• The Journal of the Korean bone and joint tumor society
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• v.14 no.1
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• pp.68-72
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• 2008

Parachordoma is an extremely rare tumor that histologically resembles chordoma of axial skeleton but occurs in a peripheral site. It is considered an indolent neoplasm with potential for local recurrence. We present a case of soft tissue parachordoma at inguinal subcutaneous tissue which recurred 2 months after primary simple excision under local anesthesia and was performed revisional wide excision. Bone scan showed no other metastatic lesion. Immunohistochemical findings revealed tumor cells to be reactive to EMA, S-100 protein, vimentin and cytokeratin.

• Journal of Korean Dental Science
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• v.9 no.1
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• pp.35-41
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• 2016

Langerhans cell histiocytosis (LCH) is characterized by proliferation of histiocyte-like cells (Langerhans cell histiocytes) with characteristic Birbeck granules, accompanied by other inflammatory cells. Treatments of LCH include surgery, chemotherapy, and radiotherapy. One of the representative forms of chemotherapy is intralesional injection of steroids. Surgical treatment in the form of simple excision, curettage, or even ostectomy can be performed depending on the extent of involvement. Radiotherapy is suggested in case of local recurrence, or a widespread lesion. This article shows the case of repetitively recurrent LCH of a 56-year-old man who had been through surgical excision and had to have marginal mandibulectomy and radiotherapy when the disease recurred. After the first recurrence occurred, lesions involved the extensive part of the mandible causing pathologic fracture, so partial mandibular bone resection was performed from the right molar area to the left molar area followed by the excision of the surrounding infected soft tissues. The resected mandibular bone was reconstructed with a segment of fibula osteomyocutaneous free flap and overdenture prosthesis supported by osseointegrated implants.

• Journal of the korean academy of Pediatric Dentistry
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• v.34 no.2
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• pp.349-353
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• 2007

Mucocele is a clinical term of the localized superficial mucosal swelling caused by salivary retention after the obstruction or the rupture of minor salivary ducts. Various treatment methods have been suggested to lower its recurrence rate, including complete excision of lesion Biopsy punch can be used easily and simply for complete excision of mucocele. It has several advantages, such as convenience in use, low bleeding tendency, and nearly no requirements for post-operative management. In this case, biopsy punch was used for the removal of mucocele in an uncooperative child, which enable fast, simple and safe procedure, with a good result.

• Korean Journal of Head & Neck Oncology
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• v.12 no.2
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• pp.161-168
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• 1996

The neuorogenic tumor is known to be originated from neural crest, and the involved cells are Schwann cell, ganglion cell, and paraganglion cell. The Schwannoma, neurofibroma, and malignant schwannoma arise from the schwann cell, ganglioneuroma is from ganglion cell, and carotid body tumor and glomus tumor are originated from paraganglion cell. Authors reviewed thirty-eight patients of the neurogenic tumors in the head and neck, excluding intracranial tumor and Von-Recklinghausen disease, surgically treated at the Department of Surgery, Pusan Paik Hospital from January 1981 to May 1996. Of the 38 cases, 28 cases were schwannoma, 6 cases neurofibroma, 2 cases malignant schwannoma, and 2 cases paraganglioma. These tumors occurred at any age, but the majority of patients occurred in the fourth decade of life. There was female preponderance (M : F=1 : 1. 53) in sex ratio. The lateral cervical region was the most common distribution. 12 cases arose from the anterior triangle of neck, and 12 cases from the posterior triangle of neck. The major nerve origin of tumor could be identified in 30 cases (80%). 11 cases were treated by simple excision, and partial excision was 3 cases. Excision with parotidectomy 1 case, enucleation 11 cases, enucleation with parotidectomy 7 cases, radical neck dissection 1 cases, upper neck dissection 2 cases, suprahyoid dissection 1 case, Caldwell­Luc operation 1 case. The postoperative complications were hoarseness (2 cases), facial palsy (1 case), Homer syndrome (1 case), and hypoesthesia of tongue (1 case).

