Recurrence and Prognosticators of Recurrence in Odontogenic Keratocyst of the Jaws.

Introduction: The incidence of recurrence of OKC varied from 2.5 to 62%. Studies have linked recurrence to treatment methods and also clinical and pathological features. The aim of this study was to evaluate the 5-year recurrence and the factors associated with recurrence in odontogenic keratocysts of the jaws. Methods: A retrospective review of records was done from the Institute's Medical Records Directory from 2010 to 2021. The following data were obtained of the lesion; age at presentation, gender, site, subsite, radiographic presentation (locularity), radiographic borders, presence or absence of satellite cysts, inflammatory infiltrate, and treatment rendered presence or absence of cortical perforation and soft-tissue extension and presence or absence of recurrence. Kaplan Meir estimator was used to evaluate recurrence rate and log rank test was used to compare the survival amongst groups. Cox regression analysis was used to evaluate the odds ratio to find out the possible factors influencing risk of recurrence. A p value of < 0.05 was considered statistically significant at 95% confidence interval. Results: In our study cohort, 27.2% of patients had recurrence. Posterior maxillary lesions, multilocular lesions, lesions with scalloped borders, presence of soft-tissue extension and cortical perforation, presence of satellite cysts and inflammatory infiltrate and enucleation with peripheral ostectomy were significantly associated with recurrence. However, soft-tissue extension, cortical perforation, multilocular lesions and presence of satellite cysts were independent risk factors. Conclusion: There is still debate on the best treatment modality for the management of OKCs. More studies are required to quantify the results.

Management of trigeminal neuralgia by peripheral neurectomy.

Background: Peripheral neurectomy(PN)is a minimally invasive procedure, for the management of trigeminal neuralgi (TN)consisting of surgical avulsion of terminal branches of the trigeminal nerve. Aim: To assess the efficacy of PN in the treatment of refractory TN and their recurrences in a follow up of 18 months. Materials and Methodology: Retro-prospective and prospective study was conducted on randomly selected 30 TN patients irrespective of age, gender and socio-economic status. The branch of trigeminal nerve involved was identified according to the site of pain. Then the PN procedure was performed under local or general aesthesia. The follow up of each patient was done for next 18 months. Results: Mean age of the TN patients 53.17 ± 13.84 years, with 66.7% of patients were within 60 years of age. Male to female ratio was 1:1.5. All patients showed unilateral TN. Mostly 26.7% trigger point was located in lower lip followed by 13.3% in upper lip. After 3,6 and 9 months follow-up, none of the TN patients treated with PN had pain and none had any effect on general activity. However, from 12 months till 18 months' follow up, 2 (6.7%) patients reported of pain. Conclusion: PNs are viable treatment alternative for TN, although peripheral neurectomy has chances of reoccurrence but still offer better quality of life in patients for many years without relaps.

Locally Advanced oral Squamous cell Carcinomas: Auditing and Outcome Appraisal.

Introduction: Patients with OSCC in India (oral squamous cell carcinoma) presents at a later stage with approximately 28% presenting at stage III and 64% at stage IV disease. In this retrospective study we have reviewed the treatment modalities rendered and outcomes associated for the management of locally advanced oral squamous cell carcinoma in our Institute. We evaluated the survival data and the factors effecting survival. Methods: Kaplan Meir method was used to evaluate OS and DFS rate and log rank test was used to compare the survival amongst groups. Cox regression analysis (univariate and multivariate) was used to evaluate the hazard ratio to find out the possible factors influencing risk of death and disease. Results: The median OS and DFS in our study were 32 and 24 months respectively. On a subset analysis of only T4b patients who underwent either upfront surgery or induction chemotherapy followed by surgery there was no significant difference in OS and DFS. All patients with TURD had partial response after induction chemotherapy and were subjected to surgical resection followed by adjuvant therapy. Conclusion: Extracapsular spread, bone involvement, skin infiltration, treatments, surgical margins and Lymph node size are the prime predictors of survival.Upfront surgery remains the standard of care for resectable LAOSCC. Induction chemotherapy might improve the resectability in technically unresectable OSCC. There is no difference in survival between concurrent chemoradiation, sequential chemoradiation and radical radiotherapy in the management of unresectable disease. Supplementary Information: The online version contains supplementary material available at 10.1007/s12070-023-04168-4.

C-Arm a Useful Tool for Surgeons in Reduction of Zygomatic Complex Fracture: A Comparative Study: Article Type-Original Research.

