Malignant Parotid Research Articles

Clinical profile of patients with salivary gland tumours

In sublingual glands 85% are malignant and only 15% are benign. The incidence of malignancy in submandibular gland is higher than parotid gland and the prognosis is poorer than parotid malignancies. Risk factors linked to the development of salivary gland neoplasia include: radiation exposure; familial or genetic predisposition; tobacco use: strong association between tobacco use and the development of Warthin's tumor; microorganisms: Epstein Barr virus linked lymphoepithelial carcinoma; exposure to industrial chemicals. Total 20 cases clinically presenting as salivary gland tumours during the study period were taken for study. Each case was examined clinically and properly in a systematic manner. The cases were treated on their individual merits. All patients presented with swelling. Features of rapid growth, pain, and associated facial paralysis were considered as signs of malignancy. One out of 20 patients presented with pain in swelling, that was malignant. Features of fixity, facial paralysis and nodal involvement were considered as signs of malignancy. Hard in consistency suggests malignancy. All patients in this study had only swelling and no other signs.

Evaluation of Preoperative Fine Needle Aspiration Accuracy in Diagnosis of Malignant Parotid Tumors

Objective: To evaluate the diagnostic accuracy of fine needle aspiration (FNA) in detecting malignant parotid tumors. Design: A retrospective study of cases series. Setting: Salmaniya Medical Complex, Otorhinolaryngology Department, Kingdom of Bahrain. Methods: A retrospective study was carried out, between January 2009 and December 2018, for all patients diagnosed with parotid tumors at the Department of Otorhinolaryngology, Head and Neck Surgery at Salmaniya Medical Complex, Manama, Kingdom of Bahrain. Data collection was made from medical records, I-seha and laboratory information system (LIS). 87 patients underwent parotidectomy, of which 30 were excluded due to unsatisfactory diagnoses or missing data. The results of fine needle aspirations were analyzed and compared with the corresponding histopathologic diagnosis. Estimation of sensitivity, specificity, negative predictive value, positive predictive value and accuracy of FNA were calculated. Results: Among the 57 evaluated cases, four cases were further excluded from the final analysis due to unsatisfactory FNA results, therefore only 53 cases remained. The mean age of patients was 48.6 ± 17.2 years. A concordance with histopathology results was observed. 47 cases were diagnosed as benign and five cases were malignant, however, 1 case was diagnosed as malignant by FNA, but not in histopathology. The overall diagnostic accuracy was 98.1% and the prevalence of parotid malignancy was 9.4%. Sensitivity and specificity were 100% and 97.9%, respectively. Positive predictive value was 83.3% while negative predictive value was 100%. Conclusion: Fine needle aspiration is a highly sensitive and specific test in evaluating malignant parotid gland tumors. It is useful and accurate, especially when used hand by hand with the clinical assessment and radiological findings.

Are demographics associated with mucoepidermoid or acinic cell carcinoma parotid malignancies in children?

ObjectiveTo identify possible associations between patient demographics and parotid cancer histological type in pediatric patients.MethodsPediatric patients (ages: birth-18.0 years) in the Surveillance, Epidemiology, and End Results (SEER) database were included from 1973 to 2014 based on a diagnosis of mucoepidermoid carcinoma or acinic cell carcinoma of the parotid gland using the ICD O-3 codes of C07.9 and 8430 or 8550. Patients were classified into the following cohorts: <14 and 14–18 years of age based on the mean age at diagnosis.ResultsThree hundred and three pediatric patients were diagnosed with mucoepidermoid carcinoma or acinic cell carcinoma of the parotid gland within the SEER 18 registries. Female pediatric patients 14–18 years of age were 7.68 times more likely to have an acinic cell carcinoma (adjusted OR: 7.68 [95% CI: 2.01–29.44]). When stratified by histological type, 58.9% of female pediatric patients ≥14 years of age had an acinic cell carcinoma as compared to 37.3% of male pediatric patients ≥14 years of age, 36.5% of female pediatric patients <14 years of age, and 34.0% of male pediatric patients <14 years of age (P = 0.01).ConclusionsBased on this study, pediatric female patients between the ages of 14 and 18 years are the most likely cohort to have acinic cell carcinoma. The results of this study may assist providers during the work up of a pediatric patient with a suspected parotid malignancy.

