Radiation-induced xerostomia and cariogenic dietary habits.

PURPOSE: Despite the availability of various prevention methods, dental caries continue to be diagnosed in patients receiving head and neck radiotherapy (RT). Since conventional approaches do not evaluate posttreatment alterations in dietary behaviors, we aimed to assess the influence of radiation-induced xerostomia on post-RT cariogenic dietary habits in patients. METHODS: Fifty-seven patients completed the Xerostomia Questionnaire (XQ) and answered questions regarding daily cariogenic food and beverage (CFB) intake, daily tooth brushing, fluoride application, and subjective total taste acuity (STTA). They also underwent evaluations to determine the Simplified Oral Hygiene Index (OHI-S) score, Saxon test score, number of decayed-missing-filled teeth (DMFT), and proportion of DMFT to the test teeth (DMFT rate). Clinical records were searched for information regarding RT modalities, including the median of the mean dose to the parotid glands, days after the completion of RT, submandibular gland resection, whole-neck irradiation, and the DMFT value and rate before RT. The patients were divided into low and high XQ score groups based on the median XQ score of 47.5 for the two sample tests. Univariable and multivariable regression analyses were used to identify independent factors for frequent CFB intake. RESULTS: Higher XQ scores were associated with a significantly greater frequency of CFB intake (p = 0.028*). Regression analysis also identified a higher XQ score (p = 0.017*) as an independent risk factor for frequent CFB intake. CONCLUSION: Radiation-induced xerostomia increased the frequency of CFB intake.

Oral adverse events due to zinc deficiency after pancreaticoduodenectomy requiring continuous intravenous zinc supplementation: a case report and literature review.

BACKGROUND: Zinc is mainly absorbed in the duodenum and proximal jejunum, which are removed during pancreaticoduodenectomy (PD). Little is known about the adverse oral events and skin disorders caused by zinc deficiency after PD. Herein, we reviewed studies on the development of zinc deficiency after PD and reported about a patient with zinc deficiency after PD who required home intravenous zinc replacement. CASE PRESENTATION: A 73-year-old woman with glossitis, taste disorder, and acrodermatitis enteropathica-like eruption on her fingers presented to the Division of Dentistry and Oral Surgery 69 days after PD. Her serum zinc level markedly decreased to 30 µg/dL. Oral zinc administration was inadequate to treat hypozincemia after PD; therefore, multi-trace elements were injected intravenously during readmission. Her serum zinc levels recovered, and her lesions gradually improved. Furthermore, a central venous port was implanted to maintain normal serum zinc levels, and she continued self-injecting zinc at home. CONCLUSIONS: Zinc deficiency after PD rarely occurs. The clinical oncologist community, including dentists responsible for the oral care of cancer patients, should be aware of the oral adverse events, such as dysgeusia, glossitis, and oral pain, associated with zinc deficiency after cancer surgery and that induced by chemotherapy or head and neck radiation therapy.

[Medical-Dental Collaboration for Oral Supportive Care of Cancer Patients].

Cancer patients often have oral complications during cancer therapies that can be followed by various systemic complications. If these oral complications remain untreated and worsen, cancer treatment has to be postponed or suspended. In recent years, the importance of oral supportive care for cancer patients has been recognized and that medical-dental collaboration is the key to solving these problems. Close cooperation between medical and dental professionals will prevent oral complications, and so treatment can continue without delay or hindrance. Also, the quality of life of the cancer patient can be improved. Many current anticancer drug treatments are performed as outpatient treatments. However, the number of dentists working in hospitals is small and it is difficult for them to manage all cancer patients. Therefore, oral supportive care in hospital dentistry is not sufficient and patients have to see a local dentist. It is highly recommended that the patient has a "family dentist"and undergo regular oral examinations and dental care. In Japan, the Japan Dental Association has established a regional dentist cooperation system to seamlessly provide appropriate oral supportive care to cancer patients. The policy is to provide patients with continuous oral supportive care not only before the start of treatment, but also during and after treatment. In addition, hospital professionals and family dentists work together to exchange information and provide support and dental care for oral problems, depending on the status of cancer treatment and the needs of the patient.

