• 대한두경부종양학회지
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• 제33권2호
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• pp.35-38
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• 2017

Neurilemmomas are benign tumors originating from Schwann cells, and may occur in various nerves; however, they rarely originate from the lingual nerve. When a lingual nerve neurilemmoma develops in the submandibular space, it can be challenging to diagnose it preoperatively, and this tumor can be misdiagnosed as a usual submandibular gland tumor owing to the rarity and a lack of knowledge about lingual nerve neurilemmomas. Therefore, it is important to consider neurilemmoma in the differential diagnosis in cases where the characteristics of the tumor do not correspond with the typical findings of submandibular gland tumors, in order to avoid inadvertent sacrifice of the nerve because of incorrect diagnosis of a salivary gland tumor. Herein, we report a lingual nerve neurilemmoma in the submandibular space, along with a literature review, to highlight the clinical significance and improve understanding of this type of tumor.

• Imaging Science in Dentistry
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• 제52권3호
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• pp.259-266
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• 2022

Purpose: This study aimed to evaluate the clinical usefulness of magnetic resonance (MR) neurography using the 3-dimensional double-echo steady-state with water excitation (3D-DESS-WE) sequence for the preoperative delineation of the facial and lingual nerves. Materials and Methods: Patients underwent MR neurography for a tumor in the parotid gland area or lingual neuropathy from January 2020 to December 2021 were reviewed. Preoperative MR neurography using the 3D-DESS-WE sequence was evaluated. The visibility of the facial nerve and lingual nerve was scored on a 5-point scale, with poor visibility as 1 point and excellent as 5 points. The facial nerve course relative to the tumor was identified as superficial, deep, or encased. This was compared to the actual nerve course identified during surgery. The operative findings in lingual nerve surgery were also described. Results: Ten patients with parotid tumors and 3 patients with lingual neuropathy were included. Among 10 parotid tumor patients, 8 were diagnosed with benign tumors and 2 with malignant tumors. The median facial nerve visibility score was 4.5 points. The distribution of scores was as follows: 5 points in 5 cases, 4 points in 1 case, 3 points in 2 cases, and 2 points in 2 cases. The lingual nerve continuity score in the affected area was lower than in the unaffected area in all 3 patients. The average visibility score of the lingual nerve was 2.67 on the affected side and 4 on the unaffected side. Conclusion: This study confirmed that the preoperative localization of the facial and lingual nerves using MR neurography with the 3D-DESS-WE sequence was feasible and contributed to surgical planning for the parotid area and lingual nerve.

• 한국임상수의학회지
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• 제32권6호
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• pp.508-510
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• 2015

7살의 중성화된 수컷 보스턴테리어 개가 호흡곤란과 편측성 목부위 혹으로 내원하였다. 신체검사에서 왼쪽 아래턱밑 부위의 혹이 촉진되었다. 컴퓨터단층촬영 검사 결과 이 혹은 왼쪽 혀정맥 유래의 종양으로 의심되었다. 보호자의 거부로 치료가 진행되지 못했으며 내원 10일 후 호흡부전으로 폐사하였다. 부검에서 경계가 분명한 혹이 왼쪽 후두부위에서 확인되었으며 병리조직학적, 면역조직화학적 검사가 시행되었다. 컴퓨터단층촬영, 병리조직학적, 면역조직화학적 검사를 토대로 왼쪽 혀정맥에서 유래한 목부위 곁신경절종으로 최종진단되었다. 본 증례보고는 개에서 발생한 혀정맥 유래 목부위 곁신경절종의 임상적, 컴퓨터단층촬영, 병리조직학적 및 면역조직화학적 특징들을 잘 나타내고 있다.

• Imaging Science in Dentistry
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• 제40권3호
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• pp.149-153
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• 2010

Brown tumor is usually diagnosed at the terminal stage of hyperparathyroidism. Diagnosis of this tumor is confirmed by endocrinologic investigations along with clinical and radiographic examination. Radiographical differential diagnosis of this tumor includes central giant cell granuloma, aneurysmal bone cyst, metastatic tumor, multiple myeloma, and Paget disease. This report presents a rare case of multiple brown tumors occurring at the maxilla and mandible, which was initially misdiagnosed as central giant cell granuloma. Plain radiographs demonstrated multiple well-defined multilocular radiolucency. CT images showed soft tissue mass with low attenuated lesions, perforation of the lingual cortical plate, and a heterogeneous mass at the right thyroid lobe. These findings were consistent with parathyroid adenoma. The patient had hypercalcemia, hypophosphatemia, and elevated alkaline phosphatase level. Surgical excision of the tumor was performed. No recurrence was observed during a 28-month follow-up.