Outcomes and prognostic factors in parotid gland malignancies: A 10-year single center experience.

ObjectivesTo describe a 10‐year single center experience with parotid gland malignancies and to determine factors affecting outcomes.Study DesignRetrospective review.MethodsThe institutional cancer registry was used to identify patients treated surgically for malignancies of the parotid gland between January 2005 and December 2014. Clinical and pathologic data were collected retrospectively from patient charts and analyzed for their association with overall survival (OS) and disease‐free survival (DFS).ResultsTwo hundred patients were identified. Mean age at surgery was 57.8 years, and mean follow‐up time was 52 months. One hundred two patients underwent total parotidectomy, while 77 underwent superficial parotidectomy, and 21 underwent deep lobe resection. Seventy patients (35%) required facial nerve (FN) sacrifice. Acinic cell carcinoma was the most common histologic type (22%), followed by mucoepidermoid carcinoma (21.5%) and adenoid cystic carcinoma (12.5%). Twenty‐nine patients (14.5%) experienced recurrences, with mean time to recurrence of 23.6 months (range: 1‐82 months). Five‐ and 10‐year OS were 81% and 73%, respectively. Five‐ and 10‐year DFS were 80% and 73%, respectively. In univariate analyses, age > 60, histologic type, positive margins, high grade, T‐stage, node positivity, perineural invasion, and FN involvement were predictors of OS and DFS. In the multivariate analysis, histology, positive margins, node positivity, and FN involvement were independent predictors of OS and DFS.ConclusionsOur single‐center experience of 200 patients suggests that histology, positive margins, node positivity, and FN involvement are independently associated with outcomes in parotid malignancies.Level of Evidence4

Social determinants of health and survivorship in parotid cancer: An analysis of the National Cancer Database

Given the rarity of parotid cancer, there is relatively few data published regarding outcomes. Utilizing the large sample population of the National Cancer Database (NCDB), we aim to examine the relationship between two key social determinants of health, demographics and socioeconomic status (SES), and parotid malignancy survival rates. Our analytic sample consists of patients with a diagnosis of primary malignancy of the parotid gland between 2004 and 2012 in the NCDB. We used univariable and multivariable Cox proportional hazard models to evaluate the relationship between overall survival rate and two key social determinants of health: demographics and SES. 15,815 cases met inclusion criteria. Average age was 60.1 years and 8255 were male (52.2%). Median overall survival was 121 months with 5-year overall survival of 67.4%. Male sex and older age at diagnosis were associated with poorer overall survival (p < 0.0001). We found that Asian Americans compared to whites had better overall survival (HR 0.75; 95% CI [0.58-0.95]). Black patients had improved survival compared to whites on univariate (HR 0.71; 95% CI [0.64-0.79]); but not multivariate analysis. Hispanic ethnicity and higher education level were protective (HR 0.76 95% CI [0.63-0.91] and HR 0.84 95% CI [0.74-0.96], respectively). We found no significant survival association based on income level. In this national sample of patients with parotid malignancy, a rare form of cancer, we found a significant correlation between important social determinants of health and overall survival rate. Females, Asian-Americans, Hispanics, and patients with higher education level have better overall survival.

Surgical complications and its management after parotidectomy: Our 4 years experience