Risk factors for aspiration pneumonia during concurrent chemoradiotherapy or bio-radiotherapy for head and neck cancer.

BACKGROUND: Aspiration pneumonia is one of the most important side effects of chemoradiotherapy (CRT) and bio-radiotherapy (BRT) in patients with head and neck cancer (HNC). Aspiration pneumonia can lead to cancer-related mortality in HNC patients. However, the relationship between aspiration pneumonia occurring during CRT or BRT for HNC and treatment outcomes in HNC patients is not well characterized. In this study, we assessed the influence of aspiration pneumonia on treatment outcomes and sought to identify the clinical risk factors for aspiration pneumonia during definitive CRT and BRT in HNC patients. METHODS: We retrospectively assessed the data pertaining to patients with locally advanced HNC who received definitive CRT or BRT at the Shizuoka Cancer Center between August 2006 and December 2016. RESULTS: Among the 374 HNC patients who received CRT or BRT, 95 (25.4%) developed aspiration pneumonia during treatment. Aspiration pneumonia was significantly associated with therapeutic response to CRT or BRT (multivariate adjusted odds ratio for complete response, 0.52, p = 0.020) and poor overall survival (multivariate adjusted hazard ratio for overall survival, 1.58, p = 0.024). The multivariate analyses identified four independent factors for aspiration pneumonia: poor oral hygiene, high N-classification, hypoalbuminemia before treatment, and inpatient treatment. CONCLUSIONS: Aspiration pneumonia occurring during CRT or BRT has a detrimental effect on the therapeutic response and survival of HNC patients. Careful attention should be paid to these risk factors for aspiration pneumonia in HNC patients undergoing CRT or BRT.

The post hoc analysis comparing the severity grades of chemoradiotherapy-induced oral mucositis scored between the central and local assessors in a multicenter, randomized controlled trial of rebamipide for head and neck cancer.

BACKGROUND: In the treatment of head and neck cancer, severity of chemoradiotherapy-induced oral mucositis has been recognized as one of the key factors affecting the outcomes of the anticancer therapies. Therefore, the development of treatments mitigating oral mucositis would be of clinical significance, although the adequate assessment procedure for efficacy evaluation remains to be established. We conducted this post hoc study to assess the effect of objective evaluation of the severity grade on the outcomes of the clinical trial. METHODS: In the original trial with rebamipide liquids (0, 2, and 4%) for chemoradiotherapy-induced oral mucositis, the investigators in local sites and independent central review separately determined the severity grades in accordance with Common Terminology Criteria of Adverse Events version 3.0 based on the Assessment Sheet scored by the investigators. The discordance in severity grades between the investigators and central review was analyzed on cross table. RESULTS: The analysis revealed the discordance rate over the trial was 34%. While the incidences of severe oral mucositis in the placebo, rebamipide 2%, and 4% groups evaluated by the central review were 39%, 29%, and 25%, respectively, the respective values in the investigator's evaluation were 32%, 39%, and 44%. CONCLUSION: In the clinical trial for the treatment of oral mucositis, it was strongly suggested that objective evaluation with a consistent scale would be required.

Prospective phase II study evaluating the efficacy of swallow ability screening tests and pneumonia prevention using a team approach for elderly patients with gastric cancer.

BACKGROUND: Aging partly impairs swallowing function, which is considered a risk factor for postoperative pneumonia (PP). We evaluated the efficacy of a new team-based strategy to reduce the incidence of PP in elderly patients with gastric cancer. METHODS: This single-center, prospective phase II study included elderly patients (≥75 years old) with gastric cancer undergoing gastric surgery. The primary endpoint was the incidence of Clavien-Dindo grade II or higher PP. Patients were initially screened using three swallowing function screening tests: a symptom questionnaire, the modified water swallow test (MSWT), and the repetitive saliva swallowing test (RSST). All patients were provided standard preoperative oral checks and care and simple neck muscle training. For patients who screened positive, a videofluorographic swallowing study was performed; if an abnormality was found, the patient was given intensive swallowing rehabilitation both pre- and postoperatively. RESULTS: Of 86 eligible patients enrolled, PP developed in 3 (3.5%). The 60% confidence interval of 1.8-6.3% had an upper limit below the prespecified threshold of 7.8%. Positive screening results were found for 19 patients (22.1%) on the symptom questionnaire, 3 (3.5%) on the MSWT, and 1 (1.2%) on the RSST. PP was not observed in any patients who screened positive. CONCLUSION: In conclusion, although the screening tests we adopted here were not sufficient to identify patients at high risk of aspiration pneumonia, perioperative interventions using a team approach might be effective in reducing the incidence of PP in elderly patients with gastric cancer.

