• 대한소아치과학회지
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• 제48권4호
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• pp.476-483
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• 2021

외상성 골낭은 임상 증상이 없으며 청소년기에 호발 한다. 주로 정기검진을 위한 파노라마 촬영시에 우연히 발견되며 병소는 비교적 경계가 뚜렷한 단일성의 방사선 투과상으로 가리비 껍질 모양의 변연을 보인다. 조직학적 소견으로 해면골내 공동과 얇고 느슨한 결합조직의 이장이 관찰된다. 상피세포의 이장이 존재하지 않는 것이 주된 조직학적 특징이다. 호발 부위는 하악 견치부와 제3대구치 사이이다. 하악 결합 부위에서는 드물게 나타난다. 외상성 골낭의 발병원인은 아직 명확하지 않다. 외상성 골낭은 외과적 적출술과 소파술로 치료되며 외과적인 처치 후 6 - 12 개월 정도 지나면 새로운 골로 채워진다. 대부분의 케이스에서 치료 전 외상성 골낭으로 진단 내리는 것은 한계가 있다. 따라서 본 증례에서는 방사선학적, 조직학적 검사를 통해 진단 내렸다. 두 환자 모두 외상 관련 병력은 없었다. 외과적 처치 후 파노라마와 CBCT를 이용하여 골성 치유를 확인하였다.

• Imaging Science in Dentistry
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• 제53권1호
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• pp.27-34
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• 2023

Purpose: The aim of this study was to clarify the influence of training with a different kind of lesion on the performance of a target model. Materials and Methods: A total of 310 patients(211 men, 99 women; average age, 47.9±16.1 years) were selected and their panoramic images were used in this study. We created a source model using panoramic radiographs including mandibular radiolucent cyst-like lesions (radicular cyst, dentigerous cyst, odontogenic keratocyst, and ameloblastoma). The model was simulatively transferred and trained on images of Stafne's bone cavity. A learning model was created using a customized DetectNet built in the Digits version 5.0 (NVIDIA, Santa Clara, CA). Two machines(Machines A and B) with identical specifications were used to simulate transfer learning. A source model was created from the data consisting of ameloblastoma, odontogenic keratocyst, dentigerous cyst, and radicular cyst in Machine A. Thereafter, it was transferred to Machine B and trained on additional data of Stafne's bone cavity to create target models. To investigate the effect of the number of cases, we created several target models with different numbers of Stafne's bone cavity cases. Results: When the Stafne's bone cavity data were added to the training, both the detection and classification performances for this pathology improved. Even for lesions other than Stafne's bone cavity, the detection sensitivities tended to increase with the increase in the number of Stafne's bone cavities. Conclusion: This study showed that using different lesions for transfer learning improves the performance of the model.

• Journal of Chest Surgery
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• 제10권2호
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• pp.226-229
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• 1977

Here represents a case of aneurysmal bone cyst which is very rare non neoplastic bone tumor especially in rib. The aneurysmal bone cyst usually arises from long bones of the upper and lower extemities and tt-e spine, which together account for 60 to 70 per cent of cases. In this case the tumor is found in right ninth rib on routine chest X-ray. It is resected successfully and the result is excellent.

• Nuclear Medicine and Molecular Imaging
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• 제42권4호
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• pp.328-332
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• 2008

Simple bone cyst (SBC) is very rare in adult ribs. The diagnosis basically relies on conventional radiography and occasionally on a. There has been no earlier publication on PET/CT diagnosis of SBC. We report a case of adult costal SBC diagnosed by positive $^{18}F$-fluorodeoxyglucose (FDG) uptake. Histology showed the FDG uptake to be associated with reactive woven bone formation and nonspecific chronic inflammation. Correlation of PET, CT, plain radiography and sonography are also described.

• 대한골관절종양학회지
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• 제5권1호
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• pp.76-81
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• 1999

Aneurysmal bone cysts are uncommon bony lesions of the spine. Approximately 3-20% of the aneurysmal bone cysts occur in the spine, predominantly in the lumbar region, but they may occur at the any level of the spine. These lesions commonly arise from the neural arch and occasionally invade the pedicle and the vertebral body. The clinical diagnosis of a spinal lesion can be very difficult in the early stages of the disease because specific symptoms and signs are usually absent or only amount to back pain. However, depending on the level of involvement and the extent of neurological compression, a wide variety of neurological symptoms and signs may appear, ranging from mild radicular symptoms to complete paraplegia or tetraplegia. Available treatment options include complete excision or curettage of the lesion with bone graft, but where excision cannot be achieved, low dose radiation or arterial embolization may be used. We report a case of aneurysmal bone cyst in the pedicle of the T10 spine with nonstructural scoliosis of $40^{\circ}$ Cobb's angle which was treated successfully with only curettage of the lesion.