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.2
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• pp.1035-1039
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• 2014

Aim: To evaluate the operative, oncologic and obstetric outcomes of the loop electrosurgical excision procedure (LEEP) in cases with cervical neoplasia. Materials and Methods: A retrospective cohort study was conducted on patients who were suspected of cervical neoplasia and therefore undergoing LEEP at Siriraj Hospital, Mahidol University, Thailand, during 1995-2000. Outcome measures included operative complications in 407 LEEP patients and long-term outcomes in the 248 patients with cervical intraepithelial neoplasia (CIN) who were treated with only LEEP. Results: There were 407 patients undergoing LEEP; their mean age was $39.7{\pm}10.5$ years. The histopathology of LEEP specimens revealed that 89 patients (21.9%) had lesions ${\leq}CIN$ I, 295 patients (72.5%) had CIN II or III, and 23 patients (5.6%) had invasive lesions. Operative complications were found in 15 patients and included bleeding (n=9), and infection (n=7). After diagnostic LEEP, 133 patients underwent hysterectomy as the definite treatment for cervical neoplasia. Of 248 CIN patients who had LEEP only, seven (2.8%) had suffered recurrence after a median of 16 (range 6-93) months; one had CIN I, one had CIN II, and five had CIN III. All of these recurrent patients achieved remission on surgical treatment with re-LEEP (n=6) or simple hysterectomy (n=1). A significant factor affecting recurrent disease was the LEEP margin involved with the lesion (p=0.05). Kaplan-Meier analysis showed 5-year and 10-year disease-free survival (DFS) estimates of 99.9%. Twelve patients became pregnant a total of 14 times, resulting in 12 term deliveries and two miscarriages - one of which was due to an incompetent cervix. Conclusions: LEEP for patients with cervical neoplasia delivers favorable surgical, oncologic and obstetric outcomes.

• Asian Pacific Journal of Cancer Prevention
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• v.17 no.7
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• pp.3185-3190
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• 2016

Background: This study was designed to compare radioguided versus routine wire localization of nonpalpable non-malignant breast lesions in terms of efficacy for complete excision, ease of use, time saving, and cosmetic outcome. Materials and Methods: Patients with non-palpable breast masses and non-malignant core biopsy results who were candidates for complete surgical lumpectomy were enrolled and randomly assigned to radioguided or wire localization groups. Radiologic, surgical, and pathologic data were collected and analyzed to determine the difficulty and duration of each procedure, ease of use, accuracy, and cosmetic outcomes. Results: This prospective randomized study included 60 patients, randomly divided into wire guided localization (WGL) or radioguided occult lesion localization (ROLL) groups. The mean duration of localization under ultrasound guidance was shorter in the ROLL group (14.4 min) than in the WGL group (16.5 min) (p<0.001). The ROLL method was significantly easier for radiologists (p=0.0001). The mean duration of the surgical procedure was 22.6 min (${\pm}10.3min$) for ROLL and 23.6 min (${\pm}9.6min$) for WGL (p=0.6), a non-significant difference. Radiography of the surgical specimens showed 100% lesion excision with clear margins, as proved by pathologic examination, with both techniques. The surgical specimens were slightly heavier in the ROLL group, but the difference was not significant (p=0.06). Conclusions: The ROLL technique provides effective, fast, and simple localization and excision of non-palpable non-malignant breast lesions.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.359-364
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• 2006

