Diagnosis, Treatment and Prognosis of Low Grade Central Osteosarcoma / 대한골관절종양학회지

PURPOSE: We analyzed the diagnosis and the treatment outcomes of patients with central low grade osteosarcoma. MATERIALS AND METHODS: We retrospectively reviewed 16 patients with central low grade osteosarcoma were treated at out institution between 1994 and 2011. RESULTS: There were 4 men and 12 women with mean age of 26 years. Eleven patients were correctly diagnosed but 5 patients were misdiagnosed as osteoid osteoma, non ossifying fibroma, aneurysmal bone cyst, desmoplastic fibroma. 15 patients finally received wide margin en bloc excision and one of them treated under neoadjuvant chemotherapy. Final survival status was continuous disease free in 14 and 1 patient died of renal cell cancer. Remaining 1 with multifocal lesions is alive with disease for 7 years only treated radiation therapy on residual tumors. Nine (56%) of 16 tumors showed extra-osseous extension of tumor (56%) and 1 of them showed extra-compartmental tumors. CONCLUSION: The diagnosis of central low grade osteosarcoma is challenging, however, considering of the clinical suspicion, the typical findings of radiologic and pathologic features, proper diagnosis is needed. This tumor should be treated with wide excision, even after an intralesional excision, to avoid local recurrence or transformation to higher histologic grade.

Rupture of a Brachial Artery Caused by a Humeral Osteochondroma / 대한정형외과학회잡지

Pseudoaneurysm resulting from vascular impingement by an osteochondroma is extremely rare. The authors report on the case of a 16-year-old male who had a brachial artery pseudoaneurysm and vessel rupture associated with a humeral osteochondroma. This case suggests that pseudoaneurysm should be considered for the differential diagnosis in patients with soft tissue masses and a cuspidal osteochondroma located near the neurovascular bundle and recommends Doppler sonography or angiography.

Treatment Outcomes of Sacral Giant Cell Tumor / 대한골관절종양학회지

PURPOSE: We analyzed the treatment outcomes of patients with sacral giant cell tumor. MATERIALS AND METHODS: We retrospectively reviewed 7 patients with giant cell tumor of the sacrum who were treated at out institution between 1990 and 2012. RESULTS: There were 2 men and 5 women with mean age of 23.6 years. The average follow up was 52.3 months (range, 15-73 months). Six patients received surgical treatment. Intralesional curettage was performed for the 5 patients and marginal resection for another one patient. The remaining one patient was received radiation only. The patients who received radiation therapy and marginal excision had no residual or recurrent tumors. Of 5 patients with intra-lesional excision, one patient needs one more operation; two patients need two more operation for local control of the giant cell tumor. The remaining two patients failed to gain local control in spite of additional treatments. CONCLUSION: For the treatment of sacral giant cell tumor, intralesional resection can be one of the treatments option with minimal neurologic injury. Furthermore, radiation therapy can be recommended when complete excision or curettage is impractical.

Malignant Transformation of Benign Giant Cell Tumor / 대한골관절종양학회지

PURPOSE: We analyzed the oncologic outcome of the malignant transformed benign giant cell tumor of bone. MATERIALS AND METHODS: Between January 2000 and February 2012, 5 cases were referred with suspicious malignant transformation of benign giant cell tumor. No patients underwent radiation therapy. RESULTS: After referral, all patients received the wide excision of the tumor and its' pathologic diagnosis were osteosarcoma. As classified by the location of tumor lesion, 3 cases were located in the distal femur, 1 case was in the distal radius and 1 case was in the proximal femur. The average latent period between diagnosis of benign giant cell tumor and diagnosis of secondary malignant giant cell tumor was 49.2 months. (range, 24-126 months) The mean follow-up period was 21.6 months. There were subsequent local recurrence in 2 cases and 3 patients developed distant metastasis. All patients with lung metastasis were dead. CONCLUSION: Malignant transformation of benign giant cell tumor of bone can be occurred within 5 years. Therefore, when benign giant cell tumor suspicious malignant transformation, it is necessary to do more aggressive treatment.

Immunohistochemical Identification of Keratin in Cutaneous Tumors / 대한피부과학회지

Sixty cutaneous tumors of different types were investigated by means of immunoperoxidase technique(avidin-biotm-peroxidase complex method) with the use of antikeratin antibody. The results were as follows: 1. Squamous cell carcinomas, keratoacanthomas, and Bowen's disease exhibited strong reactivity with antikeratin antibody. 2. In squamous cell carcinomas and keratoacanthomas, the most heaviest staining patterns were detected in areas of keratinization and horn pearl formation. 3. Basal cell carcinomas and seborrheic keratosis were moderately stained, whereas Paget'a disease and metastatic carcinoma(oat cell carcinoma) did not contain keratin. 4. In some cases of basal cell carcinomas, the tumor cells were partially positive. 5. Malignant melanomas, nevi, malignant.lymphomas, neural tumors, hemangiomas, and dermatofibromas were uniformly negative.

A Case of Sebaceous Adenoma / 대한피부과학회지

Sebaceous adenoma is a benign organoid tumor of proliferating, incornpletely differentiated sebaceous glands. We report a case of sebaceous adenoma in a 15-year-old male. He had a 1.7 x 2.2 cm sized, asymptomatic, srnooth, round, raised, firm, reddish tumor on the left quadrant of abdomen. Histopathologically, the tumor was composed of lobules of irregular size and shape, and sharply demarcated from the surrounding tissue, The most lobules showed undifferentiated germinative and mature sebaceous cells in about equal number. Sebaceous cells in lobules were stained for prekeratin by means of avidin-biotin-peroxidase complex method. Ten months after surgical excision there was no evidence of recurrence.

A Case of Granular Cell Tumor / 대한피부과학회지

We report a case of granular cell tumor in a 62-year- old female. She had a 1. 5 cm sized, asymptomatic, firm nodule with central depression on the lateral aspect cf the left orbit. Histologically, the dermis had many large, pale tumor cells arranged in clusters and strands. The cells had a distinct cellular membrane and a pale cytoplasm filled with faintly eosiinophilic,coarse granules. The characteristic faint granules within the tumor cells are PAS-positive and diastase-resistant. The overlying epidermiis showed pseudocarcinomatous hyperplasia. We treated it with total excision.

A case of xanthoma showing unusual clinical manifestation / 대한피부과학회지

We report an atypieal case of xanthoma without evidence of underlying disease, A 50-year-old asymptomatic, yellowish, flat plaques on the upper eyelids, trunk and thighs, and huge, deep-seated tumors on anterior aspect of the neck, back and ankle areas of 3 years duration. Biopsies were performed at the lesions of the neck and hack. Two biopsy specimens showed the same findings of xanthoma, respectively. The appearance of refrigerated serum was clear. Paper electrophoresis didn't show elevation of any lipoprotein, suggesting normolipoproteinemia.