• Imaging Science in Dentistry
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• 제31권2호
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• pp.109-115
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• 2001

The ameloblastic carcinoma is an extremely rare, aggressive odontogenic neoplasm of the jaws. It is described as an ameloblastoma in which there is histologic evidence of malignancy in the primary or recurrent tumors, regardless of whether it has metastasized. We report an aggressive case of ameloblastic carcinoma of the mandible. A 68-year-old man with the complaint of the left facial swelling and intermittent pain was referred to our hospital. Serial images of panoramic radiograph, computed tomograph, and magnetic resonance imaging showed an ill-defined destructive radiolucent lesion of the left mandible. The lesion had typically aggressive behavior with extensive local destruction of bone and extended to the adjacent soft tissues. Bone scan revealed increased uptakes in the left mandibular body and ramus regions. Histological features were generally resembled with those of an ameloblastoma but with cytologic features of epithelial malignancy.

• 대한두개안면성형외과학회지
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• 제21권3호
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• pp.198-201
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• 2020

Primary lung cancer commonly metastasizes to the brain, bones, liver, and adrenal glands. In some cases, bone metastasis serves as the first presenting sign of lung cancer with bone pain and headache, but it is not common. The incidence of skull metastasis in lung squamous cell carcinoma (SCC) is low, and there have been only a few cases of skull metastases serving as the first sign of malignancy with skull mass and epidural bleeding; however, no similar cases have been reported regarding that of hematoma. We report a case of an 84-year-old man who first presented with a simple forehead hematoma and was eventually diagnosed with SCC of the lung.

• 대한두개안면성형외과학회지
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• 제20권2호
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• pp.139-143
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• 2019

Here we report a case of a focal atypical proliferative nodule (PN) arising from a congenital melanocytic nevus (CMN). Diagnosis was challenging because it had both benign and malignant clinical features. Unusual histopathology, immunohistochemistry, and intraoperative findings of this atypical PN are discussed. A 5-year-old girl was admitted for a congenital $5{\times}5cm$ sized scalp mass. This hemangioma-like soft mass showed biphasic characteristics such as a slow, gradual, and benign increase in size but worrisome dural invasion with cranial bone defect. We removed the scalp mass with clear resection margins. Interoperatively, we found that the cranial bone defect had already filled. Histopathologic examination showed CMN with focal atypical PN. The nodule showed sharp demarcation and cellular pleomorphism. However, in immunohistochemical study, Ki-67 proliferation index and expression levels of protein S-100 and Melan-A were very low. These were unusual findings of atypical PNs. Despite her worrisome preoperative radiologic features, she showed an indolent clinical course compatible with previously reported biologic behavior. The patient underwent follow-up inspection with magnetic resonance imaging every 6 months for up to 3 years. The nodule appeared to be stationary at the last visit.

• Imaging Science in Dentistry
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• 제51권2호
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• pp.217-222
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• 2021

Ewing sarcoma in the head and neck is rare, and metastasis from other bones to the mandible accounts for 0.7% of cases. This report presents a case of oral metastasis in a 24-year-old male patient diagnosed with Ewing sarcoma of the femur (p53 gene mutation and EWSR1-ERG fusion). The chief complaint was numbness in the mandible and pain for 1 month and a hardened, ulcerated exophytic lesion in the right retromolar region. Imaging exams revealed an unspecified thinning of the cortical bone of the inferior alveolar canal in the right mandibular ramus, associated with erosion of the alveolar bone. Histopathological analysis confirmed metastasis of Ewing sarcoma. The patient presented an aggressive disease progression and died 1 month after the oral diagnosis. It is important to recognize the signs and symptoms compatible with rare clinical outcomes, leading to an early diagnosis that can improve patients' quality of life and survival.