Background: The majority of parotid tumours are benign. Nealy 80 % of parotid tumour involve the superficial lobe. Parotidectomy was first introduced into the world literature by Berard in 1823 who removed first parotid tumor. Parotidectomy has well-documented post-operative complications.Aims & Objectives: The aim is to study the postoperative complications and its management after parotidectomy.Methods: This prospective study was conducted on 60 patients who underwent parotidectomy by antegrade technique from July 2014-july 2019 for parotid tumours. Patients were submitted to careful history taking, complete clinical examination, and examination of facial nerve integrity before surgery.48 patients underwent superficial parotidectomy (44 patients for pleomorphic adenoma,4 patients for warthin’s tumour) and 12 patients underwent Total conservative parotidectomy (9 patients for parotid malignancy and 2 patients for pleomorphic adenoma recurrence and 1 patients for pleomorphic adenoma involving deep lobe of parotid).Results: In our study, out of 48 patients underwent superficial parotidectomy 18 patient developed complications and 12 patients underwent Total conservative parotidectomy 10 patients developed complication. Several complications have been reported in parotid surgery. Temporary facial nerve paresis was the most common postoperative complication followed by hypoesthesia of greater auricular nerve. Most patient regained normal facial nerve function within 2 months after surgery.Conclusion: Parotid tumours are the most common salivary gland tumours. Majority of parotid tumours are benign and involve the superficial lobe. Parotidectomy is the defenite procedure for parotid tumours. Parotidectomy is challenging procedure because of the intraparenchymal course of the facial nerve and has its own complications. Surgical complications are higher in total conservative parotidectomy than in superficial parotidectomy. Complications are reduced by proper dissection technique and treated carefully if complication arises.

The role of elective neck dissection in high-grade parotid malignancy: A hospital-based cohort study.

The role of elective neck dissection (END) in patients with clinically N0 (cN0), high-grade parotid carcinoma is unclear. The objective of this study was to assess the association between END and survival in patients with cN0, high-grade parotid carcinoma. Retrospective, multicenter cohort study. A review of hospital-based cases from the National Cancer Data Base was performed. Participants included patients diagnosed with cN0, high-grade parotid cancer between January 1, 2004 and December 31, 2013. The primary exposure was receipt of neck dissection. Secondary exposures included receipt of adjuvant radiation and/or chemotherapy. Univariate and multivariate survival analyses were performed. Unadjusted and adjusted survival estimates were determined. Overall, 1,547 patients were included, with a median follow-up time of 48 months. END did not have a statistically significant effect on 3-year survival (3-year: 69.9%, 95% confidence interval [CI]: 67.2 to 72.6). Survival at 3-years among those not receiving END was 66.1% (95% CI: 62.7 to 69.5). Parotidectomy and adjuvant radiotherapy had the strongest effect on mortality. There was no difference in 3-year survival among patients who underwent parotidectomy and adjuvant radiation stratified by receipt of END nor did END have a statistically significant effect on survival in mucoepidermoid carcinoma, adenocarcinoma, high-risk histology, high T stage, or academic center treatment subgroups. END did not have a statistically significant effect on survival among cN0 patients with high-grade parotid cancer when taking into account receipt of adjuvant therapy and confounding. The role of END on survival and locoregional control remains to be further elucidated in prospective studies. 4 Laryngoscope, 130:1487-1495, 2020.

Multi-parametric MR imaging using pseudo-continuous arterial-spin labeling and diffusion-weighted MR imaging in differentiating subtypes of parotid tumors

PurposeTo evaluate multi-parametric MR imaging using pseudo-continuous arterial-spin labeling (pCASL) and diffusion-weighted imaging (DWI) in differentiating subtypes of parotid tumors. Material and methodsThis study was done on 61 consecutive patients (27 M, 34 F aged 15–75 ys: mean 42 ys) with parotid tumors that underwent pCASL and DWI with the calculation of tumor blood flow (TBF) and apparent diffusion coefficient (ADC). ResultsThe mean TBF and ADC of parotid malignancy (n = 20) (53.1 ± 6.9 mL/100 g/min and 0.66 ± 0.1 × 10−3 mm2/s) was a significant different (P = 0.001) than benign tumors (n = 41) (22.7 ± 2.7 mL/100 g/min and 1.28 ± 0.4 × 10−3 mm2/s) respectively. Multi-parametric TBF and ADC were used to differentiate malignant from benign tumors has an AUC (AUC) of 0.97, and the accuracy of 90%. There was a significant difference (P = 0.001) TBF between Warthin tumors (WT) (26.7 ± 9.7 mL/100 g/min) and malignancy. Selection of TBF of 30.5 mL/100 g/min to differentiate malignancy from WT revealed an AUC of 0.95 and the accuracy of 87%. There was a significant difference in TBF and ADC of pleomorphic adenomas (PA) from malignancy (P = 0.001). Multi-parametric TBF and ADC were used to differentiate PA from parotid malignancy revealed an AUC of 1.00. There was a significant difference in TBF and ADC of PA and WT (P = 0.001). Multi-parametric MRI using TBF and ADC used to differentiate PA from WT have an AUC of 0.99, and the accuracy of 92%. ConclusionMulti-parametric MR imaging using pCASL and DWI is useful for differentiating benign parotid tumors from parotid malignancy and PA from WT and TBF helps in discrimination of WT from parotid malignancy.