Introduction: Reduction of zygomaticomaxillary (ZMC) fracture is often difficult to evaluate intraoperatively because of it peculiar anatomy and limited accessibility. The purpose of this study is to evaluate the efficacy of use of C-arm as a tool for intraoperative monitoring of ZMC fracture reduction. Materials and Methods: Group I (C-Arm) and Group II (control group) comprised of patients with isolated unilateral displaced Zygomatic complex (ZMC) fractures and having orbital volume change. The efficacy of use of C-arm intra-operatively was evaluated to analyse the reduction of fracture. Results: It was observed that mean change in ocular volume was around 1.07cm2 for Group I and 1.51cm2 in Group II. Thus post-operative eye volume was near to normal in Group I than Group II. The change in ocular volume post-operatively was observed to be statistically significant (p-value < 0.05) in both the groups. Post HOC Tukey statistical analysis determined the intergroup relation in change in eye volume between normal, pre- and post-operative and was found to be statistically significant (p-value < 0.05). The intergroup comparison between Group I and Group II was done using ANOVA statistical analysis and was found to be statistically significant (p-value < 0.05). Discussion: Our study revealed that C-arm is definitively an effective tool in the oral and maxillofacial surgery armamentarium, giving better results with minimal surgical exposure and by eliminating operator related error. Supplementary Information: The online version contains supplementary material available at 10.1007/s12070-022-03221-y.

Management and outcome of locally advanced oral squamous cell carcinoma.

Management of locally advanced OSCC is multimodal. No single therapy has been proved to be efficacious. However there is a trend towards surgical intervention in operable disease. In this review we appraise the various therapies used for the management of locally advanced OSCC. We review the literature with regards to the various treatment options for locally advanced OSCC. We categorically divided the manuscript into resectable, unresectable and technically unresectable disease. Surgery is the ideal treatment modality for resectable disease. For unresectable disease concurrent chemoradiation appears to improve survival compared to radiotherapy alone. Induction therapy might downstage tumors in the unresectable category. Targeted and Immunotherapy is reserved for recurrent, metastatic or platinum refractory OSCC. Management of locally advanced OSCC is multimodal with surgery playing the primary role. In the event where the tumor is in operable concurrent chemoradiotherapy is regarded as the best treatment modality. Induction chemotherapy currently cannot be recommended for resectable or even unresectable oral squamous cell carcinomas. However for technically unresectable disease it might play a role in improving respectability but it depends on the response of the tumor. Targeted therapy and immunotherapy is currently used for recurrent, metastatic and/or platinum refractory Head and Neck cancers. Currently it is not recommended for initial management of locally advanced disease.

Predictors of Extracapsular Spread in T1/T2 Oral Squamous Cell Carcinoma: A retrospective study.

Introduction: In the N0 neck the incidence of ECS might range from 13 to 60%. In this retrospective study we intended at evaluating the primary tumor and nodal characteristics that might influence the presence of ECS in early stage OSCC. Methods: The predictor variables were tumor and nodal features and the incidence of ENE was the outcome. Univariate and multivariate regression models along with ROC curve and Youden's J statistics was used for analysis. A p value < 0.05 was considered statistically significant. Results: The cut off value for DOI was 6.5 mm and LN size was 12.5 mm with overall accuracy of 80.15% and 84.93% respectively. Primary tumor features and LN size was significantly associated with ENE. Discussion: Oral tongue tumors and PNI are independent risk factors for ENE. An elective neck dissection remains the standard of care from both diagnostic and therapeutic viewpoints.

Sandwich osteotomy with interpositional grafts for vertical augmentation of the mandible: A meta-analysis.

Sandwich osteotomy is a technique for vertical augmentation based on the principle of a graft being placed between two pedicled native bones. The inherent vascularization helps in graft consolidation. The aim is to review the bone height gained, implant survival and pitfalls with sandwich osteotomy. The PICO model was used to identify the suitable studies for the review. Oxford level of evidence, Newcastle Ottawa Scale and Cochrane's tool for Systematic Reviews of Interventions was applied for identifying study quality. Meta-analysis was performed with the help of RevMan. Funnel plot was used to evaluate publication bias and bias during article selection. Difference in means was used as principal summary measure. Fixed effects model with inverse variance statistics was used. I2test statistics was applied to identify study heterogeneity. Forest plots were produced for the outcome variables with 95% confidence interval (CI) and overall treatment effects and subgroup effects at a significance level of 0.05. The overall implant survival rate ranged from 90%-100% and prosthetic survival rate from 87%-95%. An overall 6-10mm of bone can be gained in the anterior mandible and 4-8mm in the posterior mandible. A total of 1030 implants were placed of which 988 implants survived after the mean follow up periods (odds ratio: 0.77, 95% CI: 0.49-1.21). Implant survival is independent of the graft being used. Vertical augmentation in the posterior mandible is limited compared to anterior owing to the presence of inferior alveolar nerve and the keratinized tissue deficiency.

