• Archives of Plastic Surgery
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• v.51 no.6
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• pp.575-580
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• 2024

Carcinoma cuniculatum is a variant of squamous cell carcinoma, characterized by a slow growth with progressive crypt-like invasion of deep tissue. This tumor is frequently misdiagnosed as a benign skin lesion both clinically and histopathologically. The final diagnosis is often delayed as it requires a large sample biopsy. We report the case of a 67-year-old patient who presented to us with a recurring chronic ulcer over a surgical scar of 5 years of evolution. Only after a wide resection of the chronic ulcer was it possible to achieve the correct diagnosis of this large and poorly evolving carcinoma. The subsequent reconstruction with a musculocutaneous gracilis free flap allowed the patient to walk again.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2003.10a
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• pp.21-24
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• 2003

In hot forming process of the backward end-bulkhead of a pressure hull, the blank diameter and the tool clearance are the critical factors which influence wrinkling defect, forming load and shape completeness of the product. Two F.E.A softwares with the elasto-plastic material model and rigid plastic model were utilized to predict the occurrence of wrinkling defect. Tool clearance was determined by considering the increase of blank thickness, die strength and the stretching effect. Heat treatment condition after the hot forming to recover the original properties of the material was estabilished by specimen-based heat treating experiment.

• Archives of Reconstructive Microsurgery
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• v.23 no.1
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• pp.21-24
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• 2014

Bronchopleural fistula is an unnatural communication between the bronchial tree and pleural space. Closure of the bronchial stump using various muscular flaps has been previously reported. There have been few reports on treatment of large defects with bronchopleural fistula accompanied by surrounding muscle injury. We report on our experience with two patients suffering from large defect with bronchopleural fistula, who were treated with free flaps. No recurrence of bronchopleural fistula was observed during follow-up.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.37
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• pp.1.1-1.6
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• 2015

The restoration of extensive zygomatic complex defects is a surgical challenge owing to the difficulty of accurately restoring the normal anatomy, symmetry, proper facial projection and facial width. In the present study, an extensive post-traumatic zygomatic bone defect was reconstructed using a custom-made implant that was made with a selective laser melting (SLM) technique. The computer-designed implant had the proper geometry and fit perfectly into the defect without requiring any intraoperative adjustments. A one-year follow-up revealed a stable outcome with no complications.

• Journal of Trauma and Injury
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• v.31 no.2
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• pp.91-95
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• 2018

Managing large infected midline abdominal defects are clinically challenging and technically demanding. The alloplastic materials, regional flaps, and component separation are usually infeasible because of the size, location, depth, and state of the defects. In these cases, the free flap is the only option with a large well-vascularized tissue that is free to inset regardless of the location. Herein, we report a case of 44-year-old man with a large infected midline abdominal wall defect who was completely treated with a latissimus dorsi myocutaeous free flap followed by negative pressure wound therapy.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.16 no.2
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• pp.137-144
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• 1994

Inselecting scars for treatment, attention be paid not only to the features of the defect as seen objectively but also to the element of the defect most disturbing to the patient. We revised the scar tissues with simple elliptical excision, Z-plasty, modified Z-plasty, W-plasty and hand dermabrasion in varialbe pattern of scars and got the favorable results. The success rate of scar revision usually depends on the patient's subjective judgement. We must inform our patient the limitation of scar revision and importance of postoperative care. The oral and maxillofacial surgeons must resolve the variable scars which re involved in variable operations and traumas.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.25 no.8
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• pp.1213-1219
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• 2001

In this paper, modeling of the multi-pass roll forming process with the finite element method and defect prediction in roll forming process are presented. In the roll forming process, there occurs the defect of scratch. It appears on tubes because of the friction between the strip and the roll, the unexpected sliding velocity and the contact pressure when fabricating the tubes. The surface of the product will be not uniform due to the defect. The scratch can be predicted with the simulation modeling of the finite element method, and can be avoided by modifying the design.

• Archives of Craniofacial Surgery
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• v.10 no.1
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• pp.37-39
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• 2009

Purpose: Langerhans cell histiocytosis is a heterogenous group of Langerhans cell proliferative disorders and includes eosinophilic granuloma, Letterer-Siwe diseases, and Hand-Schuller Christian disease. We report a case of eosinophilic granuloma on frontal area. Methods: A 17-year-old male presented with swelling and tenderness on Lt. frontal and periorbital area. CT and MRI showed a $33{\times}25mm$ sized mass that involved Lt. frontal calvarium, frontotemporal meninges, and orbital roof. Results: Total excision of the mass and adjacent soft tissue, calvarium, and orbital roof was performed. Orbital roof defect was reconstructed with absorbable plate and calvarial defect was done with outer cortex of temporal bone flap. The histology revealed proliferation of histiocytes and eosinophils. Immunologically, these histiocytic cells expressed S-100 protein and CD1a. The patient is currently taking conservative treatment. Conclusion: The severity of these disease and their prognosis and treatments are various. For unifocal cranial Langerhans cell histiocytosis, complete excision is the treatment of choice. We report this case with review of literature.

• Transactions of Materials Processing
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• v.15 no.8 s.89
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• pp.550-555
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• 2006

In this study, effects of forming angle and friction coefficient on a initiation of the Mannesmann hole defect were analyzed by using a response surface method. The maximum effective plastic strain at center point of specimen is utilized for the prediction of the starting point of crack occurrence, which is suggested by the comparison of integrals of four different ductile fracture models between the histories of the effective plastic strain at center point. It was revealed that the principal stress at the center is the dominant element to the increase of the effective plastic strain. It was also verified by the simulation results from the comparison of experiment and simulation. It is provided that the forming angle of 25 degrees and the spreading angle of 1 degree can be a proper design condition without an occurrence of internal hole defect and an excessive slip.

• Archives of Reconstructive Microsurgery
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• v.11 no.2
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• pp.179-185
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• 2002

The wrist and forearm are a frequently damaged area in high tension electrical injury as an input or output of the current. Electrical burns affecting the wrist and forearm may produce full thickness necrosis of the skin and damage deep vital structures beneath the eschar, affecting the local tendons, nerves, even bones and joints which result in serious dysfunction of the hand. From January 1997 to December 2001, we had treated 20 patients with high tension electrical burn in the wrist and forearm using anterolateral thigh free flap. Average follow up period were 24 months and we get satisfactory results both in functional and aesthetic aspects. This flap is considered useful in one-stage reconstruction of wide and large soft tissue defect combined with arterial injuries.