Preoperative biopsy in parotid malignancies: Variation in use and impact on surgical margins.

Determine rate of preoperative biopsy in parotid malignancies, identify factors associated with its use, and its association with surgical margins. Retrospective cohort. Commission on Cancer-Accredited Institutions. We included 5533 patients treated surgically for a parotid malignancy 2004-2014 in the National Cancer Database. Chi-squared tests, univariable, and multivariable logistic regressions were used to evaluate predictors of preoperative biopsy (defined as needle, aspiration, or incisional), and associate biopsy with surgical margins. Preoperative biopsy was utilized in 26.0% of patients. Biopsy was more likely in patients >60 years (odds ratio [OR]: 1.19, P = .035), advanced clinical T stage (vs. T1,T2 OR: 1.23, P = .009; T3 OR: 1.26, P = .026; T4A OR: 2.05, P < .001), advanced clinical N stage (vs. N0, N1: OR: 1.39, P = .013; N2/3: OR: 1.63, P < .001), in academic centers (OR: 1.18, P < .024), and in higher volume centers (vs. low, medium OR: 1.28, P = .002; high OR: 2.16, P < .001). Biopsy use increased over time (vs. 2004-2006, 2007-2010 OR: 1.20, P = .047; 2011-2014 OR: 1.39, P < .001). Biopsy was associated with a reduced risk of positive margins in patients with clinical T1 stage (OR: 0.70, P = .012), and younger than 61 (OR: 0.79, P = .036). The national rate of preoperative biopsy in parotid malignancy is low at 26.0%, but has increased over time. Preoperative biopsy is associated with a reduced risk of positive margins in younger patients and those with early clinical stage, suggesting its increased use may improve surgical outcomes and decrease reoperation or adjuvant therapy in these subgroups of patients. 3 Laryngoscope, 130:1450-1458, 2020.

The author’s reply regarding “Clinical Behaviours and Prognoses of High and Low Risk Parotid Malignancies Based on Histology”

The author’s reply regarding “Clinical Behaviours and Prognoses of High and Low Risk Parotid Malignancies Based on Histology”

Completion surgery after extracapsular dissection of low-grade parotid gland malignant tumors.

The aim of the study was to compare the oncological and functional outcome between extracapsular dissection and completion surgery on the one hand and sole extracapsular dissection on the other hand in small low-grade malignant parotid tumors. The records of all patients treated for T1-T2 low-grade malignant tumors of the parotid gland primarily by means of extracapsular dissection between 2006 and 2015 were studied retrospectively. Forty patients with T1-T2 low-grade parotid malignancies were detected. Our study showed outstanding oncological outcomes in both patient groups, the facial nerve function being significantly better after sole extracapsular dissection in the direct postoperative phase, with no differences between the groups in the long term. Our study showed very encouraging preliminary results following primary extracapsular dissection as the sole surgical therapy for carefully selected low-stage, low-grade, inferiorly located lesions in patients with high compliance.

Impact of payer status on survival in parotid malignancy.

In the setting of current national healthcare reform, it becomes especially relevant to understand the current state of healthcare disparities with regards to insurance status. To determine the impact of payer status on survival in parotid malignancy, we utilized the National Cancer Database (NCDB). Retrospective database review. National Cancer Database (2004-2012). The NCDB was queried for cases of primary malignancy of the parotid gland between 2004 and 2012. The impact of payer status on overall survival was evaluated, as well as the relationship of insurance status with patient and tumor variables. 15,815 cases met inclusion criteria. A majority had private insurance (47.8%), followed by Medicare (40.9%), Medicaid (5.0%), uninsured (3.2%) and other government sources (1.3%). Medicare patients had the lowest 5 and 10-year survival rates (50.7% (95% CI [49.3-52.1]) and 27.8% (95% CI [25.0-30.9]), respectively). On multivariable analysis, uninsured, Medicare, and Medicaid patients had worse overall survival than the privately insured (HR 1.42, 95% CI [1.17-1.74]; HR 1.29, 95% CI [1.17-1.42]; HR 1.36, 95% CI [1.13-1.62], respectively). Uninsured and Medicaid patients were more likely than the privately insured to present with advanced stage disease, nodal metastasis and longer times to treatment following diagnosis. In parotid malignancy, uninsured, Medicaid, and Medicare patients have worse survival outcomes compared to those with private insurance. Uninsured and Medicaid patients also present with more advanced stage disease and have increased wait times before definitive treatment is initiated.

