Prognostic significance of micropapillary pattern in pulmonary adenocarcinoma / 中华病理学杂志

<p><b>OBJECTIVE</b>To evaluate the prognostic significance of micropapillary pattern (MPP) in adenocarcinoma of lung.</p><p><b>METHODS</b>Ninety-one consecutively excised cases of pulmonary adenocarcinoma, including follow-up data, were retrospectively studied. These tumors were divided into 2 major groups: those with MPP and those without MPP. The former was further subdivided according to extent of the micropapillary component, as follows: MPP + (constituting 1% to 10% of the tumor), MPP ++ (constituting 11% to 30% of the tumor) and MPP +++ (constituting more than 30% of the tumor).</p><p><b>RESULTS</b>The overall 5-year survival rate was 64.8%. The 5-year survival rates were 88.9% for stage I tumors, 46.2% for stage II tumors, and 23.8% for stage III tumor respectively (P = 0.000). The extent of micropapillary component showed no correlation with tumor stage, size and 5-year survival rate (P = 0.065, 0.358 and 0.206, respectively). On the other hand, the 5-year survival rate was 41.5% for patients in the MPP-positive group (number = 41) and 84.0% for patients in the MPP-negative group (number = 50). The percentage of nodal metastasis in MPP-positive group was also higher than that in MPP-negative group (P = 0.000). In pulmonary adenocarcinoma, this characteristic histology correlated with tumor stage and size, but not with patient's gender and smoking history. Within the same stage, the 5-year survival rates of MPP-positive and MPP-negative groups were as follows: for stage I, 78.6% versus 92.6% (P = 0.1548), for stage II, 30.0% versus 100% (P = 0.0598), and for stage III, 17.7% versus 28.6% (P = 0.4045).</p><p><b>CONCLUSIONS</b>MPP in primary pulmonary adenocarcinoma, even when only constituting a minor component, predicts an aggressive clinical behavior and is associated with poor prognosis. Although it may not be an independent prognostic factor, presence of this histologic pattern should alert clinicians for more active treatment and closer follow up.</p>

A clinicopathological analysis of gastric lymphoma / 中华病理学杂志

<p><b>OBJECTIVE</b>To discuss the clinicopathological features and prognostic factors of gastric lymphoma.</p><p><b>METHODS</b>83 gastric lymphoma cases were analyzed retrospectively in accordance to the criteria of the new World Health Organization classification for neoplastic diseases of the hematopoietic and lymphoid tissues. The correlations between clinicopathological features, therapeutic measures and survival were discussed.</p><p><b>RESULTS</b>The age of patients ranged from 25 to 77, with a median of 52. The number of males were similar to that of females. There were no specific symptoms. The most common symptoms were stomach ache (60 cases, 72%) or discomfort. The duration of symptoms was often long and with a history of chronic gastric diseases (21 cases, 25%). 13 cases had multiple lesions in the gastrointestinal mucosa. 51 cases (61%) were accompanied by lymph node involvement. According to the new World Health Organization classification for neoplastic diseases of the hematopoietic and lymphoid tissues, 57 cases were extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT)-type (MALT lymphoma), 23 were diffuse large B cell lymphoma accompanying MALT lymphoma, 2 were diffuse large B cell lymphoma and 1 was follicular lymphoma. Of all the cases, 31 were stage I E, 38 stage II E, 8 stage III E and 6 stage IV by the Ann Arbor staging system (1972). The total 5-year and 10-year survival rates were 77.8% and 70.1% respectively, with the mean survival time of 146 months. The 5-year and 10-year survival rates of MALT lymphoma were 77.4% and 72.3%, the 5-year and 10-year survival rates of diffuse large B cell lymphoma accompanying MALT lymphoma were 81.8% and 68.2%, the 5-year survival rate of diffuse large B cell lymphoma was 50.0%.</p><p><b>CONCLUSIONS</b>There are no specific symptoms in gastric lymphoma patients. Extranodal marginal zone lymphoma of MALT-type is the main histopathological type of gastric lymphoma, often accompanied by multiple mucosa involvement and also often accompanied by a history of chronic gastric disease. The lesion is usually localized for a long time, with a very good prognosis. Survival rate has a significant correlation with lymph node involvement and clinical stage. No correlations were found between the survival rates with age, gender, B symptoms, invasive depth of the wall of stomach, the size and range of the tumors or different therapeutic measures.</p>

Establishment of immortalized cell line BLTR-4 and primary identification of its biological character / 中国医学科学院学报