• Nuclear Medicine and Molecular Imaging
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• 제41권6호
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• pp.553-560
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• 2007

목적: F-18 FDG PET은 근골격계 종양에서 양성과 악성병변을 감별하는 유용성에 대하여 다양한 결과가 보고되고 있다. 저자들은 F-18 FDG를 이용한 PET/CT로 근골격계 종양의 maxSUV를 분석하고 비교하여 유용성을 알아보았다. 대상 및 방법: 치료 전 46개 병소(연부 조직 종양 양성/악성 : 11/12, 골종양 양성/악성 9/14)에 대하여 F-18 FDG PET/CT를 시행하였으며, 조직학적 검사로 확진하였다. 악성과 양성을 구분하는 maxSUV 절단값은 연부 조직 종양에서는 4.1, 골종양에서는 3.05로 하였다. 결과: 연부 조직 종양에서 양성(R=11; maxSUV $3.4{\pm}3.2$)과 악성(n=12; maxSUV $14.8{\pm}12.2$) 간에 maxSUV는 통계학적으로 유의하게 (p<0.001) 차이가 있었다. 민감도와 특이도는 각각 83%, 91%였다. 그러나 골종양에서는 양성 종양(n=9; maxSUV $5.4{\pm}4.0$)과 악성 골종양(n=14; maxSUV $7.3{\pm}3.2$) 간에 통계학적으로 유의한 차이를 보이지 않았다. 연부 조직 종양에서는 결절성 근막염이 위양성으로 나타났고(maxSUV=12.4) 골종양에서는 섬유성 골이형성증과 랑게르한스세포 조직구증식증 2예 및 골모세포종이 있었다. 결론: 연부 조직 종양에서 maxSUV는 양성과 악성을 감별하는데 유용하였다. 그러나 골종양의 경우에는 maxSUV가 낮은 경우에는 악성을 배제할 수 있었으나, maxSUV가 높은 경우에는 조직학적으로 조직구나 섬유모세포 등이 포함된 종양의 감별진단을 고려하여야한다.

• Journal of Korean Neurosurgical Society
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• 제30권12호
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• pp.1381-1387
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• 2001

Objective : Endodermal sinus tumor or yolk sac tumor is an uncommon malignant germ-cell neoplasm. This tumor was originally described as a germ cell tumor of the ovary or the testis. Intracranial endodermal sinus tumor is extremely rare and usually develop in the pineal or suprasellar regions. The authors evaluated the effect of adjuvant therapy(chemotherapy combined with radiotherapy) and radical removal of intracranial endodermal sinus tumors. Material and Methods : Between 1996 and 2001, four patients of intracranial endodermal sinus tumor were diagnosed with tumor marker(AFP) and biopsy. Three patients were treated with surgical removal and chemotherapy with cisplatin($20mg/m^2$), etoposide($100mg/m^2$) and bleomycin($15mg/m^2$) as well as external beam radiation therapy. We compared the management problems for these tumors. Result : In all three patients the tumor size and the level of tumor marker decresed during initial adjuvant therapy. However, Tumors showed regrowth with elevated AFP of serum and CSF possibly related to delayed chemotherapeutic treatment or inadequate administration of chemotherapeutic drugs due to severe bone marrow suppression. An additional chemotherapy and external radiation therapy were given, but tumors could not be controlled with leptomeningeal seeding. Conclusion : Radiotherapy is considered to be less effective. The combination chemotherapy with PVB(cisplatin, vinblastine, bleomycine) or PE(cisplatin, etoposide) is considered to be value in prolongation of the survival rate. But the role of chemotherapy in this tumor has not yet been clarified due to bone marrow suppression and drug resistance. Further study with large series of this tumor is necessary to establish the optimal management.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제42권5호
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• pp.307-314
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• 2016

We report a case of retiform hemangioendothelioma (RH) located in the infratemporal fossa and buccal area in a 13-year-old Korean boy. The tumor originated from the sphenoid bone of the infratemporal fossa area and spread into the cavernous sinus, orbital apex, and retro-nasal area with bone destruction of the pterygoid process. Tumor resection was conducted via Le Fort I osteotomy and partial maxillectomy to approach the infratemporal fossa and retro-nasal area. The diagnosis of RH was confirmed after surgery. In the presented patient, surgical excision was incomplete, and close follow-up was performed. There was no evidence of expansion or metastasis of the residual tumor in the 8 years after surgery. In cases of residual RH with low likelihood of expansion and metastasis, even though RH is an intermediate malignancy, close follow-up can be the appropriate treatment choice over additional aggressive therapy. To date, 29 papers and 48 RH cases have been reported, including this case. This case is the second reported RH case presenting as primary bone tumor and the first case originating in the oromaxillofacial area.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권1호
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• pp.109-114
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• 1996