• 대한정형외과학회지
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• 제56권5호
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• pp.445-449
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• 2021

슬관절내 삽입성 골낭종은 주로 십자인대의 골 부착부에 작은 낭종의 형태를 보이며, 보통 증상과 관련은 없는 것으로 알려져 있다. 저자들은 31세 남자의 슬관절에서 통증이 유발된 후방십자인대 대퇴 부착부 거대 삽입성 골낭종을 진단하고, 소파술과 골시멘트 충진술로 좋은 결과를 얻었기에 보고하고자 한다.

• Journal of Korean Neurosurgical Society
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• 제30권12호
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• pp.1422-1426
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• 2001

Neurenteric cysts are developmental cysts derived from embryonic endodermal layers. Fewer than 100 have been reported in which there were no associated bone or soft-tissue malformations and only six among those cases showed intramedullary location in the literatures. The authors report a 16-year-old young man with a thoracic intramedullary neurenteric cyst which presented with symptoms of axillary pain and paraparesis. The magnetic resonance imaging showed intramedullary mass extended from level of T3 to T7. There was no associated bone or soft-tissue anomaly. This cyst was partially excised and marupialized into subarachnoid space. The pathological findings were compatible with neurenteric cyst. Nine months later, the cyst recurred and at second operation, cyst wall was removed completely.

• 치과방사선
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• 제29권1호
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• pp.241-254
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• 1999

The purpose of this study was to investigate whether a radiometric analysis of radicular cysts and periapical granulomas is useful in the differential diagnosis. In this experiment, twenty-nine periapical radiographs of the radicular cyst and those periapical granuloma were used. The periapical radiography was taken by intraoral paralleling device. The X-ray film was digitized and digitally filtered to reduce film-grain noise. We estimated density difference of the inner/outer area, roundness or circularity, bone profile or scan line of the margin and cumulative percentage frequency curve of radicular cyst & periapical granuloma. The obtained results were as follows; 1. The differences in density between ROIs of inner and outer area of radicular cysts were smaller than those of periapical granulomas. 2. The equivalent circular diameter was over 6.3mm, there was significant difference between periapical cyst and periapical granuloma. 3. In differential diagnosis of radicular cyst and periapical granuloma using bone profile. sensitivity. specificity and accuracy were considerably high(0.83. 0.86. 0.86) respectively. 4. Cumulative percentage frequency curve of the radicular cyst was closer to the pseudo-pixel value of 50 than average curve, whereas periapical granuloma was closer to that of 0. Hence we conclude that digital radiometric features might be useful in the differential diagnosis between radicular cyst and periapical granuloma.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제33권5호
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• pp.425-429
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• 2011

Bone grafts are becoming increasingly common in oral and maxillofacial surgery to improve bone healing procedures. Bovine bone as a xenograft is a representative osteoconductor and space filler; however, sometimes complications, such as infection and wound dehiscence are encountered with its use. We report the result of an eight-year follow-up of a xenograft case and processing methods of inorganic bovine bone along with a review of the literature. Xenograft ($LUBBOC^{(R)}$) was used in a cyst enucleation site of the maxilla, as a bone substitute and space filler. Inflammation and infection were defined several times as lack of osseous contact between the graft and host bone, caused by remodeling failure over an eight-year period. Pathologic findings of the xenograft revealed dead bony trabeculae with inflamed fibrous tissue and actinomycosis.

• 대한족부족관절학회지
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• 제25권4호
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• pp.185-189
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• 2021

An aneurysmal bone cyst (ABC) can occur in many parts of the human body, but a primary ABC of the talus is extremely rare. ABCs are benign, but aggressively growing tumors that usually occur in the first two decades of life. Patients mainly complain of pain, limited movement of the involved joint or a palpable mass. Pain may worsen suddenly because of pathological fractures. If not treated properly, ABC has a risk of local recurrence, followed by the destruction of the joint and a significant functional deficit. While the complete removal of the bone tumor is essential, it is also important to treat the resultant bone defect after removal. The talus has an important part to play in weight-bearing. Therefore, an appropriate bone graft is required for large bone defects that occur after an ABC removal from the talus. We report a primary ABC of the talus in a 28-year-old male that was treated by curettage and a bone pillar pattern graft of autologous tricortical iliac crest bone. The patient had an excellent functional outcome with early weight-bearing, and there was no recurrence at 16 months of follow-up.