A phase II study of HMB/Arg/Gln against oral mucositis induced by chemoradiotherapy for patients with head and neck cancer.

PURPOSE: This phase II trial assessed the clinical benefit of beta-hydroxy-beta-methylbutyrate, arginine, and glutamine (HMB/Arg/Gln) for preventing chemoradiotherapy (CRT)-induced oral mucositis (OM) in patients with head and neck cancer (HNC). METHODS: Patients with HNC receiving definitive or postoperative cisplatin-based CRT were enrolled. HMB/Arg/Gln was administered orally or per percutaneous endoscopic gastrostomy from the first day of CRT up to its completion. All patients received opioid-based pain control and oral care programs that we previously reported. The primary endpoint was the incidence of grade ≥ 3 OM (functional/symptomatic) according to the Common Terminology Criteria of Adverse Events version 3.0. Quality of life (EORTC QLQ-C30/PROMS) at baseline and upon radiotherapy at a dosage of 50 Gy were assessed. RESULTS: Thirty-five patients with HNC were enrolled. Sixteen of them (45.7%) developed grade ≥ 3 OM (i.e., functional/symptomatic). The incidence of grade ≤ 1 OM (functional/symptomatic) was 51.5% at 2 weeks and 82.9% at 4 weeks after radiotherapy completion. Clinical examination revealed that 10 patients (28.6%) developed grade ≥ 3 OM. The incidence of grade ≤ 1 OM (clinical exam) was 80.0% at 2 weeks and 100% at 4 weeks after radiotherapy completion. Adverse events related to HMB/Arg/Gln were an increase in blood urea nitrogen and diarrhea, but were easily managed. CONCLUSIONS: The addition of HMB/Arg/Gln to opioid-based pain control and oral care programs was feasible but still insufficient at reducing the incidence of CRT-induced severe OM. However, the benefit of HMB/Arg/Gln should not be neglected given the findings of clinical examinations and the rapid recovery from severe OM. TRIAL REGISTRATION: UMIN000016453.

Risk factors for aspiration pneumonia after definitive chemoradiotherapy or bio-radiotherapy for locally advanced head and neck cancer: a monocentric case control study.

BACKGROUND: Chemoradiotherapy (CRT) and bio-radiotherapy (BRT) are recognized as standard therapies for head and neck cancer (HNC). Aspiration pneumonia after CRT or BRT is a common late adverse event. Our aim in this study was to evaluate the cause-specific incidence of aspiration pneumonia after CRT or BRT and to identify its clinical risk factors. METHODS: We performed a retrospective analysis of 305 patients with locally advanced HNC treated by CRT or BRT between August 2006 and April 2015. RESULTS: Of these 305 patients, 65 (21.3%) developed aspiration pneumonia after treatment. The median onset was 161 days after treatment. The two-year cause-specific cumulative incidence by CRT or BRT was 21.0%. Multivariate analysis revealed five independent risk factors for aspiration pneumonia, namely, habitual alcoholic consumption, use of sleeping pills at the end of treatment, poor oral hygiene, hypoalbuminemia before treatment, and the coexistence of other malignancies. A predictive model using these risk factors and treatment efficacy was constructed, dividing patients into low- (0-2 predictive factors), moderate- (3-4 factors), and high-risk groups (5-6 factors), the two-year cumulative incidences of aspiration pneumonia of which were 3.0, 41.6, and 77.3%, respectively. Aspiration pneumonia tended to be associated with increased risk of death, although this was not statistically significant (multivariate-adjusted hazard ratio 1.39, P = 0.18). CONCLUSION: The cause-specific incidence and clinical risk factors for aspiration pneumonia after definitive CRT or BRT were investigated in patients with locally advanced HNC. Our predictive model may be useful for identifying patients at high risk for aspiration pneumonia.

