PMC7762666_01
Computed tomography image, horizontal cross section, hard tissue mode. A rounded cavity is observed in the lingual side of the mandible from the right anterior to the premolar region. The margin of the cavity in the lingual side of the mandible is a high-density line, suggesting cortical bone, and is smooth. The mandibular canal is not connected with the cavity.
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CT in hard tissue mode showed a high-density line, suggesting cortical bone on the margin of the cavity in the lingual side of the mandible (Figure 1).
Computed tomography image, sagittal cross section, hard tissue mode. The lingual cortical bone recessed from the lingual to the buccal side is contiguous with the buccal cortical bone at the deepest point of the cavity. There is no connection of the apex of the adjacent #27 with the cavity in the lingual side of the mandible, and a high-density line suggests the presence of bony tissue between the apex of #27 and the cavity in the lingual side of the mandible.
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The lingual cortical bone was recessed from the lingual side to the buccal side and, at the most recessed point, was contiguous with the buccal cortical bone (Figure 2).
Computed tomography (CT) image, horizontal cross section, soft tissue mode. The inside of the cavity in the lingual side of the mandible has similar soft tissue density (CT number, 40-70 Hounsfield units (HU)) to the sublingual glands (CT number, 40-70 HU), with findings that suggest continuity with the sublingual glands.
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CT in soft tissue mode showed that the inside of the cavity in the lingual side of the mandible had similar soft tissue density (CT number, 40-70 Hounsfield units (HU)) to the sublingual glands (CT number, 40-60 HU) and was contiguous with the sublingual glands (Figure 3).
Magnetic resonance imaging, horizontal cross section, T1-weighted imaging. A rounded cavity is observed in the lingual side of the mandible from the right anterior to the premolar region. The margin of the cavity in the lingual side of the mandible exhibits a cortical bone structure, and the cavity's margin is smooth. A layer of myeloid tissue is observed in the cavity between the lingual cortical bone and the buccal cortical bone. The tissue in the cavity in the lingual side of the mandible has similar signal intensity to the sublingual glands and is contiguous with the sublingual gland tissue.
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Stafne bone defect was established based on the presence of a cavity in the lingual side of the mandible from the right anterior to the premolar region that was filled with salivary gland tissue connected to the sublingual gland tissue (Figures 4 and 5). Subsequently, regular imaging was performed, and the patient was followed up.
Magnetic resonance imaging, horizontal cross section, short T1 inversion recovery. There are no signs of tumors or inflammation.
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Stafne bone defect was established based on the presence of a cavity in the lingual side of the mandible from the right anterior to the premolar region that was filled with salivary gland tissue connected to the sublingual gland tissue (Figures 4 and 5). Subsequently, regular imaging was performed, and the patient was followed up.