Immunohistochemical characterization of cellular infiltrates in squamous cell carcinoma and Bowen's disease occurring in one patient.

We investigated populations of the infiltrating cells in Bowen's disease (BD) and squamous cell carcinoma (SCC), both of which arose in the same patient, using the Avidin-Biotin-peroxidase complex method with eight monoclonal antibodies. T lymphocytes were most predominant among infiltrating cells; NK cells, B cells, and monocytes were rarely seen in either BD or SCC. Analysis of subsets of the infiltrating T lymphocytes revealed that the number of suppressor/cytotoxic (s/c) T cells was twice that of helper/inducer (h/i) T cells in BD, while the number of s/c T cells was lower than that of h/i T cells in SCC. The immunohistochemical results in the present case differed from those of predominant infiltration of h/i T cells and of s/c T cells in three other reports of BD and SCC. These results suggest that the population of the cellular infiltrates may be modulated by the nature of tumors and by the immuno-competent state of the hosts.     

Response of quiescent and total tumor cells in solid tumors to neutrons with various cadmium ratios

Purpose: Response of quiescent (Q) and total tumor cells in solid tumors to neutron irradiation with three different cadmium (Cd) ratios was examined. The role of Q cells in tumor control was also discussed.Methods and Materials: C3H/He mice bearing SCC VII tumors received continuous administration of 5-bromo-2′-deoxyuridine (BrdU) for 5 days using implanted mini-osmotic pumps to label all proliferating (P) cells. Thirty minutes after intraperitoneal injection of sodium borocaptate-¹⁰B (BSH), or 3 h after oral administration of dl-p-boronophenylalanine-¹⁰B (BPA), the tumors were irradiated with neutrons, or those without ¹⁰B-compounds were irradiated with gamma rays. This neutron irradiation was performed using neutrons with three different cadmium (Cd) ratios. The tumors were then excised, minced, and trypsinized. The tumor cell suspensions were incubated with cytochalasin-B (a cytokinesis-blocker), and the micronucleus (MN) frequency in cells without BrdU labeling (Q cells) was determined using immunofluorescence staining for BrdU. The MN frequency in total (P + Q) tumor cells was determined from tumors that were not pretreated with BrdU. The sensitivity to neutrons was evaluated in terms of the frequency of induced micronuclei in binuclear tumor cells (MN frequency).Results: Without ¹⁰B-compounds, the MN frequency in Q cells was lower than that in the total cell population. The sensitivity difference between total and Q cells was reduced by neutron irradiation. Relative biological effectiveness (RBE) of neutrons compared with gamma rays was larger in Q cells than in total cells, and the RBE values for low-Cd-ratio neutrons tended to be larger than those for high-Cd-ratio neutrons. With ¹⁰B-compounds, MN frequency for each cell population was increased, especially for total cells. This increase in MN frequency was marked when high-Cd-ratio neutrons were used. BPA increased the MN frequency for total tumor cells more than BSH. Nevertheless, the sensitivity of Q cells treated with BPA was lower than that in BSH-treated Q cells. This tendency was clearly observed in high-Cd-ratio neutrons.Conclusion: From the viewpoint of enhancing the Q-cell sensitivity, tumors should be irradiated with high-Cd-ratio neutrons after BSH administration. However, normal tissue reaction remains to be examined because of its low tumor-to-normal tissue and tumor-to-blood biodistribution ratios.     

Association between epstein barr virus and tongue squamous cell carcinoma in iranian patients

Detection of Epstein-Barr virus in oral squamous cell carcinoma suggests its involvement in the carcinogenesis of oral cavity. But, there are few studies on the incidence of EBV genome in squamous cell carcinomas at specific locations in the oral cavity like tongue and with different tumor progression. In this study the presence of EBV genome in tongue Squamous Cell Carcinoma (TSCC) in Iranian patients were investigated. Accordingly, a total of 94 cases with TSCC were firstly analyzed for the presence of viral genome through Nested PCR. Patients were divided into different groups based on their gender and the size, nodal involvement, grade and stage of their tumor. Results showed the presence of EBV genome in 72.3% of TSCCs with no significant difference between two genders, although slightly higher in females. Interestingly, PCR products of EBV genome showed a statistically significant higher distribution in TSCCs at IVa stage (p = 0.04), while a considerable low involvement of EBV genome was seen in T1-sized tumors. The result of this study further emphasizes the role of EBV in oral SCCs – mainly at tongue. This is the first investigation to clarify the association between EBV genome and different tumor size and stage in TSCCs; however, more studies in different regions and larger populations should be performed to be able to draw a firmed conclusion.     