Prognostic Factors and Multidisciplinary Postoperative Chemoradiotherapy for Clinical T4a Tongue Cancer.

OBJECTIVE: The prognosis of patients with locally advanced squamous cell carcinoma (SCC) of the tongue is poor. Postoperative chemoradiotherapy (CRT) improves locoregional control and survival in high-risk patients. We investigated the prognostic factors for clinical T4a tongue SCC, and elucidated whether postoperative CRT has a benefit for patients with poor prognosis in terms of survival. METHODS: We performed a retrospective analysis of 61 patients with stage T4a SCC of the tongue who underwent primary resection and neck dissection. RESULTS: The median follow-up was 53.8 months. Multivariate analysis revealed a 4.26× relative risk of death for patients with the involvement of ≥5 regional lymph nodes (pN ≥5) compared with those with pN 0-4 (p = 0.002). In Kaplan-Meier analysis, patients with pN ≥5 who received CRT had longer overall survival rates than those who did not (hazard ratio = 0.31; p = 0.041). CONCLUSIONS: pN ≥5 is the most powerful prognostic factor for clinical T4a SCC of the tongue. Postoperative CRT is recommended in patients with pN ≥5.

Multicenter phase II study of an oral care program for patients with head and neck cancer receiving chemoradiotherapy.

PURPOSE: This multicenter phase II trial assessed the clinical benefit of a multidisciplinary oral care program in reducing the incidence of severe chemoradiotherapy-induced oral mucositis (OM). METHODS: Patients with head and neck cancer (HNC) who were scheduled to receive definitive or postoperative chemoradiotherapy were enrolled. The oral care program included routine oral screening by dentists and a leaflet containing instructions regarding oral care, nutrition, and lifestyle. Oral hygiene and oral care were evaluated continuously during and after the course of chemoradiotherapy. The primary endpoint was the incidence of grade ≥3 OM assessed by certified medical staff according to the Common Terminology Criteria of Adverse Events version 3.0. RESULTS: From April 2012 to December 2013, 120 patients with HNC were enrolled. Sixty-four patients (53.3 %) developed grade ≥3 OM (i.e., functional/symptomatic). The incidence of grade ≤1 OM at 2 and 4 weeks after radiotherapy completion was 34.2 and 67.6 %, respectively. Clinical examination revealed that 51 patients (42.5 %) developed grade ≥3 OM during chemoradiotherapy. The incidence of grade ≤1 OM at 2 and 4 weeks after radiotherapy completion was 54.7 and 89.2 %, respectively. The incidences of grade 3 infection and pneumonitis throughout chemoradiotherapy were <5 %. Only 6.7 % of patients had unplanned breaks in radiotherapy, and 99.2 % completed treatment. CONCLUSIONS: A systematic oral care program alone is insufficient to decrease the incidence of severe OM in patients with HNC being treated with chemoradiotherapy. However, systematic oral care programs may indirectly improve treatment compliance by decreasing infection risk. TRIAL REGISTRATION NUMBER: UMIN000006660.

Distinctive mucositis and feeding-tube dependency in cetuximab plus radiotherapy for head and neck cancer.

OBJECTIVE: Prophylactic percutaneous endoscopic gastrostomy may be considered before chemoradiotherapy for patients with locally advanced head and neck squamous cell carcinoma, because severe mucositis is a common complication. We evaluated the mucosal findings and necessity of prophylactic percutaneous endoscopic gastrostomy in patients with head and neck squamous cell carcinoma receiving cetuximab and radiotherapy. METHODS: Fourteen consecutive patients with locally advanced head and neck squamous cell carcinoma receiving cetuximab and radiotherapy were analyzed. RESULTS: Patients' backgrounds were as follows: male/female, 8/6; median age, 64.5 years (range, 35-83 years); performance status, 0/1, 9/5. Primary tumor sites included the oropharynx, hypopharynx and larynx in four, seven and three patients, respectively. Patients completed a median of eight cetuximab cycles. All patients received three-dimensional conformal radiotherapy (median dose, 70 Gy). Thirteen patients were treated with elective neck irradiation at the ipsilateral (n = 3) or bilateral (n = 10) nodes. Grade ≥ 3 mucositis/stomatitis (clinical examination) occurred in 85.7% patients (n = 12). The median irradiation dose was 33 Gy at the Grade 3 mucositis onset. Eight patients showed mucositis with distinctive features, a wide range of white-coated lesions with a clear border; hypopharyngeal atresia was observed in two patients. Prophylactic percutaneous endoscopic gastrostomy was performed in 11 patients, and 11 patients (78.6%) actually required nutritional support because of Grade ≥ 3 mucositis/stomatitis (functional/symptomatic). CONCLUSIONS: Prophylactic percutaneous endoscopic gastrostomy is recommended because most patients receiving cetuximab and radiotherapy for locally advanced head and neck squamous cell carcinoma have Grade ≥ 3 mucositis with distinctive features.

