Mucocele of the paranasal sinuses is a benign, slow-growing, expansile lesion. Maxillary sinus mucoceles are usually associated with painless bulging of the cheek; however, orbital expansion is rarely observed. Maxillary sinus mucoceles can be classified as primary or secondary according to their etiology. An impediment to sinus ostium ventilation is thought to be the cause of primary mucocele, while sequestering of residual mucosa after surgery in the wound and long-term retention of tissue fluid have been suggested to lead to the formation of secondary mucocele. This report presents 2 cases of primary and secondary mucoceles, with a focus on radiographic features. As primary and superiorly positioned secondary maxillary sinus mucoceles are uncommon and their close proximity to the orbit predisposes the patient to significant morbidity, the authors expect that this report will contribute to a better understanding and diagnosis of maxillary sinus mucocele involving the orbit.
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http://dx.doi.org/10.5624/isd.20210278 | DOI Listing |
J Med Case Rep
January 2025
Department of Oral and Maxillofacial Pathology, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
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View Article and Find Full Text PDFInt J Surg Pathol
January 2025
Department of Pathology and Forensic Medicine, Ribeirão Preto Medical School (FMRP/USP), University of São Paulo, Ribeirão Preto, SP, Brazil.
Merkel cell carcinoma (MCC) is an uncommon aggressive neoplasm, usually arising in sun-exposed skin of the head and neck. By immunohistochemistry, KRT20 and MCPyV positivity are found in about 90% and 80% of MCCs, respectively. Noteworthy, viral status in lip/oral cavity MCCs is poorly known.
View Article and Find Full Text PDFBMC Oral Health
January 2025
Department of Oral and Maxillofacial Surgery, Ahmet Kelesoglu Faculty of Dentistry, Karaman, 70200, Türkiye.
Objective: This study aims to determine the anatomical relationship between the posterior superior alveolar artery (PSAA) and the lateral wall of the maxillary sinus during preoperative radiological evaluations in the posterior maxillary dental region, as well as to evaluate the prevalence of PSAA and its potential associations with sinus pathologies.
Materials And Methods: This retrospective study is based on the analysis of Cone-Beam Computed Tomography (CBCT) data from 510 sinuses of 255 patients. The visibility of the PSAA vascular canal, artery diameters, vertical distance between the alveolar crest and the artery, and the distance to the sinus floor were measured in coronal sections.
Sci Prog
January 2025
Faculty of Medicine, Kilimanjaro Christian Medical University College, Moshi, Tanzania.
Primary solitary extramedullary plasmacytoma is a malignant neoplasm characterized by the monoclonal proliferation of plasma cells outside the bone marrow. The tumor rarely occurs in the sinonasal tract, accounting for about 4% of all non-epithelial sinonasal tumors. Herein, the authors describe a rare case of sinonasal extramedullary plasmacytoma in a 33-year-old man who presented with a 3-month history of progressively increasing nasal mass, causing obstruction.
View Article and Find Full Text PDFInt J Periodontics Restorative Dent
January 2025
Sinus membrane perforations are among the most commonly reported intraoperative complications encountered during maxillary sinus floor elevation procedures performed via the lateral window approach. Large perforations (> 10 mm) can pose a major clinical challenge, and often result in failed bone augmentation and poorer long-term implant survival. Owing to these challenges, even a highly skilled oral implant surgeon with advanced training in implantology faced with such perforations may abandon grafting procedures in favor of a reentry approach.
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