<p><b>OBJECTIVE</b>To establish immortalized cell line from the urothelium of the urinary bladder and identify the characteristics of the cell line.</p><p><b>METHODS</b>Human papillomavirus 16 (HPV-16) plasmid was used to transfect urothelium of infant urinary bladder in vitro with the help of Fugene-6, and this plasmid contained E6 and E7 genes of HPV-16. We also identified the existence of HPV-16 E6 and E7 genes and the biological characteristics of the cell line by PCR, immunohistochemistry, and the biology identification.</p><p><b>RESULTS</b>BLTR-4 cell line, produced from the transfection of HPV-16K plasmid, was a cell line from urothelium with the expression of HPV-16 E6 and E7 genes. It had been cultured more than 70 passages, and the characteristics of growth was similar to the immortalized cell line as reported.</p><p><b>CONCLUSIONS</b>BLTR-4 cell line is an immortalized cell line from urothelium of the urinary bladder, which contains HPV-16 E6 and E7 genes. BLTR-4 cell line is a good experimental model to investigate the relationship of the infection of high risk HPV and transitional cell carcinoma (TCC) in vitro.</p>

Relationship between overexpression of the RIalpha subunit of the cAMP-dependent protein kinase and clinicopathological features of lung cancer / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To explore the relationship between the overexpression of PKA RIalpha mRNA and cliniopathological parameters in lung cancer.</p><p><b>METHODS</b>RT-PCR was used to detect the expression of PKA RIalpha mRNA in 54 cases with human lung cancer and matched normal tissues.</p><p><b>RESULTS</b>(1) The expression of PKA RIalpha mRNA was significantly higher in cancer tissue (66.7%) than in normal tissues (20.4%) (P < 0.01). (2) The expression was significantly correlated with TNM stage (P < 0.01), being increased with TNM stage. (3) The expression was significantly higher in patients with positive lymph nodes than in those with negative lymph nodes (P < 0.01). (4) There were no significant associations of PKA RIalpha mRNA expression with histological type, differentiation grade or size of the tumor.</p><p><b>CONCLUSION</b>This study indicates that the overexpression of PKA RIalpha mRNA may play an important role in the progression, metastasis and prognosis of lung cancer.</p>

TTF-1 expression and its diagnostic application in lung carcinomas / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To detect the expression of thyroid transcription factor 1 (TTF-1) and study its application in the diagnosis of lung carcinomas.</p><p><b>METHODS</b>Of 134 specimens from lung lobectomy, 105 were primary lung carcinomas including 76 non-small cell carcinomas (NSCLCs), 28 small cell lung cancers (SCLCs) and 1 complex carcinoma (SCLC and SCC), and 29 were metastatic carcinomas. Expression of TTF-1 was detected by immunohistochemistry. The expression level of TTF-1 was graded as, +:6% to 25% of tumor cells positive, ++:26% to 50%, +++:51% to 75%, and ++++:> 76%.</p><p><b>RESULTS</b>The positive nuclear immunoreactivity of TTF-1 was identified in 23 of 28 SCLCs (82.1%), but none in squamous cell cancer (SCC) (P < 0.001). The positive expression rate of TTF-1 in lung adenocarcinomas (ACs) was 73.8% (31/42). There was no correlation between TTF-1 expression and ACs differentiation or ACs subtypes (P > 0.05). All but one (thyroid follicular carcinoma) metastatic ACs were TTF-1-positive. Mesenchymal component and lymphoid or inflammatory cells were consistently TTF-1-negative.</p><p><b>CONCLUSION</b>A significant difference of TTF-1 expression may assist in distinguishing SCLC from SCC, lymphoma or inflammatory lesions. Owing to its restrictive expression in lung tissue, TTF-1 might be used to differentiate primary from metastatic adenocarcinoma of the lung.</p>

Detection of Epstein-Barr virus in T cell lymphoma and clinicopathologic analysis / 中华实验和临床病毒学杂志

<p><b>BACKGROUND</b>To study the relationship of Epstein-Barr virus (EBV) and T cell lymphoma.</p><p><b>METHODS</b>Sixty cases of T cell lymphomas were examined for the presence of EBV using in situ hybridization for EBV encoded RNA (EBERs).</p><p><b>RESULTS</b>EBERs were detected in tumor cells in 37(69.8%) of 53 cases with peripheral T cell lymphoma, but in none of seven cases of precursor T lymphoblastic lymphoma. The total detected EBERs were 37(61.6%) in 60 cases of T cell lymphomas. By Revised European-American Lymphoma(REAL) classification, EBERs were detected in 2/2 angioimmuno-blastic T cell lymphoma,17/18 angiocentric lymphoma, 4/6 anaplastic large cell lymphoma and 14/27 peripheral T cell lymphoma, unspecified (51.9%). The frequency of EBERs among the extranodal peripheral T cell lymphoma was higher than the nodal (P less than 0.01) there was no significant correlation with the sex, age and clinical stage.</p><p><b>CONCLUSIONS</b>This study indicated that high incidence of EBV was observed in peripheral T cell lymphoma, with predilection for angiocentric lymphoma and extranodal presentation.</p>