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Metastatic adenocarcinoma of the mandible.

Eui Hwan HWANG ; Ji Young HWANG ; Sang Rae LEE

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):219-223.

Metastases to the jawbones are found predominantly in the mandible and are rare in relation to the overall spectrum of oral malignancy. Analysis of the literature shows that the most frequent primary sites are the breast, lung, kidney, thyroid, and prostate. Adenocarcinoma of the mandible, whether primary or metastatic, are usually difficult to diagnose clinically. We report a case illustrating the clinical, radiographic, and histologic findings of a metastatic lung adenocarcinoma of the anterior mandible in a 58-year-old male.
Adenocarcinoma* ; Breast ; Humans ; Jaw ; Kidney ; Lung ; Male ; Mandible* ; Middle Aged ; Neoplasm Metastasis ; Prostate ; Thyroid Gland

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Benign neurilemmoma in the infratemporal fossa involving maxillary sinus and pterygopalatine fossa.

Jin Woo CHOI ; Min Suk HEO ; Chang Hyeon AN ; Jin Koo LEE ; Won Jin YI ; Sam Sun LEE ; Soon Chul CHOI

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):215-218.

Neurilemmoma is a benign tumor of the nerve sheath that arises on cranial and spinal nerve roots as well as along the course of peripheral nerves. A case of a neurilemmoma that arose in the left infratemporal fossa of a 29-year-old male was presented. Plain radiographs, enhanced computed tomography scan, and magnetic resonance imaging demonstrated a large, well-circumscribed, heterogeneously enhanced mass with extension into the pterygopalatine fossa. Displaced by the large mass, bowing-in of the posterior maxillary antral wall was noted and a provisional diagnosis of a benign soft tissue tumor was made. The mass was completely excised and a diagnosis of neurilemmoma was confirmed.
Adult ; Diagnosis ; Head and Neck Neoplasms ; Humans ; Magnetic Resonance Imaging ; Male ; Maxillary Sinus* ; Neurilemmoma* ; Peripheral Nerves ; Pterygopalatine Fossa* ; Spinal Nerve Roots

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A huge glandular odontogenic cyst occurring at posterior mandible.

Gi Chung CHUNG ; Won Jeong HAN ; Eun Kyung KIM

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):209-213.

The glandular odontogenic cyst is a rare lesion described in 1987. It generally occurs at anterior region of mandible in adults over the age of 40 and has a slight tendency to recur. Histopathologically, a cystic cavity lined by a nonkeratinized, stratified squamous, or cuboidal epithelium varying in thickness is found including a superficial layer with glandular or pseudoglandular structures. A 21-year-old male visited Dankook University Dental Hospital with a chief complaint of swelling of the left posterior mandible. Radiographically, a huge multilocular radiolucent lesion involving impacted 3rd molar at the posterior mandible was observed. Buccolingual cortical expansion with partial perforation of buccal cortical bone was also shown. Histopathologically, this lesion was lined by stratified squamous epithelium with glandular structures in areas of plaque-like thickening. The final diagnosis was made as a glandular odontogenic cyst.
Adult ; Diagnosis ; Epithelium ; Humans ; Male ; Mandible* ; Molar ; Odontogenic Cysts* ; Radiography, Panoramic ; Tomography, X-Ray Computed ; Young Adult

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Recurrent odontogenic keratocysts in basal cell nevus syndrome: Report of a case.

Byung Do LEE ; Jin Hoa KIM ; Dong Hoon CHOI ; Kwang Soo KOH ; Sang Rae LEE

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):203-207.

Basal cell nevus syndrome (BCNS) is principally characterized by cutaneous basal cell carcinomas, multiple odontogenic keratocysts and skeletal abnormalities. Our patient represented several characteristics of BCNS, such as, multiple odontogenic keratocysts, facial nevus, calcification of falx cerebri, parietal bossing and mental retardation. The cyst on posterior mandible showed recurrent and newly developing tendency.
Basal Cell Nevus Syndrome* ; Carcinoma, Basal Cell ; Humans ; Intellectual Disability ; Mandible ; Nevus ; Odontogenic Cysts* ; Rabeprazole

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Odontogenic myxoma: a case report with recent image modalities.

Jae Duk KIM ; Kwang Won KIM ; Sung Hoon LIM

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):199-202.

The odontogenic myxoma is an benign, slow growing neoplasm which is of ectomesenchymal origin. This neoplasm occurs almost exclusively in the jaw bones and comprises 0.2% to 17.7% of odontogenic tumors. The odontogenic myxoma may show a wide spectrum of radiographic appearances, unilocular, multilocular radiolucency and a distinct or diffuse border, making the differential diagnosis difficult. We present a case of the odontogenic myxoma in the maxilla with conventional and recent image modalities. Occlusal film revealed a medially extended multilocular lesion with intralesional fine and straight trabeculations from the scalloped margin and buccal expansion and thinning of cortical bone. Computed tomogram revealed lesion showed equivalent density to the muscles in the left maxillary sinus with partial cortical discontinuity of medial wall and the tennis-racket pattern with internal straight trabeculations. MRI revealed intermediate signal intensity on T1 weighted image and high signal intensity on T2 weighted image. In Gd enhanced MR image, the peripheral portions of the lesion were enhanced.
Diagnosis, Differential ; Jaw ; Magnetic Resonance Imaging ; Maxilla ; Maxillary Sinus ; Muscles ; Myxoma* ; Odontogenic Tumors ; Pectinidae ; Tomography, X-Ray Computed

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Metastasis of breast carcinoma to the whole mandible.

Yun Hoa JUNG ; Bong Hae CHO ; Kyung Soo NAH

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):195-197.