수질의 형질세포종(extramedullary plasmacytoma)은 극히 드물게 나타나는 형질세포 악성종양(plasma cell malignancy)중 하나이며 치은에 발생한 경우는 거의 보고된바 없다. 다발성 골수종과의 감별진단은 조직학적 검사 후에도 여러 혈액검사 및 병이화학 검사가 필요하며 초기진단에 확실한 검사는 어렵다. Pahor등에 의하면 수질외 형질세초종의 5년생존률이 60%인 것에 비해 다발성 골수종에서는 5.7%를 보여 예후에 있어서 현저한 차이를 보이고 보든 수질외 형질세포종환자에 있어서 전신질환으로의 진행 가능성은 배제할 수 없으므로 장기간의 관찰이 필수적이라고 할 수 있다. 저자 등은 신장이식 수술 후 면역억제제를 사용한 15세 환자에서 치은에 발생한 형질세포을 치험하였기에 문헌 고찰과 함께 진단, 예후, 치료 및 면역 억제제와의 연관성에 관하여 보고하는 바이다.

• 대한핵의학회지
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• 제28권3호
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• pp.384-390
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• 1994

악성 종양의 척추 전이를 진단하는 데 bone scan과 MRI의 소견을 비교하여 보았다. 20명의 악성 종양환자를 대상으로 하였으며 환자의 평균 연령은 60.1 세였고 두 검사의 시행 간격은 평균 16.6일 이었다. 원발암은 폐암이 8명으로 가장 많았고 대장암, 위암, 유방암이 각각 2명, 전립선암, 갑상선암, 악성 임파종이 각각 1명이었으며 3명은 원발 장소를 모르는 전이성 선암 환자였다. 방법으로 척추를 7개의 구역 즉 경추(Cl-C7), 상부 흉추(D1-D4), 중부 흉추(D5-D8), 하부 흉추(D9-D12), 상부 요추(L1, 2), 하부 요추(L3-5) 및 천골로 나누어 총 105개 구역을 서로 비교하였다. 총 105개 구역 중 46개 구역에서 bone scan이나 MRI에서 양성으로 나왔는데 bone scan에서는 30개 구역(65.2%), MRI에서는 44개 구역(95.7%)에서 양성으로 나와 MRI 민감도가 bone scan 보다 높았다. 비교한 105개 구역 중 87개 구역(82.9%)에서 서로 일치하는 결과를 보인 반면 18개 구역(17.1%)에서 두 검사 결과가 서로 일치하지 않았는데 2개 구역에서는 bone scan에서 양성이나 MRI 검사에는 정상인 경우이고 16개 구역에서는 MRI 검사 결과 양성치나 bone scan에서 음성인 경우였다. 일치하지 않는 구역은 경추 구역이 가장 많았으며 진단별로 보면 위암의 경우에 가장 많았다. 한편 bone scan에서 12명의 환자에서 척추 이외의 다른 골격계에 전이 소견을 보였으며 2명의 환자 3개 구역이 양성으로 나왔으나 이 부위가 MRI 검사에 포함되지 않아 비교에서 제외되었다. 악성 종양의 척추전이를 진단하는데 MRI가 bone scan보다 민감하였지만 bone scan은 전골격계에 대하여 손쉽게 전이 여부를 평가할 수 있으므로 일차적 선별 검사로 매우 유용하다. 그리고 bone scan의 결과와 임상 소견이 일치하지 않을 때 MRI를 선택적으로 시행하면 진단의 정확성을 더욱 높일 수 있다.

• Imaging Science in Dentistry
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• 제32권3호
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• pp.181-185
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• 2002

The melanotic neuroectodermal tumor of infancy is a rare neoplasm arising in the first year of life. A 33-day-old female infant had an enlarged alveolar ridge on the right anterior maxilla. Intraoral examination revealed a nonulcerative swelling at the site. An intraoral radiograph showed an ill-defined radiolucency on the right anterior maxilla and displacement of primary incisors from their alveolar sockets. CT scans revealed an expansion of the surrounding bone and partial destruction of the anterior wall of the premaxilla. Histopathologic examination showed the cytoplasm of neuroblastic cells and eosinophilic, epithelioid cells frequently contained a dark brown granular pigment that stained positively to vimentin and HMB45, focally positive to NSE and cytokeratin. Four weeks after the operation, CT scans showed a rapidly growing soft tissue mass occupying right maxillary sinus encroaching to the orbit and nasal cavity. The final diagnosis was made as a malignant melanotic neuroectodermal tumor of infancy.