Multidisciplinary tumor board for head and neck cancer from the perspective of medical oncologists-optimizing its effectiveness.

Head and neck cancer (HNC) treatment is becoming increasingly multidisciplinary, and patient characteristics vary. Therefore, a multidisciplinary tumor board (MTB) is essential in clinical practice. This review provides insights into the benefits and tips for improving head and neck MTB from the perspective of medical oncologists. The MTB is a platform to discuss the optimal application of the standard of care to each case, reach a consensus, and establish a recommendation to support patients' decision-making. A productive and educational MTB also provides an opportunity to share information on ongoing clinical trials with physicians. Case presentations should be systematic to discuss all new and challenging cases before, during, and after the treatment. Human resource development, particularly of head and neck medical oncologists, is crucial. The type of multidisciplinary network between medical staff and the extent of patient intervention differs among MTB teams. Subsequently, a virtual MTB can establish a medical network between institutions that will contribute to the equalization and centralization of head and neck oncologic care.

Clinicopathological Features of Buccal Squamous Cell Carcinoma with Focus on Patients Who Never Smoke and Never Drink.

Introduction Oral carcinoma has been reported at a substantial proportion in patients who never smoke and never drink. However, the proportion may vary by subsite and ethnicity. Objective We aimed to determine the clinicopathological features of buccal squamous cell carcinoma (SCC) in a Japanese population. Methods We retrospectively analyzed the records of patients diagnosed with buccal SCC at our institution from September 2002 to November 2015. We reviewed the gender, age, tumor status, treatment, smoking, alcohol drinking, multiple primary cancers, and prognosis of the patients. The overall and cause-specific survival rates were calculated, and the effects of clinicopathological variables were assessed by univariate analysis. Furthermore, the cause of death was evaluated. Results Among the 63 patients (men: 38; women: 25) included in the present study, 29 (46.0%) never smoked or drank. Women were almost 5 years older than men ( p = 0.014). The number of women in the group who never smoked or drank was disproportionately higher than that of those in the smoker or drinker groups ( p < 0.001). In total, 29 patients (46.0%) had 59 multiple primary cancers, including 26 oral cancers. Surgeries and radiotherapy were performed in 57 (90.5%) and 6 (9.5%) cases, respectively. The 5-year overall survival and disease-specific survival rates were 74.6 and 78.8%, respectively. Conclusion Our study confirms that buccal SCC may develop in older adult Japanese patients, especially in women who have never smoked or drank. These patients could be at risk for second primary malignancy.

A Novel Risk Model for Predicting Dysphagia after Tongue Reconstruction: A Retrospective Multicenter Study in Japan.

