Pigmented villonodular synovitis (PVNS) is a relatively rare condition. The disorder almost always involves a single joint and the knee is most commonly affected. We report on three cases of localized PVNS that involved the patella fat pad and synovium. Diagnostic and therapeutic arthroscopies were performed, and typical findings of localized PVNS were found. Complete resection of the lesions were performed arthroscopically. Arthroscopy can be used as an effective diagnostic and therapeutic tool for identification and resection of intraarticular localized PVNS of the knee.
Adipose Tissue ; Arthroscopy ; Joints ; Knee* ; Patella ; Synovial Membrane ; Synovitis, Pigmented Villonodular*

No abstract available.
Hemorrhage* ; Intracranial Hemorrhages*

The displacement of an entire tooth into the adjacent anatomical area is an uncommon complication of a tooth extraction. We encountered a 23-year-old woman who had previously undergone surgery under local anesthesia to remove the lower third molar about 12 weeks prior and the upper third molar was extracted 2 days prior to visiting this hospital. Upon admission, she complained of a swallowing discomfort and a mouth opening limitation. Panoramic radiograph and a CT scan revealed a displacement of the entire tooth into the lateral pharyngeal space. The tooth was retrieved via the transoral approach under general anesthesia. The removed tooth had an indentation formed by a dental bur. Therefore, it was concluded that the tooth displaced into the lateral pharyngeal space was the lower third molar. This report describes an unusual case of a third molar that was displaced into the lateral pharyngeal space with a review of the relevant literature.
Anesthesia, General ; Anesthesia, Local ; Deglutition ; Female ; Humans ; Molar, Third* ; Mouth ; Tomography, X-Ray Computed ; Tooth ; Tooth Extraction ; Young Adult

TMJ internal derangement has been treated by the conservative methods and the surgical methods according to the clinical state. There are several surgical methods for treatment of TMJ internal derangement, such as disk repositioning and repair, diskectomy with and without grafts, articular surface contouring, high condylectomy, condylotomy, and arthroscopic surgery etc. Especially, it has been reported that the condylotomy produced the increase of the joint space, the pain relief, the elimination of the joint dysfunction due to the antero-inferiorly movement of the condyle, and the condylar morphologic change resulted from the progressive remodeling in TMJ without the surgical intervention within the TMJ. We have performed EVRO(extraoral vertical ramus osteotomy) to the 5 patients diagnosed as ADDWR(Anterior disk displacement with reduction) from June 1997 to December 1997 in the Chin-Hae military hospital. We diagnosed them with MRI and clinical examination. And we compared the preoperative symptoms with postoperative 2 months symptoms. They were compared by Helkimo index, mandibular mobility index, and pain scale. Anamnestic Index(Ai) was changed from 2.0 preoperatively to 1.2 postoperatively, clinical dysfunction score from 11.8 to 2.8, and Clinical Dysfunction Index(Di) from 2.8 to 1.2. The pain scale of the affected side was changed from 4.4 to 2.6 and that of the non-affeted side from 2.2 to 2.6. The maximal mouth opening was changed from 35.2mm to 40.9mm, right lateral excursion from 7.8mm to 8.0mm, left from 8.8mm to 7.0mm, and protrusion from 6.2mm to 6.2mm. In these results, we could not expect any excellent improvement of the clinical symptoms during the immediate postoperative periods. But we could observe the disappearance of the joint noise and the improvement of the clinical dysfunction score. On the basis of the results of the previous investigations about condylotomy effect which presented the condyle position were changed antero-inferiorly in the articular fossa during the immediate postoperative period, the displaced condyles may prevent wide mouth opening. Therefore it is elucidated that the improvement of the maximal mouth opening and other functions were restricted during the immediate postoperative periods. After long term follow-up period, the symptomatic and functional improvement will be expected by the passive repositioning of the proximal segment. We report the preliminary results with the related references.
Arthroscopy ; Diskectomy ; Follow-Up Studies ; Hospitals, Military ; Humans ; Joints ; Magnetic Resonance Imaging ; Mouth ; Noise ; Postoperative Period ; Temporomandibular Joint* ; Transplants