Is the facial nerve at risk following surgical correction of mandibular condylar fracture: A systematic review and meta-analysis.

To review the literature on the effect of different surgical approaches on facial nerve injuries. The present systematic review addresses the following focus question: Is the facial nerve at risk following surgical correction of mandibular condylar fracture? Electronic and manual literature searches were conducted on databases:PubMed, ScienceDirect and Google scholar,Cochrane and clinicaltrials.gov for studies published until July 2020 to collect information about the effect of different surgical approaches on facial nerve injuries. Systematic literature review was performed following the prisma guidelines to identify studies. Quantitative retrospective and prospective studies,controlled trials,controlled clinical trials were included;case reports and review articles were excluded from this systematic review. 1500 articles published till July 2020 was identified. 116 articles met inclusion criteria. After applying exclusion criteria seven articles were shortlisted. The level of heterogeneity was observed to be less than 50%, between all parameters for all studies making publication bias to be minimum. On comparing various studies statistically using Z-test for all parameters,it was observed that level of significance was significant for various findings like Displacement/Dislocation of fracture and transient facial nerve weakness was found to be statistically significant between all studies (p-value <0.05). Odd ratio, relative ratio and 95% CI was derived for all parameters recorded for various studies. Due to less number of subjective studies, and variability in study designs and lack of reporting on confounding factors,definitive conclusions on effect of various surgical approaches on facial nerve injury cannot be drawn Future well-designed long-term randomized controlled trials are necessary to reveal the necessary correlation between both the parameters.

Role of sclerotherapy in management of vascular malformation in the maxillofacial region: Our experience.

The management of vascular anomalies is an extremely challenging area and is as divergent as the nature of lesions. Traditionally, embolization with the resection of the lesion has been used. The purpose of this report is to present cases treated successfully using sclerosing solution injections alone. Management of the vascular malformation using intralesional injections of sodium tetradecyl sulfate to the lesion is discussed. The procedure was performed two times at 2 weeks interval. Complete resolution of the lesion was found following sclerotherapy. Conservative interventional management using intralesional injection of sclerosing solution was successful in treating vascular anomaly.

Orofacial cysticercosis: Report of a rare case with review of literature.

Cysticercosis is common in developing countries in which the combination of rural society, crowding, and poor sanitation facilities allows greater contact between humans and pigs and thus more opportunities for fecal contamination of food and water occurs. They are rarely located in oral and perioral tissues, particularly in the muscles of mastication, muscle of the facial expression, suprahyoid muscles, and postcervical musculature and also as in the tongue, buccal mucosa, and lip. Cysticercosis is a potentially fatal parasitic disease that rarely found in the maxillofacial region in humans. This paper reports the case of a young female patient presented with isolated lesion of cysticercosis involving buccinator muscle. In conclusion, we suggest that cysticercosis should be considered in the differential diagnosis of intraoral solitary nodules within the oral and maxillofacial region, especially in endemic areas. High-resolution ultrasonography is an excellent noninvasive and cost-effective modality for the diagnosis and also suggests that localized parasitic infections such as Cysticercus cellulosae can be successfully treated with conservative management using oral antiparasitic (antihelminthic) medication.

Pretreatment serum VEGF is associated with clinical response and overall survival in advanced melanoma patients treated with ipilimumab.

Ipilimumab, an antibody that blocks CTL antigen 4 (CTLA-4), improves overall survival (OS) for patients with metastatic melanoma. Given its role in angiogenesis and immune evasion, serum VEGF levels were evaluated for association with clinical benefit in ipilimumab-treated patients. Sera were collected from 176 patients treated at 3 (n = 98) or 10 mg/kg (n = 68). The VEGF levels before treatment and at induction completion (week 12) were analyzed using the Meso Scale Discovery kit. The association of the levels of VEGF with clinical responses and OS were assessed using the Fisher exact and Kaplan-Meier log-rank tests. VEGF as a continuous variable was associated with OS (P = 0.002). Using 43 pg/mL as the cutoff pretreatment VEGF value defined by maximally selected log-rank statistics, pretreatment VEGF values correlated with clinical benefit at week 24 (P = 0.019; 159 patients evaluable). Pretreatment VEGF ≥ 43 pg/mL was associated with decreased OS (median OS 6.6 vs. 12.9 months, P = 0.006; 7.4 vs. 14.3 months, P = 0.037 for 3 mg/kg; and 6.2 vs. 10.9 months, P = 0.048 for 10 mg/kg). There was no correlation between VEGF changes and clinical outcome. Serum VEGF may be a predictive biomarker for ipilimumab treatment and is worthy of prospective investigation with various forms of immunologic checkpoint blockade.