BACKGROUND: There is no consensus on the postoperative outcomes of tongue reconstruction. Therefore, the authors developed a novel risk model for predicting dysphagia after tongue reconstruction. METHODS: This retrospective study was conducted by the Oral Pharyngeal Esophageal Operation and Reconstruction Analytical, or OPERA, group across 31 cancer centers and university hospitals in Japan. A total of 532 patients [390 (73.3%) men and 142 (26.7%) women; median age at surgery, 60 years (range, 15 to 88 years)] who were diagnosed with oral tongue squamous cell carcinoma and underwent tongue reconstruction following glossectomy between 2009 and 2013 were included. Independent risk factors were identified using univariate regression analysis and converted to a binary format for multivariate analysis. An integer value was assigned to each risk factor to calculate a total score capable of quantifying the risk of feeding tube dependence. RESULTS: Overall, 54 patients (10.2%) required a feeding tube at the time of evaluation. Predictive factors for feeding tube dependence were advanced age, lower American Society of Anesthesiologists physical status, low body mass index, lower serum albumin, comorbid hypertension and diabetes, extended tongue defect, resection beyond the tongue, laryngeal suspension, postoperative radiation therapy, and no functional teeth. In multivariate logistic regression analysis, age greater than or equal to 58.5 years, postoperative radiation therapy, wider tongue defect, and body mass index less than 21.27 kg/m 2 earned 6, 4, 3, and 2 points, respectively, for a maximum total score of 15. CONCLUSION: The authors' risk model provides a mathematical tool for estimating the individual risk of postoperative feeding tube dependence before tongue reconstruction. CLINICAL QUESTION/LEVEL OF EVIDENCE: Risk, III.

Examination of a nutritional treatment pathway according to pretreatment health status and stress levels of patients undergoing hematopoietic stem cell transplantation.

INTRODUCTION: This study aimed to validate hematopoietic stem cell transplantation (HSCT) treatment via a tailored nutritional pathway in myeloablative conditioning (MAC), determine its efficacy in terms of remission, and explore associations between clinical outcomes and nutritional indicators. METHODS: We included patients who underwent MAC for HSCT at the Shizuoka Cancer Center Stem Cell Transplantation between 2015 and 2019. We evaluated outcomes from the day before treatment initiation (transplant date: day 0) to day 42. RESULTS: Among the 40 MAC cases (participant characteristics: 20/40 males, mean age of 52 years, and mean body mass index of 21.9 kg/m2), we found that the percent loss of body weight and loss of skeletal muscle mass were correlated with the basal energy expenditure rate (BEE rate; r = 0.70, p<0.001 and r = 0.49, p<0.01, respectively). Based on the receiver operating characteristics curves, the cutoff value for the BEE rate in terms of weight loss was 1.1. Salivary amylase levels did not significantly change during the treatment course. Continuous variables, including oral caloric intake and performance status, showed statistically significant correlations with nutrition-related adverse events during treatment (r = -0.93, p<0.01 and r = 0.91, p<0.01, respectively). Skeletal muscle mass before treatment initiation was an independent predictive variable for reduced 2-year survival (p = 0.04). CONCLUSION: Our results support the validity of a safe nutritional pathway with a BEE rate of 1.1 for HSCT patients pretreated with MAC. Specifically, we found that this pathway could prevent weight loss in response to nutrition-related adverse events. Skeletal muscle mass before treatment was identified as an independent risk factor for reduced 2-year survival.

The Effect of Improving Oral Hygiene through Professional Oral Care to Reduce the Incidence of Pneumonia Post-esophagectomy in Esophageal Cancer.

Radical esophagectomy for thoracic esophageal cancer is invasive and frequently results in postoperative pulmonary complications. Postoperative pneumonia is the most common such complication and affects hospital mortality and survival rates. Oral care has been very effective in reducing pneumonia. In Japan, preoperative professional oral care is highly recommended. However, there are few studies on the effect of preoperative improvements in oral hygiene as a result of intervention on the incidence of postoperative pneumonia. The primary end-point of this retrospective study was the incidence of postoperative pneumonia after radical esophagectomy. The oral health levels of 46 patients were individually categorized, and then patients were grouped according to whether they maintained or improved their oral hygiene. At the first dental examination, oral health levels were classified as good in 22 patients and bad in 24. Of the 46 patients studied, 39 patients maintained or improved their oral hygiene (good control group), whereas 7 showed no improvement (bad control group). Postoperative pneumonia occurred in eight patients: four in the good control group and four in the bad control group. Statistical analysis with postoperative pneumonia as a dependent variable showed a significant effect of oral hygiene improvement on the incidence of pneumonia. Logistic regression analysis with this factor as an independent variable demonstrated that the risk of postoperative pneumonia was reduced in the good control group (OR 0.086, 95% CI 0.014-0.529). Therefore, preoperative professional oral care may improve oral hygiene and oral health, which may in turn reduce the incidence of postoperative pneumonia.