银黄口服液联合头孢唑林钠治疗老年急性上呼吸道感染的临床研究

目的评价银黄口服液联合头孢唑林钠治疗老年急性上呼吸道感染的临床疗效。方法选取2016年9月—2017年9月四川大学华西医院收治的161例老年急性上呼吸道感染患者,根据用药差别分成对照组(80例)和治疗组(81例)。对照组患者静脉滴注注射用头孢唑林钠,1.0 g注射用头孢唑林钠溶于250 mL生理盐水,2次/d。治疗组患者在对照组治疗基础上口服银黄口服液,10 mL/次,3次/d。两组患者均连续治疗7 d。观察两组的临床疗效,比较两组患者临床症状消失时间、症状评分、血清鳞状细胞癌抗原(SCC)、超敏C反应蛋白(hs-CRP)及白细胞百分比的情况。结果治疗后,对照组和治疗组的总有效率分别是86.25%、96.30%,两组比较差异具有统计学意义(P0.05)。治疗后,两组患者血清SCC、hs-CRP及淋巴细胞百分比水平均较治疗前明显降低,同组治疗前后比较差异有统计学意义(P0.05);治疗后治疗组SCC、hs-CRP及淋巴细胞百分比显著低于对照组,两组比较差异具有统计学意义(P0.05)。治疗后,治疗组患者退热时间、咽喉肿胀消退时间均明显短于对照组,两组比较差异具有统计学意义(P0.05)。治疗后,两组患者症状积分均较治疗前显著降低,同组治疗前后比较差异有统计学意义(P0.05);治疗后治疗组症状积分显著低于对照组,两组比较差异具有统计学意义(P0.05)。结论银黄口服液联合头孢唑林钠治疗老年急性上呼吸道感染具有较好的临床疗效,能显著改善患者临床症状,减轻患者炎症程度,具有一定的临床推广应用价值。     

First report of squamous cell carcinoma arising within an intraoral radial forearm free flap

INTRODUCTIONOral epithelial dysplasia within free tissue reconstructions of the oral cavity has been reported. We report a case where squamous carcinoma arose within radial forearm skin transferred to the oral cavity 23 years previously. After a thorough literature search we believe this is the first report of such a phenomenon.PRESENTATION OF CASEA 62-year-old man presented to our service with pain and a new mass in the left floor of mouth. The floor of mouth had been reconstructed with a radial forearm free flap (RFFF) 23 years earlier following resection of a mucosal squamous cancer. This new mass was within the reconstruction tissue. Biopsy showed multiple areas of dysplasia and a single new focus of invasive carcinoma. This new tumour was excised and reconstructed with a contralateral nasolabial flap. Formal histology showed an arrector pili muscle adjacent to invasive cancer. Some years earlier dysplasia had been noted in the free flap skin component.DISCUSSIONThe skin component of free tissue transfer reconstruction flaps has been shown to develop epithelial dysplastic change. This has been found to be associated with similar levels of p53 mutation and increased Ki-67 expression within this intraoral skin and adjacent dysplastic mucosa. Our case demonstrates similar levels of expression of mutated p53 and Ki-67 in in situ epithelium and in invasive tissue perhaps supporting the idea of expansion of premalignant cells into the skin flap epidermis.CONCLUSIONWe have shown for the first time that a new SCCa has developed within the cutaneous component of a free tissue transfer flap. With improved longevity of patients treated with primary surgery for oral cavity SCCa there is need for vigilance in monitoring for this cancer recurrence site.