• Korean Journal of Radiology
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• 제2권1호
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• pp.42-51
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• 2001

Because the tongue is superficially located and the initial manifestation of most diseases occurring there is mucosal change, lingual lesionscan be easily accessed and diagnosed without imaging analysis. Some lingual neoplasms, however, may manifest as a submucosal bulge and be located in a deep portion of the tongue, such as its base; their true characteristics and extent may be recognized only on cross-sectional images such as those obtained by CT or MRI. Some uncommon tongue neoplasms may have characteristic radiologic features, thus permitting quite specific radiologic diagnosis. Lipomas typically manifest at both CT and MR imaging as homogeneous nonenhancing lesions. Relative to subcutaneous fat they are isoattenuating on CT images, and all MR sequences show them as isointense. Due to the paramagnetic properties of melanin, metastases from melanotic melanoma usually demonstrate high signal intensity on T1-weighted MR images and low signal intensity on T2-weighted images. Although the radiologic findings for other submucosal neoplasms are nonspecific, CT and MR imaging can play an important role in the diagnostic work-up of these unusual tumors. Delineation of the extent of the tumor, and recognition and understanding of the spectrum of imaging and the pathologic features of these lesions, often help narrow the differential diagnosis.

• Imaging Science in Dentistry
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• 제42권1호
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• pp.61-64
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• 2012

Keratocystic odontogenic tumor (KCOT) is a benign odontogenic tumor with a potentially aggressive and infiltrative behavior. KCOT is most commonly occurred in mandible and demonstrate a unilocular, round, oval, scalloped radiolucent area, while large lesions may appear multilocular. An important characteristic of KCOT is its propensity to grow in an antero-posterior direction within medullary cavity of bone causing minimal expansion. Definitive diagnosis relies on histological examination. In this report, a KCOT that had an expansion both buccal and lingual cortical bone is described including its features in computed tomography and ultrasonographic exams. The lesion was removed surgically via an intraoral approach under local anesthesia and histologically reported as a KCOT.

• 한국임상수의학회지
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• 제33권1호
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• pp.30-33
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• 2016

혀 뿌리 부위의 종양, 특히 종양이 정상으로 보이는 점막 아래에 위치해 있는 경우 발견하고 진단하기가 어렵다. 전산화단층촬영법, 특히 조영후 영상은 혀의 종양을 평가하고 경부 림프절을 포함한 인근 조직을 평가하기에 유용하다. 그러나 종양을 확진하기 위해서는 조직병리검사가 필요하다. 본 증례는 개에서 혀의 뿌리부터 몸통에 걸쳐 종양이 발생하였으며 환자는 유연과다 및 섭식장애 증상으로 전원되었다. 구강검사 결과 혀의 운동성 장애가 관찰되었으며 전산화단층촬영으로 혀 종양이 확인되었다. 2달 뒤 사후에 개의 혀에서 조직을 채취하여 조직병리검사를 실시한 결과 혀의 종양은 편평세포암종으로 진단되었다.

• Imaging Science in Dentistry
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• 제38권4호
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• pp.229-231
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• 2008

Brown tumor is a histologically benign lesion that is a serious complication of renal osteodystrophy because it may result in severe deformity and discomfort. We report a case of brown tumor, which occurred in a 35-year-old woman with chronic renal failure, who had been treated with hemodialysis for 14 years. The lesion was found on the lingual side of the mandible. Standard panoramic radiograph showed generally decreased bone mineral density, loss of lamina dura, and thin cortical plates. Computed tomography (CT) revealed multilocular expansile lesions with heterogeneous attenuation in the anterior mandible, as well as generalized trabecular alteration with homogeneous sclerosis, and thinning or obliteration of cortical plates. Excision of the mandibular lesion and curettage of the affected bone were performed. (Korean J Oral Maxillofac Radiol 2008; 38: 229-31)

• 한국수의병리학회:학술대회논문집
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• 한국수의병리학회 2003년도 추계학술대회초록집
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• pp.53-53
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• 2003

This benign canine histiocytoma was the most common single tumor type, followed lipoma, adenoma, soft tissue sarcoma, mast cell tumor and lymphosarcoma [2]. Canine cutaneous histiocytoma (CCH) most commonly occur as solitary lesions, head and pinnae are prefermential sites, that undergo spontaneous regression. The histologic appearance varies greatly, depending on the age of the lesion and the degree of necrosis and secondary inflammation. The age-specific incidence rate for CCH drops precipitously after 3 years, although histiocytomas occur in dogs of all ages [5]. Their etiology and pathogenesis are unknown. This case reports the gross and histopathological findings of canine cutaneous histiocytoma of observed in a young dog with localized calcification of lingual muscle. (omitted)

• The Journal of Advanced Prosthodontics
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• 제8권5호
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• pp.411-416
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• 2016

Patients who underwent resection of maxilla due to benign or malignant tumor, or accident will have defect in palatal area. They get retention, support and stability from remaining tissues which are hardly optimal. The advantage of swing-lock attachment design is having multiple contacts on labial and lingual side of the abutment teeth by retentive strut and palatal bracing component. Because the force is distributed equally to abutment teeth, abutment teeth of poor prognosis can be benefited from it. It is also more advantageous to cover soft tissue defects which are hard to reach with conventional prosthesis. A 56-year-old female patient who had undergone a maxillectomy due to malignant melanoma complaining of loose and unstable surgical obturator. Surveyed crowns were placed on #12, 26, and 27. Teeth #11, 21, 22, and 23 had lingual rest seat and #24 had mesial rest seat to improve stability and support of the obturator. This clinical report presents the prosthetic management of a patient treated with obturator on the maxilla using swing-lock attachment to the remaining teeth.