Immunologic responses to xenogeneic tyrosinase DNA vaccine administered by electroporation in patients with malignant melanoma.

BACKGROUND: Prior studies show that intramuscular injection and particle-mediated epidermal delivery of xenogeneic melanosomal antigens (tyrosinase or Tyr, gp100) induce CD8(+) T cell responses to the syngeneic protein. To further define the optimal vaccination strategy, we conducted a phase I study of in vivo electroporation (EP) of a murine Tyr DNA vaccine (pINGmuTyr) in malignant melanoma patients. METHODS: Human leukocyte antigen (HLA)-A1, A2, A24 or B35 stage IIb-IV melanoma patients received up to five doses of the mouse tyrosinase DNA vaccine by EP every three weeks at dose levels of 0.2 mg, 0.5 mg, or 1.5 mg per injection. Peripheral blood mononuclear cells (PBMC) were collected, cultured with a peptide pool containing eight HLA class I-restricted Tyr-specific T-cell epitopes, and analyzed by HLA-A*0101-restricted tetramers and intracellular cytokine staining (ICS). RESULTS: Twenty-four patients received ≥1 dose of the pINGmuTyr vaccine; PBMCs from 21 patients who completed all five doses were available for Tyr immune assays. The only common toxicity was grade 1 injection site reaction. Six of 15 patients (40%) in the 1.5 mg dose cohort developed Tyr-reactive CD8(+) T cell responses following stimulation, defined as a ≥3 standard deviation increase in baseline reactivity by tetramer or ICS assays. No Tyr-reactive CD8(+) T cell response was detected in the 0.2 mg and 0.5 mg dose cohort patients. Epitope spreading of CD8(+) T cell response to NY-ESO-1 was observed in one patient with vitiligo. One patient subsequently received ipilimumab and developed an enhanced Tyr-reactive response with polyfunctional cytokine profile. After a median follow-up of 40.9 months, median survival has not been reached. CONCLUSIONS: A regimen of five immunizations with pINGmuTyr administered by EP was found to be safe and resulted in Tyr-reactive immune responses in six of 15 patients at 1.5 mg dose cohort. TRIAL REGISTRATION: ClinicalTrials.gov NCT00471133.

Immunologic response to xenogeneic gp100 DNA in melanoma patients: comparison of particle-mediated epidermal delivery with intramuscular injection.

PURPOSE: Prior studies show that i.m. injection of xenogeneic orthologues of melanosomal antigens (tyrosinase, gp100) induces CD8(+) T-cell responses to the syngeneic protein. To further define the optimal vaccination strategy, we conducted a pilot clinical trial comparing i.m. injection with particle-mediated epidermal delivery (PMED). EXPERIMENTAL DESIGN: Human leukocyte antigen (HLA)-A*0201(+) disease-free melanoma patients were randomized to the PMED or i.m. arm, receiving eight vaccinations over 4 months. Patients received 4 microg or 2,000 microg per injection, respectively, of mouse gp100 DNA. Peripheral blood mononuclear cells were collected, cultured with gp100 peptides, and analyzed by tetramer and intracellular cytokine staining for responses to HLA-A*0201-restricted gp100 epitopes [gp100(209-217) (ITDQVPFSV) and gp100(280-288) (YLEPGPVTA)]. RESULTS: Twenty-seven patients with stage IIB-IV melanoma were analyzable for immune response. The only common toxicity was grade 1 injection site reaction in nine patients with no intergroup difference, and one dose-limiting toxicity of acute hypersensitivity occurred in a PMED patient with undiagnosed gold allergy. Four of 27 patients produced gp100 tetramer(+)CD8(+) T cells, all carrying the CCR7(lo)CD45RA(lo) effector-memory phenotype. Five of 27 patients generated IFN-gamma(+)CD8(+) T cells, one who was also tetramer-positive. Overall, vaccination induced a response in 30% of patients, which was not significantly associated with study arm or clinical outcome. However, the PMED group showed a trend toward increased IFN-gamma(+)CD8(+) T-cell generation (P = 0.07). CONCLUSION: A comparable efficacy and safety profile was shown between the i.m. and PMED arms, despite a significantly decreased dose of DNA used for PMED injection.