Low postoperative complications prevalence indicates that dental surgical procedures may be safety performed in patients eligible for liver transplantation after careful -preoperative evaluation.

IgG4-related disease is a systemic, multifocal, immune-mediated disorder that can affect multiple organs and may present as a tumor, with rare cases described in the maxillofacial region. A female patient, 53 years old, presenting tumor-like mass in the right mandibular region. Magnetic resonance imaging suggested well circumscribed nodular lesion adjacent to the branch / body of the mandible, extending posteriorly to the masseter muscle. During the surgical procedure of excision, a lesion was observed adhering to the right masseter muscle, but it was possible to remove it completely. Histopathological and immunehistochemical analysis suggested diagnosis of IgG4-related disease, furthermore, IgG4 serum count was increased. Actually, the patient continues on periodical followups in our service and by other specialties. Can be concluded that precise diagnosis of this pathology depends on many factors, being challenging and the treatment involves multidisciplinary evaluation due to the possibility of involvement of several other organs. KEY WORDS: IgG4; IgG4-related disease; Tumor FONSECA, V. J.; MANZANO DE MORAES, A. C.; OLATE, S.; ASPRINO, L. & DE MORAES, M. Immunoglobulin G4-Related disease of the maxillofacial region. A Rare Case.

Labial frenum is a common anatomical formation that connects a mobile structure to a fixed one. Its insertion is located on the lips and in the alveolar ridge at the midline. In some cases, it may present hypertrophy or atypical insertion in the alveolar ridge between the central incisors, causing diastema, malocclusion, periodontal disease, aesthetic problems, and dysphonia. In these situations, labial frenectomy is indicated and has the purpose of restoring the anatomy of the region and treating or preventing the disorders described. The present study aims to report a clinical case, which an upper labial frenectomy was performed in a classic technique adaptation and to review the literature about the procedure. The described technique has great relevance in clinical practice due to its easy execution, low cost, and satisfactory result.

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Delayed mandible reconstruction is a challenged situation in Oral and Maxillofacial surgery, due to great quantity of fibrous tissue and quality of covering soft tissue. The virtual surgical planning not only assists in previewing results, it assists in adjust the size and format of bone grafts by means of cutting surgical guides according to the anatomy of regional donor area too. We reported a clinical case a 20-years-old male patient attended to our service presented with segmented mandibular defect. Aiming to perform the procedure with more predictability, accuracy and less morbidity, we planned to remove the anterior portion of the iliac crest bone using a cutting guide computer aided design/computer aided manufacturing which was in accordance with the curvature and the size mandible bone defect.