Interference can seriously degrade the performance of GPS receiver because GPS signal has extremely low power at earth surface. This paper presents a Narrowband Interference Excision Filter (NIEF) in frequency domain that removes narrowband interferences with small signal loss. A NIEF transforms the received GPS signals with interferences into the frequency domain with FFT and then compute statistics such as mean and standard deviation to determine an excision threshold. All spectrums exceeding the threshold are removed and the remaining spectrums are restored by IFFT. A NIEF effectively can remove various and strong interferences with a simple structure. However, the signal power loss is unavoidable during FFT and IFFT. Besides the hamming window and overlap technique, a threshold-whitening technique and an adaptive detection threshold are adopted to effectively reduce the signal power loss. The performance of implemented NIEF is evaluated using real signals obtained by 12 bit GPS signal acquisition board. The output of NIEF is fed into the Software Defined Receiver to evaluate the acquisition and tracking performance. Experimental results shows that many types of interference such as single-tone CWI, AM, FM, swept CWI and multi-tones CWI are effectively mitigated with small signal power loss.

• Archives of Craniofacial Surgery
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• v.14 no.1
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• pp.16-23
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• 2013

Background: Even though degrees of deformation of microform cleft lip are not high, it has to be corrected with various procedures upon conditions and areas since it has various expressions. Many studies have focused on the classifications and procedures, but there are only a few studies on how much these procedures are performed in the actual field. This study aims to analyze the utilization of various procedures upon major correction points. Methods: A total of 52 patients who had been corrected by one surgeon from 1995 to 2011 were enrolled as subjects. Based on the medical records, it was checked whether the incision was made or not along with the correction procedures for alar base and philtral column, Cupid's bow, and vermillion free margin. Results: In case of an incision, full incision (42 times) was conducted most frequently. For alar base and philtral column, muscle re-approximation (25 times) was performed most frequently. However, recently, it was shown that excision on only the affected area and correction with dermis were more likely to be used. For Cupid's bow and vermilion free margin, elliptical excision on the only affected area followed by re-approximation was performed most frequently for 46 times (Cupid's bow) and 44 times (vermilion free margin), respectively. Conclusion: For the correction of microform cleft lip, less invasive procedures are preferred. However, in the actual field, if needed, aggressive procedures consisting of incisions have been conducted to correction. These trends are somewhat changed to utilization of a simple procedure, such as excision on the modified area, followed by a re-approximation rather than complicated procedures using the muscle.

• Archives of Craniofacial Surgery
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• v.17 no.3
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• pp.176-179
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• 2016

Primary cutaneous mucinous carcinoma (PCMC) is a rare low-grade malignant neoplasm derived from the eccrine glands. PCMC most commonly arises in the head and neck, with the eyelid being the most common site of origin. This case report describes a 51-year-old male with a painless, pigmented superficial nodular lesion over his right lower eyelid. The lesion was considered to be benign, and the initial treatment was simple excision with a 3-mm margin. However, histologic examination revealed the diagnosis of PCMC, and the patient underwent re-excision of the tumor site with an additional 3-mm margin from the initial scar. Histologic study of this second margin was free of any malignant cells. The patient experienced no postoperative complication or recurrence after 2 years. In our case, the skin lesion had benign morphologic findings and was strongly suspected to be a benign mass. Physicians should be aware of this tumor and be able to differentiate it from benign cystic or solid eyelid lesions.

• Archives of Reconstructive Microsurgery
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• v.23 no.1
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• pp.29-32
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• 2014

Few articles have been written about the flexor tendon sheath ganglion in the finger, especially, between A1 pulley and A2 pulley. We report on rare cases of flexor tendon sheath ganglion with one symptomatic and two asymptomatic. All masses were evaluated using real-time ultrasonography and well-defined anechoic cystic lesions with posterior enhancement were observed. A 17-year-old female had a small mass at the 4th metacarpophalageal joint of her right hand, with pain and triggering. The patient underwent simple excision and a ganglion measuring $1.0{\times}0.8$ cm in size was derived from Camper's chiasm, between A1 pulley and A2 pulley. In two asymptomatic cases, ganglia measuring less than 0.5 cm in size observed. Based on our experience, real-time ultrasonography would be an excellent diagnostic modality in determining the treatment method in flexor tendon sheath ganglia, and surgical excision is recommended in symptomatic, especially triggering patients.