Follicular dendritic cell sarcoma: a clinicopathologic analysis of ten cases / 中华病理学杂志

<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>

Effects of partial revascularization in elderly patients over 80 years old with coronary artery diseases / 南方医科大学学报

<p><b>OBJECTIVE</b>To observe the clinical effects of partial revascularization on elderly patients with coronary artery diseases(CAD) METHODS: Percutaneous coronary interventions (PCI) of the most likely culprit vessels were performed in 37 patients over 80 years old with multivessel coronary artery diseases (CAD).</p><p><b>RESULTS</b>The success rate of PCI was 100% in these elderly patients without serious complications. The in-hospital mortality rate was 2.7%, and all the other patients recovered and were discharged.</p><p><b>CONCLUSION</b>Partial revascularization for elderly CAD patients can achieve satisfactory clinical results, and close attention should be given to the heart and kidney function of these patients.</p>

Clinical analysis of 60 cases with malignant gastrointestinal stromal tumors / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate the clinicopathological characteristics, and treatment of malignant gastrointestinal stromal tumors (MGIST).</p><p><b>METHODS</b>Immunohistochemistry was used to detect CD117, CD34, S100, vimentin and SMA expressions. The postoperative curative effect was compared between the patients with or without imatinib treatment.</p><p><b>RESULTS</b>Radical resection was performed in 60 cases. Twenty-two tumors with a mean diameter of 5.3 cm were potentially malignant, and 38 tumor with a mean diameter of 9.2 cm were malignant. Microscopical examination revealed haemorrhagia or necrosis, abundant tumor cells, heteromorphism and caryocinesia of the tumors. 54 Cases were CD117 positive, 53 cases CD34 positive, 48 cases vimentin positive, 27 cases S100 positiveì16 cases SMA positive. The two-year recurrence rate was 80.5% in the patients without postoperative imatinib treatment, significantly higher than 21.1% in the patients with postoperative imatinib treatment(P< 0.05).</p><p><b>CONCLUSIONS</b>CD117 and CD34 markers are most valuable diagnostic indexes of MGIST, but its final diagnosis depends on pathology. Postoperative imatinib treatment is most effective to control recurrence and metastasis.</p>

Pathological analysis of breast carcinoma after silicone gel injection / 中华整形外科杂志

<p><b>OBJECTIVE</b>To explore the correlation between breast carcinoma and silicone gel injection for breast augmentation.</p><p><b>METHODS</b>Four cases of breast cancer after silicone gel injection were studied by means of clinical pathological analysis.</p><p><b>RESULTS</b>In the four women, breast lump of over 5 cm in diameter was found half year to 2 years after silicone injection. The tumor was misdiagnosed to inflammatory reaction of silicone gel injection. Definite diagnosis was made by histological examinations, which showed there was mucoid, light blue and well-distributed silicone gel among the nests of neoplasm cells. Lymph node metastasis of cancer cells was observed.</p><p><b>CONCLUSIONS</b>Silicone gel injection to the breast may be a reason for evoking or accelerating breast cancer. Breast cancer that occurred after breast augmentation with silicone gel injection could be misdiagnosed. Final diagnosis depends on biopsy. Silicone gel injection for breast augmentation should be abandoned.</p>

Pathological changes of lungs in patients with severity acute respiratory syndrome / 中华病理学杂志

<p><b>OBJECTIVE</b>To evaluate the progression in morphologic changes of lungs in SARS patients.</p><p><b>METHODS</b>Four cases of SARS with lung tissue samples available (including one for ultrastructural examination) were enrolled into the study. Histochemical study for VG, Masson, reticulin, orcein, PAS, sirius red stains and immunohistochemical study for vimentin, desmin, smooth muscle actin, HHF-35, CD34, F8, collagen types I and III were also performed.</p><p><b>RESULTS</b>According to the morphologic changes, lung lesions in SARS were subcategorized into 3 phases: acute exudative inflammation, fibrous proliferation and the final fibrotic stage. Two cases belonged to the acute exudative phase, in which the course was less than 20 days. The principal lesions consisted of acute alveolar exudative inflammation, hyperplasia of alveolar epithelium, necrosis, alveolar hyaline membrane formation, alveolar desquamation and focal fibroplasia. The acute exudative protein was PAS-positive. There was an increase in reticulin fiber formation. The reactive fibroblasts were highlighted by desmin and vimentin. One case belonged to the fibroproliferative stage, in which the course was around 25 days. Major lesions included proliferative interstitial pneumonia with early pulmonary fibrosis. There was also evidence of organizing pneumonia, with an increase in reticulin fiber formation, which had a glomeruloid appearance on special stain. The mesenchymal cells showed either myofibroblastic (which expressed desmin, HHF-35, smooth muscle actin and vimentin) or fibroblastic (which expressed vimentin only) differentiation. Fibroelastosis and fibroplasia was also noted. The remaining case belonged to the fibrotic stage, in which the course was around 75 days. The main features included diffuse fibrosis and honeycomb change, which were highlighted by sirius red stain. Immunohistochemistry showed mainly types I and IV collagen fibers. In all lesions, there was also an increase of number of CD68-positive macrophages.</p><p><b>CONCLUSIONS</b>The morphologic progression in lungs of SARS patients is characterized by the development of increased fibrosis. The primitive mesenchymal cells, hyperplastic alveolar epithelial cells and macrophages play an important role in the pathogenesis.</p>