Résumé
<p><b>OBJECTIVE</b>To study the clinicopathologic features of follicular dendritic cell sarcoma (FDCS) and its differential diagnosis.</p><p><b>METHODS</b>Ten cases of FDCS were studied by light microscopy, immunohistochemistry and in-situ hybridization. The clinical features and follow-up information were analyzed.</p><p><b>RESULTS</b>Amongst the 10 cases of FDCS studied, the male-to-female ratio was 1:1. The mean age of the patients was 42 years. Six of them were located in cervical and peritoneal lymph nodes and four in extranodal sites (including tonsil, pelvic cavity, tail of pancreas and spleen). Histologically, the tumor cells had whorled, storiform or diffuse growth patterns. They were spindle in shape and contained syncytial eosinophilic cytoplasm, with round or oval nuclei, vesicular chromatin, distinct nucleoli and a variable number of mitotic figures. Multinucleated tumor giant cells and intranuclear pseudoinclusions were occasionally seen. There was a sprinkling of small lymphocytes and neutrophils within the tumor as well as in the perivascular region. Immunohistochemical study showed that the tumor cells were diffusely or focally positive for CD21, CD23, CD35 and D2-40, but negative for LCA, CD20, CD3, CD1a, HMB45 and CK. Some of them showed EMA, CD68 and S-100 reactivity. In-situ hybridization for Epstein-Barr virus-encoded RNA (EBER) showed positive signals in only one case (which was diagnosed as inflammatory pseudotumor-like FDCS). Of the 7 patients with follow-up information available (duration: 2 months to 39 months; mean: 14 months), 2 cases with paraneoplastic pemphigus died of pulmonary infection at 5 and 7 months respectively. The remaining 5 patients were alive and disease-free after surgical excision (+/- chemotherapy and radiotherapy).</p><p><b>CONCLUSIONS</b>FDCS is a rare low to intermediate-grade malignant tumor. Appropriate application of FDC markers, such as CD21, CD35 and D2-40, would be helpful for arriving at a correct diagnosis. Most cases are associated with good prognosis after surgical treatment, with or without chemotherapy and radiotherapy. Patients with paraneoplastic pemphigus carry a less favorable prognosis.</p>
Sujets)
Adulte , Femelle , Humains , Mâle , Adulte d'âge moyen , Jeune adulte , Anticorps monoclonaux d'origine murine , Métabolisme , Sarcome folliculaire à cellules dendritiques , Métabolisme , Anatomopathologie , Chirurgie générale , Sarcome à cellules dendritiques interdigitées , Anatomopathologie , Diagnostic différentiel , Études de suivi , Lymphadénectomie , Noeuds lymphatiques , Anatomopathologie , Chirurgie générale , Méningiome , Anatomopathologie , Tumeurs du rhinopharynx , Anatomopathologie , Syndromes paranéoplasiques , Pemphigus , Récepteurs au C3b du complément , Métabolisme , Récepteurs au C3d du complément , Métabolisme , Récepteurs aux IgE , Métabolisme , Tumeurs de l'amygdale , Métabolisme , Anatomopathologie , Chirurgie généraleRésumé
Objective Research the correlation between expression of MMP-2 in colorectal cancer and patho- logical factors,or biological behaviors in colorectal cancer.Methods The expression of MMP-2 in 68 cases with col- orectal cancer were detected by immunohistochemical staining.Results The expression of MMP-2 in colorectal can- cer was not correlated with tumor region and histologic type,but related with depth of tumor invasion and metasta- sis.The frequency of positive cases in patients with colorectal cancer with of lymph,node metastasis was significantly higher than that in patients without lymph node metastasis(P
Résumé
OBJECTIVE@#To study the age, clinical, enteroscopic and pathological characteristics of colorectal polyps and factors affected polyp-carcinoma.@*METHODS@#We analyzed the clinical, enteroscopic and pathological characteristics of 7276 cases of colorectal polyps.@*RESULTS@#The incidence of colorectal polyps was 10.94%, including 521 men and 275 women. The rate of colorectal polyp was 82.29% in 30-69 year olds. The adenomatous, inflammatory, hyperplastic and juvenile polyps were 43.84%, 42.09%, 11.06% and 1.51%, respectively. Polypoid lesions were located at cecum 3.29%, ascending 11.88%, transverse 4.89%, descending 11.58%, sigmoid 26.05%, and rectum 42.32%. Thirty-five cases (4.4%) were found to have polpous canceration. The canceration rates in villous, mixed and tubular adenomas were 29.73%, 11.11%, and 4.86%. The rate of canceration seemed to depend on its dimensions, being 1.3%, 7.4%, and 25.6% for the 0.6 - 1.0 cm, 1.1 - 1.9 cm, and > or = 2.0 cm in size, respectively. Conclusion The ages between 30-69 tend to suffer from colorectal polyps. The incidence in the male is higher than that in the female. Colorectal polyps are more likely to locate in left colon. The common pathological types were adenomatous and inflammatory polyps. There is a high canceration of polyps in the left colon, villous adenomas and > or = 2.0 cm polyps. The broader the pedicles and the larger the diameters of polyps are, the higher the canceration rate. All of the colon polyps should be excised and undergo the pathological examination. Enteroscopic polypectomy helps prevent colorectal polpous canceration.