Queilite actínica ("Lábios de Marinheiro"): uma Revisão para o Clínico / Actinic cheilitis ("sailor's lips"): A review for the clinician

A Queilite Actínica (QA), também conhecida como "lábios de marinheiro", é uma patologia com potencial de malignização e, ainda que seja de fácil diagnóstico e prevenção, casos diagnosticados tardiamente podem evoluir para carcinoma de lábios. Seu principal fator etiológico é a exposição aos raios ultravioletas, e por este motivo, indivíduos que se expõem muito ao sol, incluindo militares, podem ser considerados grupo de risco para a doença. O objetivo principal deste trabalho foi descrever os principais fatores de risco e prognósticos da QA e apresentar uma revisão para o cirurgião-dentista, facilitando a identificação e conduta. Para tal, foi realizada busca de artigos pertinentes ao tema nas bases de dados Medline, Lilacs, SciELO e PubMed, de 1987 a 2022. O seguinte perfil do paciente com QA foi identificado: homem, na quinta década de vida, pele clara, com lesões no lábio inferior e com histórico de longo tempo de atividades ocupacionais ao ar livre/intensa exposição solar. O cirurgião-dentista possui papel fundamental na identificação dos grupos de risco, no reconhecimento precoce da doença e, em casos mais avançados, realizar o diagnóstico e o correto encaminhamento para atendimento especializado.

Actinic Cheilitis (AC), also known as "sailor's lips", is a premalignant pathology, and although it is easy to diagnose and prevent, late diagnosed cases may progress to lip carcinoma. Since its main etiological factor is exposure to ultraviolet rays, individuals often exposed to the sun, including military personnel, can be considered a risk group for the disease. The aim of this study was to describe the main risk and prognostic factors of AC and to create a clinical protocol for dental surgeons, making easier to identify and conduct each case. For this purpose, a search for articles relevant to the topic was carried out in Medline, Lilacs, SciELO and PubMed databases, from 1987 to 2022. The following AC patient profile was identified: male, in the fifth decade of life, fair skinned, with lesions on the lower lip and with a long history of outdoor occupational activities/intense sun exposure. The dentist has a fundamental role in identifying risk groups, early recognition of the disease and in more advanced cases, making the correct diagnosis and recommendation to specialized care.

Hpv impact on oropharyngeal cancer patients treated at the largest cancer center from Brazil.

Oropharyngeal squamous cell carcinoma (OSCC) is a fatal and highly incident disease. Although tobacco and alcohol consumption are the main risk factors associated with OSCC, a recent significant increase in OSCC HPV16 positive cases in high-income countries has been observed. However, it is not clear whether this change is also present in low- and middle-income countries. In this study, we evaluated HPV16 prevalence in 346 OSCC cases diagnosed in the largest Brazilian oncology public hospital by using the combination of two techniques, HPV16 E6 detection by qPCR and p16 immunohistochemistry. In total, 11.9% of cases were HPV16 E6 positive, 9.2% were p16 positive and 6.1% were positive in both analyses. There was a predominance of keratinizing-SCC, with only four HPV-positive cases showing basaloid-like or non-keratinizing-SCC. HPV infection had no impact on disease-free or overall survival, while alcohol use was an independent prognostic factor for overall survival. Most cases reported a high frequency of tobacco (94.6%) and alcohol consumption (88.2%), were of low education level, and typically presented at advanced clinical stages, indicating that the profile of Brazilian OSCC patients has not changed.

Evaluation of mast cells in periapical cysts, dentigerous cysts, and keratocystic odontogenic tumors.

BACKGROUND: Several cell types are associated with the development of cystic and tumoral odontogenic lesions. Among inflammatory cells, mast cells can be associated with their pathogenesis. The aim of this study was to analyze mast cells in periapical cysts, dentigerous cysts, and keratocystic odontogenic tumors. METHODS: Tissue sections were submitted to toluidine blue staining and immunohistochemistry with antibody anti-tryptase (clone G3). Mast cells were quantitated using Image-Pro Plus software to obtain the mean number of mast cells in three regions: epithelial, superficial portion of the fibrous wall and deep portion of the fibrous wall from 20 periapical cysts, 20 dentigerous cysts (six non-inflamed and 14 inflamed) and 20 keratocystic odontogenic tumors (four non-inflamed and 16 inflamed). RESULTS: The mean number of mast cells detected per lesion by immunohistochemistry (4.1) was higher than by histochemistry (1.5) (P<0.0001). Inflamed dentigerous cysts and keratocystic odontogenic tumors showed a higher mean number of mast cells than non-inflamed lesions in all regions. The deep region from all cysts showed the highest mean number of degranulated mast cells, except for non-inflamed keratocystic odontogenic tumors analyzed by immunohistochemistry. CONCLUSIONS: Immunohistochemical staining detected higher number of mast cells than histochemistry. The higher number of mast cells observed in inflamed lesions could indicate the participation of these cells in the inflammatory response in odontogenic lesions. The prevalence of degranulated mast cells in the deep region suggests intense activity of these cells, possibly related to growth of cystic lesions.

A rare case of cementoblastoma associated with the primary dentition.

BACKGROUND: Cementoblastoma is a rare odontogenic tumor with few cases reported in the literature involving deciduous teeth. CASE REPORT: A painful intraoral swelling in a young girl close to a primary mandibular first molar presented as a well-defined radiopaque mass attached to the tooth root. After enucleation and histopathological analysis the final diagnosis was cementoblastoma. DISCUSSION: This case highlights the relevance of cementoblastoma to dentists and maxillofacial surgeons, since this condition may mimic other intra-osseous maxillary lesions and require patient-specific treatment.

Difficulties in the diagnosis of plexiform ameloblastoma.

BACKGROUND: Plexiform ameloblastoma is a rare and benign odontogenic tumor which may reach grotesque proportions affecting over a region of lower molars. The correct diagnosis is essential to reduce this risk of local recurrences and obtain an effective treatment. CASE REPORT: A 10-year-old female patient, Caucasian, presented a complaint of painless facial asymmetry. The clinical and imaginological examinations showed an increase in volume in the left mandibular body related to radiolucent unilocular injury near the apex of the first molar, expansion of the vestibular cortical bone, and tooth root resorption ipsilaterally. The former intraosseous biopsy suggested an aneurysmal bone cyst. In reopening the previous marsupialization, a new biopsy was performed with histopathologic findings compatible with plexiform ameloblastoma associated with acute inflammation. Curettage was performed in the region associated with cryotherapy. At the last biopsy, the diagnosis of plexiform ameloblastoma was confirmed with multiple cystic formations and areas of foreign body reaction. The patient is being followed for 2 years and yet remains clinically and radiographically stable with no recurrence. DISCUSSION: This case reports the importance of selecting the correct area of biopsy of an intraosseous extended lesion to contribute to the diagnosis and treatment of plexiform ameloblastoma.

Maxillary hemophilic pseudotumor in a patient with mild hemophilia A.

Hemophilic pseudotumors are rare, but well known complications of severe hemophilia A, which most frequently develops at the femur, tibia, pelvic bones, iliac bones, or rarely in the cranium or gnathic bones. This report describes a case of hemophilic pseudotumor of the maxillary alveolar ridge that occurred in a boy with mild hemophilia A (14% factor VIII activity). The lesion, which presented as an alveolar mucosal swelling, responded well to enucleation, curettage, and intralesional fibrin glue injection.