Clinical Significance and Indication for Surgical Treatment of Occult Cervical and Intraglandular Nodal Involvement in Parotid Malignancy

Surgical management, including the extent of surgery, for patients with parotid malignant tumors has been challenging. The aims of the present study were to identify the factors associated with survival, estimate the incidence of occult nodal and intraglandular metastases, and determine the predictive influence on overall and disease-free survival, with consideration of the surgical extent. We implemented a retrospective cohort study and identified incident cases with parotid malignant tumors from 2003 to 2016 at a single quaternary medical care and cancer center. A medical record analysis was performed retrospectively of the patient and histopathologic data. The predictor variables were age; tumor grade; T stage; N stage; facial nerve palsy; perineural, vascular, andlymphovascular invasion; completion parotidectomy; elective neck dissection; and pN0 versus pN+. Overall and disease-free survival were evaluated as primary and secondary outcome variables. Data analysis was performed as a time-to-event analysis (Kaplan-Meier method). A total of 102 patients with parotid carcinoma had undergone surgery from 2003 to 2016 at the University Hospital Freiburg, Germany; 69 patients had undergone completion parotidectomy (total, 36; radical, 33). A total of 13 patients had occult intraparotideal lymph node metastases after elective completion parotidectomy. All the patients who had undergone elective neck dissection and clinically had had no nodal involvement (cN0) had had no pathologic lymph node metastases found (pN0). However, the predictive factors for cervical nodal involvement were high-grade tumors, locally advanced tumors (cT3-cT4), and the presence of intraparotideal nodal metastases. The rate of occult cervical metastases in the present study was surprisingly low (0%). However, owing to the various predictive factors, elective neck dissection should be performed for high-grade or locally advanced (stage T3-T4) parotid malignoma. Moreover, we highly recommend performing completion parotidectomy for all high-grade tumors and also for locally advanced (stage T3-T4) low-grade tumors, owing to the >12% of occult intraparotideal metastases found in the present study.

Oncological outcomes of parotid gland malignancies: a retrospective analysis of 74 patients

IntroductionSalivary gland malignancies are rare neoplasms whose management has been evolving over the last two decades. Nevertheless, patient outcomes have not improved accordingly. ObjectiveIn the present paper, factors and variables that could influence Overall, Disease-Specific and Disease-Free Survival, and Loco-Regional Control were analyzed. MethodsChart data from 74 patients who underwent parotid gland surgery were retrospectively analyzed and stratified for tumor histology, grading, size, pT stage, pN stage, extracapsular spread, involved salivary gland lobe, and age at diagnosis. Major outcomes were estimated at 5 years by Kaplan–Meier curves. ResultsAdvanced stage, high grade, and lymph nodes involvement greatly impaired patient outcomes. Furthermore, in our cohort, the age at diagnosis ≥ 55 was a cause of poorer disease survival likely due to a different distribution in tumor histotypes between older and younger patients. Despite the two groups were homogeneous for the numerosity of squamous cell carcinomas, older patients were more rarely affected by mucoepidermoid and acinic cell carcinomas, which have generally better prognosis. Finally, patients aged ≥ 55 had a more frequent pathological involvement of the deep lobe of the parotid gland if compared to the younger counterpart. ConclusionThe rarity of some salivary gland tumor histotypes requires further high-number series to fully understand the prognostic factors for both patient survival and recurrence development. In our cohort, the age at diagnosis ≥ 55 raises concerns that play crucial roles in disease survival shortening.

Auriculotemporal Nerve Involvement in Parotid Bed Malignancy.