BACKGROUND: It is well-known that the giant congenital nevi prcgress to malignant, melanama more frequently than other benign melanocytic nevi but to date the laor tory methods for early detection of such progression were not avsilable. The proliferating cell uncleai antigen(PCNA) staining has been regsrded as an useful marker in determining prognosis of some maignant diseases. OBJECTIVE: The PCNA taining was performed as a predictive value of malignant transformation from benign meanocytic skin lesions. We investigated the differcnces between malignant melanoma and the benign lesions. MATERIAL AND METHODS: Immunohistochemical study was employee using anti-PCNA, anti-S-100, and anti-CD45RO antibody in 6 giant congenital nevi, 8 small and medium sized congenital nevi, 10 acquired nevi, and 10 malignant meanomas. Only cells positive for both PCNA and S-100, and negative for CD45RO on the serial sections were identified as melanocyts. RESULTS: The number of PCNA-posit,ive cells per 1000 melanocy,es averaged 6.0+7.5 in giant, congenital nevi, 2.9+1,9 in small and medium sized congenital novi, 3.1+2.7 in acquired nevi, and 61.5+ 39.4 in malignant, melanomas. Malignant melanomas showed onger intensity of PCNA staining than the other melanocytir nevi. CONCLUSION: There was not significant difference of the numter of PCNA-positive cells among the groups of congenital neviind PCNA staining can't be used in prditive measure of malignant. progression and studying mechansm of malignancy in giant congenital nevi. But, PCNA staining is considered as an useful method in differentiat,ing malignant melanoma from mllanocytic nevi.
Melanoma ; Nevus ; Nevus, Pigmented ; Prognosis ; Proliferating Cell Nuclear Antigen* ; Skin*

Trichoblastic fibroma is a rare benign tumor of hair germ with mixed epithelial-mesenchymal components. A 64-year-old female presented with an asymptomatic, skin-colored, firm nodule on the left knee joint. Histopathologic examination showed multiple tumor islands and strands eomposed of basaloids cells embedded in a moderately cellular fibroblastic stroma and the for vation of bud-like extension of tumor cell nest. The peripherel basaloid cells shovred a palisading arrangement and small keratinous cysts were formed in tumor islands.
Female ; Fibroblasts ; Fibroma* ; Hair ; Humans ; Islands ; Knee Joint ; Middle Aged

This study was performed to observe the effect of ultrasound(1.0MHz, 0.75W/cm2 and 1.0W/cm2) irradiation on cultured MC3T3-E1 cell, osteoblastic like cell with respect to the proliferation, protein synthesis, and alkaline phosphatase activity of the cells. The results were as follows: 1. The proliferation of MC3T3-E1 cells was increased on ultrasound irradiated group compared with control group. 2. The protein synthesis was not apparently increased on ultrasound irradiated group compared with control group. 3. The alkaline phosphatase activity level was not apparently increased on ultrasound irradiated group compared with control group. From the above results and other literatures, we could suggest that the ultrasound with the appropriate intensity and frequency may have important roles in stimulation of cell proliferation. Therefore the ultrasound may be used in the acceleration of the bone regeneration and bone fracture healing.
Acceleration ; Alkaline Phosphatase ; Bone Regeneration ; Cell Proliferation ; Fractures, Bone ; Osteoblasts ; Ultrasonography

No abstract available.

No abstract available.
Animals ; Horns* ; Nevus, Sebaceous of Jadassohn*

PURPOSE: To evaluate the pre-operative and the intra-operative factors including marginal fibrosis affecting the result of vitrectomy for macular hole. METHODS: The medical records of the patient who had been operated for idiopathic full-thickness macular hole from January 1997 to July 2000 were investigated retrospectively. RESULTS: Hole closure, as the implication of anatomical success, was seen in 28 eyes (84.8%) at 1 month after surgery and 23 eyes (69.7%) at the end of follow-up period. And the improvement of two or more Snellen line, as the implication of functional success, was seen in 17 eyes (51.5%). The smaller size of the hole was well correlated with higher rate of anatomical success (P=0.001). And there was a good correlation of higher anatomic success rate with the lack of marginal fibrosis around the hole (P=0.001). CONCLUSIONS: There must be more efforts and investigations on proper management of marginal fibrosis, which might help to improve the result of macular hole surgery.
Fibrosis* ; Follow-Up Studies ; Humans ; Medical Records ; Retinal Perforations* ; Retrospective Studies ; Vitrectomy