Cystadenoma of the palate: immunohistochemistry of mucins.

Cystadenoma is a relatively rare benign epithelial tumor of the salivary glands, and described herein is an additional case. A 51-year-old Japanese man had noticed a mass of the left hard palate 25 years previously. Macroscopically, the resected specimen was a multicystic lesion. Histologically, the tumor was composed of bilayered columnar epithelium with cystic change and partial solid growth of glandular structures with clear cells. The tumor cells had mild cellular atypia, but the tumor lacked papillary growth and a fibrous capsule. Immunohistochemistry was positive for cytokeratins, epithelial membrane antigen, MUC1, MUC4 and MUC6, but negative for myoepithelial markers, MUC2, MUC5AC and MUC5B. Such MUC expression patterns suggested that cystadenoma occurs from excretory ducts.

Clinicopathological Features of Buccal Squamous Cell Carcinoma with Focus on Patients Who Never Smoke and Never Drink

Abstract Introduction Oral carcinoma has been reported at a substantial proportion in patients who never smoke and never drink. However, the proportion may vary by subsite and ethnicity. Objective We aimed to determine the clinicopathological features of buccal squamous cell carcinoma (SCC) in a Japanese population. Methods We retrospectively analyzed the records of patients diagnosed with buccal SCC at our institution from September 2002 to November 2015. We reviewed the gender, age, tumor status, treatment, smoking, alcohol drinking, multiple primary cancers, and prognosis of the patients. The overall and cause-specific survival rates were calculated, and the effects of clinicopathological variables were assessed by univariate analysis. Furthermore, the cause of death was evaluated. Results Among the 63 patients (men: 38; women: 25) included in the present study, 29 (46.0%) never smoked or drank. Women were almost 5 years older than men (p = 0.014). The number of women in the group who never smoked or drank was disproportionately higher than that of those in the smoker or drinker groups (p < 0.001). In total, 29 patients (46.0%) had 59 multiple primary cancers, including 26 oral cancers. Surgeries and radiotherapy were performed in 57 (90.5%) and 6 (9.5%) cases, respectively. The 5-year overall survival and disease-specific survival rates were 74.6 and 78.8%, respectively. Conclusion Our study confirms that buccal SCC may develop in older adult Japanese patients, especially in women who have never smoked or drank. These patients could be at risk for second primary malignancy.

Mandible reconstruction using the calcium-sulphate three-dimensional model and rubber stick: a new method, 'mould technique', for more accurate, efficient and simplified fabrication.

BACKGROUND: Osteocutaneous flaps are one of the best options for one-stage mandible reconstruction. However, the challenge remains to achieve optimal functional and cosmetic results. A new novel approach involving the preoperative prefabrication of a reconstructive plate through a calcium-sulphate three-dimensional (3D) model facilitates the contouring of vascularised bone grafts. We herein report our preparations and results using this technique. METHODS: A total of 17 mandibular defects were reconstructed by this novel approach. A calcium-sulphate 3D model was constructed from computed tomography (CT) data. After the oncologist designed the cut line on the model, the mandibular arc was ground to the neo-mandible shape, which consisted of several linear planes according to the osteotomy of the bone graft. The reconstruction plate was shaped to fit this. After tumour resection, the prefabricated plate was placed to the remaining mandible and revealed the defect to be reconstructed, just as a mould. Rubber sticks were used as a template to shape the bone graft. The preoperative information, and functional and aesthetic results were retrospectively analysed. RESULTS: As many as 12 fibular and 5 scapular flaps were applied. Postoperative complications included two salivary fistulae, one abscess and one partial skin loss, all of which were resolved after conservative treatment. Postoperatively, all patients could speak clearly, 12 had a normal diet and 12 had excellent cosmetic results. CONCLUSIONS: This is the first report using models made by calcium-sulphate. The largest advantage of this model is that the neo-mandible shape can be demonstrated preoperatively. The refinement of mandible reconstruction after tumour ablative surgery can be achieved with a prefabricated plate through the use of a calcium-sulphate 3D model. It enables more accurate, faster and simplified fabrication of reconstruction plates, thus leading to satisfactory functional and cosmetic results.