Anterior lingual mandibular bone depression: differential diagnosis of periapical inflammatory disorders.

Lingual mandibular bone depressions mainly affect the posterior region of the mandible. Depressions in the anterior region are rare, frequently posing difficulties in diagnosis. The aim of this article is to present a case of an anterior lingual mandibular bone depression (ALMBD) that was radiographically superimposed on the roots of anterior teeth. A 43-year-old man was referred for evaluation of a slight depression on the lingual surface of the anterior mandible. The depression was associated with a well-defined radiolucent area superimposed on the roots of the right canine and incisors. All teeth in the area proved to be vital, and cone beam computed tomography (CBCT) revealed a lingual depression in the area. The final diagnosis was an ALMBD, and the patient underwent clinical and radiographic follow-up examinations for 22 months that revealed no alterations in the area. When anterior mandibular radiolucencies are superimposed on the roots of the adjacent teeth, ALMBDs should be considered in the differential diagnosis along with periapical cysts and granulomas. Radiographic and CBCT analyses are useful to avoid unnecessary endodontic and surgical approaches.

Comparative clinicopathological study of intraoral sebaceous hyperplasia and sebaceous adenoma.

OBJECTIVE: The objective of this study was to compare the clinicopathological features of oral sebaceous hyperplasia and sebaceous adenoma. STUDY DESIGN: Clinical data, microscopical characteristics, and ki-67 immunoexpression were comparatively analyzed on 2 intraoral sebaceous adenomas, 6 intraoral sebaceous hyperplasias, and 21 normal intraoral sebaceous glands. RESULTS: Clinically, sebaceous glands presented as multiple separated papules, sebaceous hyperplasias as a single enlarged papule, and sebaceous adenoma as a well-defined nodule. Microscopically, sebaceous adenoma presented an increased number of lobules, smaller lobules, and a greater number of germinative/squamous cells. Sebaceous hyperplasia also had an increased number of lobules and fewer number of germinative/squamous cells, as compared to normal oral sebaceous glands. Ki-67 expression was seen only in germinative cells and counts were higher in sebaceous adenomas followed by hyperplasias and normal glands. CONCLUSIONS: Sebaceous hyperplasias and adenomas showed different clinical, microscopic, and proliferative characteristics, suggesting the usefulness of the studied criteria on diagnosis of these uncommon oral lesions.