Metastatic tumors to the jawbones are an infrequent but not rare phenomenon. The most common site of distant primary tumor metastasis to the jaw bones is the breast. The clinical signs and symptoms, and radiographic appearance of these lesions can be quite variable. In this report, an invasive ductal carcinoma of the breast that metastasized to the whole mandible is presented. The patient's medical history revealed that she had undergone a modified radical mastectomy on the right breast eight years ago.
Breast Neoplasms* ; Breast* ; Carcinoma, Ductal ; Jaw ; Mandible* ; Mastectomy, Modified Radical ; Neoplasm Metastasis*

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Radiographic monitoring of healing process of buccal bifurcation cysts after marsupialization: Two cases.

Suk Ja YOON ; Byung Cheol KANG

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):191-194.

This report is to show healing process of two cases of buccal bifurcation cyst (BBC) developed from the mandibular deciduous second molars. Extracting the involved deciduous teeth led to marsupialization of the cysts and promoted eruption of the associated successors without orthodontic force. The cyst-associated premolars in the two cases erupted faster than the premolars on the contralateral noncyst side. The cysts were completely filled with normal bone. The monitoring radiographs showed bone healing, root formation, and path of eruption of the associated teeth after marsupialization of BBC.
Bicuspid ; Molar ; Radiography, Dental ; Radiography, Panoramic ; Tooth ; Tooth Eruption ; Tooth, Deciduous

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Diagnostic accuracy of artificially induced vertical root fractures: a comparison of direct digital periapical images with conventional periapical images.

Ji Un LEE ; Ki Jeong KWON ; Kwang Joon KOH

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):185-190.

PURPOSE: To compare the diagnostic accuracy for the detection of root fractures in CMOS-based digital periapical images with conventional film-based periapical images. MATERIALS AND METHODS: Sixty extracted single-root human teeth with closed apices were prepared endodontically and divided into two groups; artificially induced vertical root fracture group and control group. All radiographs were obtained using the paralleling technique. The radiographs were examined by 4 observers three times within a 4 week interval. Receiver operating characteristic (ROC) analysis was carried out using data obtained from four observers. Intra- and inter-examiner agreements were computed using kappa analysis. RESULTS: The area under the ROC curve (Az) was used as an indicator of the diagnostic accuracy of the imaging system. Az values were as follows: direct-digital images; 0.93, film-based images; 0.92, and inverted digital images; 0.91. There was no significant difference between imaging modalities (P< 0.05). The kappa value of interobserver agreement was 0.42 (range: 0.28-0.60) and intra-observer agreement was 0.57 (range: 0.44-0.75). CONCLUSION: There is no statistical difference in diagnostic accuracy for the detection of vertical root fractures between digital periapical images and conventional periapical images. The results indicate that the CMOS sensor is a good image detector for the evaluation of vertical root fractures.
Humans ; Radiography, Dental, Digital ; ROC Curve ; Tooth ; Tooth Fractures

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The influence of X ray beam angulation on the fractal analysis of trabecular architecture in human dry mandible using standardized tile counting method.

Kyung Hee LEE ; Sun Bok LEE ; Chang Hyeon AN ; Min Suk HEO ; Won Jin YI ; Kyung Hoe HUH ; Moo Soon PARK ; Sam Sun LEE ; Soon Chul CHOI

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):179-183.

PURPOSE: The purpose of this study is to examine the effects of X-ray beam angulation on the fractal dimension of trabecular bone structure of human dry mandible using the tile counting method. MATERIALS AND METHODS: We divided 5 human dry mandibles into an angle and a molar groups depending on the regions and deciding the region of interest (ROI). When contrasted with the ROI, the inferior cortex was appointed to be low and the lines perpendicular to the buccal cortex were appointed to be the standard angle. Direct digital intraoral radiographs were obtained from 9 different projection angles. We analyzed statistically the fractal dimension using the tile counting method. RESULTS: There was a statistically significant difference in the fractal dimension of the regions and the mandibles, but there was no statistically significant difference in the fractal dimension according to the X-ray beam angulation. CONCLUSION: There is no statistically significant effect of the angle of the projection on the fractal dimension of trabecular bone structure of a human dry mandible according to the tile counting method.
Fractals* ; Humans* ; Mandible* ; Molar ; Radiography, Dental, Digital

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Current status and installation standard of dental PACS.

Chang Seo PARK ; Kee Deog KIM ; Hyok PARK ; Ho Gul JEONG

Korean Journal of Oral and Maxillofacial Radiology.2004;34(4):175-178.

PURPOSE: Picture Archiving and Communication System (PACS) is difficult to implement in the best of situations, but evidence is growing that the benefits are significant. The aims of this study are to analyze the current status of full PACS and establish successful installation standard of dental PACS. MATERIALS AND METHODS: Materials and methods were based on the investigation of current working status and installation standard of PACS, and observation of variable issues to installation of dental PACS. RESULTS: By September 30, 2004, full PACS implementations in their facilities were 88.1% in specialized general hospitals (37 installations out of total 42 hospitals), 59.8% in general hospitals (144 installations out of total 241 hospitals), 12.3% in medical hospitals (116 installations out of total 941 hospitals) and 3.6% in dental hospitals (4 installations out of total 110 hospitals) Only 4 university dental hospitals currently have installed and are operating full PACS. Major obstacle to wide spread of dental PACS is initial high investments. CONCLUSIONS: Clinical environments of dental PACS differed from medical situation. Because of characteristic dental practice, the initial investments for dental PACS are generally much greater than those of medical PACS. Also new economic crisis makes users scruple. The best way to overcome these limitations is to establish an economic installation standard for dental PACS. Also the clear technical communication between the customer and the supplier before both sides are committed to the obstacles are critical to its success.
Hospitals, General ; Investments ; Radiology Information Systems

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