To identify and evaluate patients with parotid bed malignancy demonstrating radiographic findings of auriculotemporal (AT) nerve involvement. A retrospective review of patients with parotid bed malignancy was performed to identify patients with imaging findings of AT nerve involvement and record associated clinical findings, symptoms, and pathology information. Independent, blinded review of radiographic images by a senior neuroradiologist was performed to identify imaging characteristics and categorize patients into highly likely or possible involvement groups. Of 547 patients identified with parotid bed malignancy, 23 patients exhibited radiographic findings suggestive of AT nerve involvement. Thirteen patients met criteria for highly likely involvement, and 10 patients met criteria for possible involvement. Cutaneous malignancy with metastasis to the parotid bed accounted for 11 of 23 patients, and the most common histology was squamous cell carcinoma (9 patients). Primary parotid malignancy accounted for 12 of 23 patients, and the most common histology was salivary ductal carcinoma (3 patients). All 13 highly likely patients reported periauricular pain, and 11 of 13 demonstrated facial weakness. Features suggesting advanced disease included radiographic findings of intracranial involvement (10/23 patients), nonsurgical primary treatment (13/23 patients), and positive margins on pathology report (7/10 patients). AT nerve involvement is an uncommon but important phenomenon that often occurs in the setting of advanced disease and is commonly associated with periauricular pain and coexisting facial weakness. Awareness of the associated clinical features and imaging patterns can allow for appropriate identification of this pattern of spread and help to optimize treatment planning.

Submental Flap for Soft Tissue Reconstruction following Radical Parotidectomy.

This study analyzed our institution's experience with a buried submental flap for soft tissue reconstruction following radical parotidectomy. A retrospective chart review was conducted of patients who had parotid malignancies requiring radical parotidectomy, who also underwent a buried submental flap reconstruction. Analysis included patient demographics and clinical, surgical, and outcome data. Three patients met criteria for this study who underwent a buried submental flap at a tertiary medical center between 2012 and 2016. All patients had oncologic surgery and reconstruction using a deepithelialized submental island flap, which was used to fill the radical parotidectomy surgical defect with no complications and good aesthetic results. Each patient received appropriate adjuvant therapy. This case series shows that the buried submental island flap is a versatile flap that is adequate bulk after radical parotidectomy. It also has no impact on hospital length of stay and provides excellent cosmetic outcomes with minimal donor site morbidity.

Radiotherapy for parotid malignancies: patterns of care and impact on overall survival

Parotid tumors are rare, and no clinical trial data exists to guide postoperative radiation therapy (PORT) usage. We sought to determine the impact of PORT on the overall survival (OS) of patients with parotid malignancies. Patient data was queried from the National Cancer Database. Patients with surgical resection of parotid gland carcinomas from 2004 to 2012 were analyzed. Kaplan-Meier and Cox proportional hazards were used to assess OS among those receiving PORT or not. Additionally, variables affecting OS and use of PORT were evaluated. A total of 12,439 patients were identified for analysis. Increasing T stage, N stage, tumor grade, and positive margin status were predictive of PORT. Survival for patients receiving PORT versus surgery only at 5 and 10 years was 65.5% and 50.3% versus 74.4% and 61.2% for surgery only (p ≤ 0.001). After multivariable adjustment, PORT improved OS (adjusted hazard ratio 0.79, 95% confidence interval 0.70–0.89). In subgroup analysis, PORT provided benefit for certain histologic subtypes and all other patient groups except those with T1 tumors and undifferentiated/anaplastic tumor grades. Our data suggests that PORT was associated with improved survival. Additionally, some subgroups may receive additional benefit and patients with small (T1), low-grade disease may be able to forgo PORT.

Reuse of the Masseteric Nerve for Dynamic Reanimation in Facial Palsy Patients with Previously Failed One-Stage Dynamic Smile Reanimation.

