Background/Aim: In the area of the jaw angle, osteolytic lesions can occur, the differential diagnosis of which can be difficult and require very different therapeutic measures. One of these lesions is lingual mandibular bone depression (LMBD). The aim of this study was to present the characteristics of the lesion in a group of LMBD patients and to differentiate it from other lesions. Patients and Methods: Radiological images of 21 patients with LMBD were examined. Results: The majority of LMBDs were located in the jaw angle. On cross-sectional images, the lesion could be distinguished from salivary tissue (n=2). One case of LMBD had an impact on the course of the fracture line in the mandibular trauma. Conclusion: LMBD is a developmental disorder of the mandible and only rarely of pathological importance. Imaging the lesion with cross-sectional images is preferable to using plain X-ray projections. In some cases, surgical exploration is essential for diagnosis.

中文翻译：

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舌下颌骨凹陷

背景/目的：在颌角区域可能发生溶骨性病变，其鉴别诊断可能很困难，需要非常不同的治疗措施。这些病变之一是舌下颌骨凹陷（LMBD）。本研究的目的是展示一组 LMBD 患者的病变特征，并将其与其他病变区分开来。患者和方法：检查了 21 名 LMBD 患者的放射影像。结果：大多数 LMBD 位于颌角。在横截面图像上，病变可以与唾液组织（n = 2）区分开来。1 例 LMBD 对下颌骨外伤骨折线的走向有影响。结论：LMBD 是一种下颌骨发育障碍，仅有很少的病理学重要性。使用横截面图像对病变进行成像比使用普通 X 射线投影更可取。在某些情况下，手术探查对诊断至关重要。