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The border of the cyst is seen as a narrow opaque margin contiguous with the lamina dura. In cysts that are actively enlarging, peripheral areas of the margin may not be present. Periapical cysts have a characteristic unilocular [8] shape on radiographs. There is also a severe border of cortication [9] between the cyst and surrounding bone ...
[13] [2] Protein content of cyst fluid below 4g% is diagnostic of odontogenic keratocysts. [2] Smaller and unilocular lesions resembling other types of cysts may require a biopsy to confirm the diagnosis. [10] On a CT scan, the radiodensity of a keratocystic odontogenic tumour is about 30 Hounsfield units, which is about the same as ...
On CT imaging, a mandibular dentigerous cyst appears as a well-circumscribed unilocular area of osteolysis that incorporates the crown of a tooth. Displacement of adjacent teeth may be seen and they may be partly eroded. Dentigerous cysts in the maxilla often extend into the antrum, displacing and remodeling the bony sinus wall.
A bone scan or bone scintigraphy / s ɪ n ˈ t ɪ ɡ r ə f i / is a nuclear medicine imaging technique used to help diagnose and assess different bone diseases. These include cancer of the bone or metastasis, location of bone inflammation and fractures (that may not be visible in traditional X-ray images), and bone infection (osteomyelitis). [1]
B. Non-epithelial-lined cysts 1. Solitary bone cyst; 2. Aneurysmal bone cyst; II. Cysts associated with the maxillary antrum 1. Mucocele; 2. Retention cyst; 3. Pseudocyst; 4. Postoperative maxillary cyst; III. Cysts of the soft tissues of the mouth, face and neck 1. Dermoid and epidermoid cysts; 2. Lymphoepithelial (branchial) cyst; 3 ...
It is considered that these cell rests proliferate to form epithelial lining of various odontogenic cysts such as radicular cyst under the influence of various stimuli. They are named after Louis-Charles Malassez (1842–1909) who described them.
On radiographs, the adenomatoid odontogenic tumor presents as a radiolucency (dark area) around an unerupted tooth extending past the cementoenamel junction.. It should be differentially diagnosed from a dentigerous cyst and the main difference is that the radiolucency in case of AOT extends apically beyond the cementoenamel junction.
Periapical granuloma, [1] also sometimes referred to as a radicular granuloma or apical granuloma, is an inflammation at the tip of a dead (nonvital) tooth. It is a lesion or mass that typically starts out as an epithelial lined cyst, and undergoes an inward curvature that results in inflammation of granulation tissue at the root tips of a dead tooth.