Failed primary dynamic smile reanimation procedures present significant challenges for the patient and surgeon alike. This is particularly true in older patients with a history of previous neck dissection and radiation therapy who underwent previous reconstruction with a free functional muscle transfer innervated with an ipsilateral masseter nerve. The objective of this study was to demonstrate feasibility, describe surgical technique, and assess results of reusing the masseter nerve to reinnervate a new free functional muscle transfer. Patients presenting between 2007 and 2017 to a single center after previously failed dynamic smile reanimation using the masseteric nerve who underwent a salvage dynamic procedure involving reuse of the masseteric nerve were analyzed for demographics, history of radiation therapy or chemotherapy, surgical techniques, and objective measurements using the MEEI Facegram software. The average age was 50 years, the average duration of palsy was 6.2 years, and the average preoperative House-Brackmann score was 6. Causes of palsy included Bell palsy in one, parotid malignancies in two, and a seventh cranial nerve schwannoma in one patient, with two patients requiring radiation therapy preoperatively. Three patients failed to achieve any motion after the first reanimation, and the fourth patient initially achieved excursion; however, because of cancer recurrence and resection of free functional muscle transfer, motion was subsequently lost. Average smile excursion after salvage was 11.32 mm and philtral deviation correction was 1.3 mm. Reusing the masseter nerve for dynamic smile restoration with free functional muscle transfer in previously failed reanimation patients is feasible and may provide successful reanimation. Careful patient evaluation and clear understanding of previous procedures are essential for success. CLINICAL QUESTION/LEVEL OF EVIDENCE:: Therapeutic, IV.

Management of the neck in malignant parotid neoplasm

&lt;p class="abstract"&gt;Parotid gland cancer (PGC) are rare and accounts for 3% of all head and neck malignancies.The classification of parotid tumour is complex and comprises both benign and malignant neoplasms of epithelial and non-epithelial origin.There is marked variation in the histological features of these tumours,therefore treatment options of parotid cancer is widely varied.Lymph node metastasis to the neck is one of the most important factors in therapy and prognosis for patients with parotid malignancy. This article reviews the literature regarding neck management of parotid cancer in cases of both clinically positive (cN+) and clinically negative (cN-) neck nodes. The literature search was performed using Google search engine, PUB Med to identify relevant articles on recommendations for neck management in patients with parotid cancer in cases of both clinically positive (cN+) and negative (cN-) neck nodes. Due to the rarity of parotid cancer and the wide histopathological varieties, the literature was hard to interpret. There is a consensus about managing clinically positive neck with therapeutic neck dissection. Most studies agree on elective neck dissection in certain indications which are high T stage, high grade histology, facial paralysis, age, extraglandular extension, peri-lymphatic invasion. Level II to IV appears to be at higher risk and can be done through the same parotidectomy incision. The role of irradiation in cN- necks is not clear but some studies recommend its usage for curative intent and argue that it adds less morbidity than the elective neck dissection. Although the management of the neck in cN+ patients is widely agreed, controversy still exists about the need for elective neck dissection in cN- patients and the levels which should be dissected.&lt;/p&gt;

Clinical behaviours and prognoses of high- and low-risk parotid malignancies based on histology.

To report 5-year survival in patients with primary parotid malignant tumours and assess the impact of various factors on survival or local control among diverse histologic groups. A total of 65 patients with primary parotid malignant tumours who had surgery between 2003 and 2014 were identified. Demographic characteristics including age, T stage, N stage and clinical or pathological performance were analysed. According to risk stratification (based on pathology), 65 primary parotid malignant tumours were divided into high-risk (23, 35.38%) and low-risk (35, 53.85%) groups. Overall survival (OS) and disease-free survival (DFS) were recorded by the Kaplan-Meier methods. The 5-year overall survival rate for primary parotid malignant tumours was 70.9%. Patients older than 60years with fixed mass, pain, facial-nerve palsy and high-grade N stage had adverse OS and DFS. Upon multivariable analysis, facial-nerve palsy (HR 24.59; 95% CI 2.338-178.446; P = 0.002) was the only independent predictive factor for OS. Patients with high-risk parotid malignant types were more likely to have tumour pain, facial-nerve palsy (Chi-square test: < 0.0001 and 0.02), lymphatic metastasis and local/regional recurrence (Chi-square test: 0.008 and 0.012). Compared with low-risk parotid carcinoma, tumours with high-risk histological features tend to need aggressive surgical extirpation, neck dissection and postoperative radiotherapy.