结直肠癌与自然杀伤细胞的相关性探讨北大核心

目的:研究结直肠癌及其配对的癌旁组织的自然杀伤(nature killer,NK)细胞数量及分布情况。方法:结直肠癌及其配对的癌旁组织各40例,以SP免疫组化法检测NK细胞。结果:结直肠癌及其配对的癌旁组织中均未检测到NK细胞的浸润。结论:结直肠癌及其配对的癌旁组织中缺乏NK细胞浸润可能与肿瘤微环境、生理微环境、未知的NK细胞亚型相关,结直肠癌患者可能不适用NK细胞进行免疫治疗。     

肝脏血管周上皮样细胞肿瘤的临床病理分析

目的 探讨肝脏血管周上皮样细胞肿瘤(PEComa)的临床病理学特征、诊断、鉴别诊断及预后.方法 报道2例发生于肝脏的PEComa,对2例少见部位PEComa行HE、免疫组化染色,并进行相关文献复习.结果 2例肝脏PEComa均发生于中年女性,45～53岁,临床均无特异性症状.CT分别显示肝右叶后下段和左顶叶部界限清楚的类圆形肿块,初诊考虑肝恶性肿瘤.镜下肿瘤主要由上皮样细胞和丰富血窦组成,1例无脂肪细胞成分,另1例伴多灶性脂肪细胞分化成分.免疫表型:肿瘤细胞均Melan-A、HMB45、SMA阳性.结论 发生于肝脏的PEComa临床较少见,组织起源仍然不清,临床需与原发性肝癌及转移性恶性黑色素瘤鉴别,大多生物学行为偏良性,诊断恶性需足够的证据支持和长期的随访观察.     

Endoscopic molecular imaging of early gastric cancer using fluorescently labeled human H-ferritin nanoparticle

Optical imaging technologies improve clinical diagnostic accuracy of early gastric cancer (EGC). However, there was a lack of imaging agents exhibiting molecular specificity for EGCs. Here, we employed the dye labeled human heavy-chain ferritin (HFn) as imaging nanoprobe, which recognizes tumor biomarker transferrin receptor 1 (TfR1), to enable specific EGC imaging using confocal laser endomicroscopy (CLE). TfR1 expression was initially examined in vitro in gastric tumor cells and in vivo through whole-body fluorescence and CLE imaging in tumor-bearing mice. Subsequently, dye labeled HFn was topically applied to resected human tissues for EGC detection. CLE analysis of TfR1-targeted fluorescence imaging allowed distinction of neoplastic from non-neoplastic tissues (P?<?0.0001), and TfR1 expression level was found to correlate with EGC differentiation degrees (P?<?0.0001). Notably, the CLE evaluation correlated well with the immunohistochemical findings (κ-coefficient: 0.8023). Our HFn-nanoprobe-based CLE increases the accuracy of EGC detection and enables visualization of tumor margins and endoscopic resection.     

IgG4‐related disease of the paratestis with the scrotal fluid: A case report

IgG4‐related disease (IgG4‐RD) can affect various organs, and the pancreas and salivary gland are representative examples. We report a rare case of IgG4‐RD of the paratestis. A 74‐year‐old man presented with left scrotal swelling. Scrotopuncture drainage and cytology confirmed a clear, yellow retention liquid (130 mL) with many small, similar lymphocytes and a few plasmacytes. Many lymphoid cells were immunopositive for CD3 on a cell block section, indicating that a predominant type of lymphoid cells was T cell. There were also some CD20 immunopositive cells and a few IgG4 immunopositive cells. Two months later the left scrotal swelling had returned, and he underwent radical inguinal orchiectomy. Microscopically, there was considerable lymphoplasmacytic inflammatory infiltration, fibrosis and abundant IgG4 immunopositive cells in the paratesticular region. The histopathologic and immunohistochemistry findings were consistent with IgG4‐RD. However, the abundant T cells in the scrotal fluid complicated the cytological diagnosis in our case.