
Oncology Progress
