Abstract The aim of this study was to describe the prevalence, clinicopathological, and prognostic features of acinic cell carcinoma (AciCC) of the oral and maxillofacial region. AciCC cases were retrospectively retrieved from 11 pathology centers of three different countries. Medical records were examined to extract demographic, clinical, pathologic, and follow-up information. A total of 75 cases were included. Females (65.33%) with a mean age of 45.51 years were mostly affected. The lesions usually presented as an asymptomatic (64.28%) nodule (95.66%) in the parotid gland (70.68%). The association of two histopathological patterns was the most common finding (48.93%) and the tumors presented mainly conventional histopathological grades (86.11%). Surgical treatment was performed in the majority of the cases (59.19%). Local recurrence was observed in 20% of the informed cases, regional metastasis in 30.43%, and distant metastasis in 12.50%. The statistical analysis showed that the cases with a solid histopathological pattern (p=0.01), high-grade transformation (p=0.008), recurrence (p=0.007), and regional metastasis (p=0.03) were associated with poor survival. In conclusion, high histopathological transformation, presence of nodal metastasis, and recurrence were prognostic factors for AciCC of the oral and maxillofacial region. prevalence clinicopathological (AciCC region 1 countries demographic clinical pathologic followup follow up information 7 included 65.33% 6533 65 33 (65.33% 4551 45 51 45.5 affected 64.28% 6428 64 28 (64.28% 95.66% 9566 95 66 (95.66% 70.68%. 7068 70.68% . 70 68 (70.68%) 48.93% 4893 48 93 (48.93% 86.11%. 8611 86.11% 86 (86.11%) 59.19%. 5919 59.19% 59 19 (59.19%) 20 3043 30 43 30.43% 1250 12 50 12.50% p=0.01, p001 p p=0.01 , 0 01 (p=0.01) highgrade grade p=0.008, p0008 p=0.008 008 (p=0.008) p=0.007, p0007 p=0.007 007 (p=0.007) p=0.03 p003 03 (p=0.03 survival conclusion 65.33 653 6 3 (65.33 455 4 5 45. 64.28 642 2 (64.28 95.66 956 9 (95.66 706 70.68 (70.68% 48.93 489 (48.93 861 86.11 8 (86.11% 591 59.19 (59.19% 304 30.43 125 12.50 p00 p=0.0 (p=0.01 p000 p=0.00 00 (p=0.008 (p=0.007 (p=0.0 65.3 (65.3 64.2 (64.2 95.6 (95.6 70.6 (70.68 48.9 (48.9 86.1 (86.11 59.1 (59.19 30.4 12.5 p0 p=0. (p=0.00 (p=0. 65. (65. 64. (64. 95. (95. 70. (70.6 48. (48. 86. (86.1 59. (59.1 30. 12. p=0 (p=0 (65 (64 (95 (70. (48 (86. (59. p= (p= (6 (9 (70 (4 (86 (59 (p ( (7 (8 (5

Resumen Los tumores odontogénicos (TOs) son un grupo heterogéneo de lesiones que incluyen hamartomas hasta neoplasias benignas o malignas. El presente estudio tuvo como objetivo revisar la literatura sobre los aspectos moleculares y genéticos de algunos TOs benignos. A partir de los estudios revisados, se apoya la idea de que las causas genéticas pueden tener un papel importante en la etiología y en la patogénesis de algunos TOs. Sin embargo, las investigaciones sobre el tema aún no permiten concluir de manera sólida los mecanismos definitivos involucrados en el desarrollo y en la progresión de los TOs. Se sugiere el desarrollo de más estudios moleculares y genéticos que evalúen muestras significativas de TOs para establecer su etiopatogenia, facilitar su proceso diagnóstico y enriquecer su abordaje terapéutico.

Abstract Odontogenic tumors (OTs) are a heterogeneous group of lesions that range from hamartomas to benign or malignant neoplasms. The present study aimed to review the literature regarding the molecular and genetic aspects from some benign OTs. Based on the review of the included studies, it is supported that genetic background may play an important role in the etiology and pathogenesis of OTs. However, the body of evidence on the subject still does not allow to conclude the definitive mechanisms involved in the development and progression of OTs. It is suggested the development of further molecular and genetic studies evaluating significant samples of OTs to establish its etiopathogenesis, facilitate its diagnostic process and enrich the therapeutic approaches.

Resumo Os tumores odontogênicos (TOs) são um grupo heterogêneo de lesões que variam desde hamartomas até neoplasias benignas ou malignas. O presente estudo teve como objetivo revisar a literatura sobre os aspectos moleculares e genéticos de alguns TOs benignos. A partir dos estudos revisados, apoia-se que as causas genéticas podem desempenhar um papel importante na etiologia e patogênese de alguns TOs. No entanto, as pesquisas sobre o assunto ainda não permitem uma conclusão sólida sobre os mecanismos definitivos envolvidos no desenvolvimento e progressão dos TOs. Sugere-se o desenvolvimento de mais estudos moleculares e genéticos para avaliar amostras significativas de TOs para estabelecer sua etiopatogenia, facilitar seu processo diagnóstico e enriquecer sua abordagem terapêutica.

Abstract This paper intends to describe the demand for referrals to the stomatology service requested by the medical teams for inpatients in a reference hospital in the south of Brazil. This research is a retrospective cross-sectional descriptive study focusing on data collection and assessment of information about referrals to the stomatology unit carried out from January 2008 to December 2018. All information was obtained from the hospital management software database, then transferred and analyzed individually for descriptive statistics. A total of 4433 cases were referred to the stomatology team, with an average of 403 cases by year. Hematology/hemato-oncology (37.3%) was the specialty asking for the majority of the referrals, followed by Oncology (20.4%) and Pneumology (8.2%). The mean patients’ profile was males (55.5%), receiving a diagnosis of oral mucositis (43.5%), and with the first and second decades of life being the most prevalent ones (34.9%), with a mean age of 34.8±22.3 years. The most common treatment performed by the stomatology team was the photobiomodulation therapy (44.8%). This retrospective study demonstrated the important profile of the stomatological care in hospitalized patients from a specific hospital, especially referred by the hematology/hemato-oncology team. These results evidenced the importance of the stomatology specialty in the hospital environment.