Time filter

Source Type

Seoul, South Korea

Dhong E.-S.,Korea University | Kim Y.-J.,Korea University | Suh M.K.,Plastic Surgery Center
Archives of Plastic Surgery | Year: 2013

Background Nasal tip support is an essential consideration for rhinoplasty in East Asians. There are many techniques to improve tip projection, and among them, the columellar strut is the most popular technique. However, the conventional design is less supportive for rotating the tip. The amount of harvestable septal cartilage is relatively small in East Asians. For an optimal outcome, we propose an L-shaped design for applying the columellar strut. Methods To evaluate the anthropometric outcomes, the change in nasal tip projection and the columella-labial angle were analyzed by comparing preoperative and postoperative photographs. The anthropometric study group consisted of 25 patients who underwent the same operative technique of an L-shaped strut graft using septal cartilage and were followed up for more than 9 months. Results There were statistically significant differences between the preoperative and postoperative values in the nasal tip projection ratio and columella-labial angle. We did not observe any complications directly related to the L-shaped columellar strut in the anthropometric study group. Conclusions The L-shaped columellar strut has advantages not only in the controlling of tip projection and rotation, but in that it needs a smaller amount of cartilage compared to the conventional septal extension graft. It can therefore be an alternative technique for nasal tip plasty when there is an insufficient amount of harvestable septal cartilage. © 2013 The Korean Society of Plastic and Reconstructive Surgeons. Source

Madi L.,Tel Aviv University | Rosenberg-Haggen B.,Plastic Surgery Center | Nyska A.,Tel Aviv University | Korenstein R.,Tel Aviv University
Experimental Dermatology | Year: 2013

A3 adenosine receptor, A3AR, belongs to the Gi proteins coupled receptors. Activation of A3AR by its agonist, IB-MECA, decreases cAMP and was expected to reduce melanin level. Unexpectedly, B16 melanoma cells exposed to IB-MECA increased melanin levels in a dose-dependent manner. Human skin explants exposed to IB-MECA showed an increase in DOPA positive cells and in melanin deposition in keratinocytes. The agonist induced AKT phosphorylation, leading to a rapid translocation of the transcription factor MiTF towards the nucleus. DOPA oxidase activity and melanin levels induced by IB-MECA were further enhanced by PD98509, an inhibitor ERK signalling pathway. Our study shows that IB-MECA decreases cAMP while inducing melanogenesis. The proposed mechanism involves activation of PI3K/AKT signalling pathway by β/γ subunits of the G protein coupled to A3AR. The increase in melanin level in human skin explants suggests that IB-MECA may be a potential candidate to the treatment of hypopigmentation of skin. © 2013 John Wiley & Sons A/S. Source

Hirsch H.J.,Shaare Zedek Medical Center | Lahlou N.,Center Hospitalier University Cochin Saint Vincent Of Paul | Gillis D.,Hadassah University Hospital | Strich D.,Specialty Pediatric Clinics | And 5 more authors.
Journal of Clinical Endocrinology and Metabolism | Year: 2010

Background: Gonadotropin free α-subunit (FAS) levels paradoxically increase during GnRH agonist (GnRHa) treatment of central precocious puberty (CPP). The histrelin implant suppresses gonadotropins and estradiol (E 2) levels for 1 yr, but effects on FAS have not been described. Objectives: We aimed to determine whether FAS levels remain elevated during treatment with the implant, to assess the dynamics of FAS after removal, and to ascertain the reliability of FAS for monitoring gonadotropin secretion. Methods: Ten girls with CPP were studied. In eight, monthly im GnRHa preparations were given until implant insertion. Two naive girls did not receive prior GnRHa. Duration of implant treatment ranged from 18-63 months with repeated implant removals and insertions of new implants. LH, FSH, E2, and FAS were measured before implant insertion in the two naive patients and during treatment, and in all girls before and after implant removal. Results: FAS levels were 0.2 and 0.4 ng/ml (normal, <0.6 ng/ml) in the two naive girls and increased to 2.4 and 5.1 ng/ml within 2-5 d of insertion. FAS level (mean ± SD) in all 10 girls during histrelin implant treatment was 1.19 ± 0.49 ng/ml and rapidly decreased to 0.31 ± 0.12 ng/ml within 1 wk of implant removal (P < 0.03). In contrast, significant increases in LH (P < 0.05) and FSH (P < 0.02) were observed at 3 wk and E2 (P < 0.05) at 6 wk after implant removal. Conclusions: Compared to LH, FSH, and E2, FAS responds more rapidly to implant removal and represents the most sensitive indicator of gonadotropin recovery after histrelin implant treatment. Copyright © 2010 by The Endocrine Society. Source

Woo J.S.,Plastic Surgery Center
Journal of Craniofacial Surgery | Year: 2015

BACKGROUND:: There are many techniques for correcting short nose deformities and the septal extension graft is the most commonly performed technique among Asians. In many Asian patients septal cartilage, however, is too small and insufficient to perform an effective septal extension graft. Therefore, we designed a novel technique, named hybrid septal extension graft to overcome this pitfall in Asian tip plasty. METHODS:: From February 2010 to March 2013, 41 patients with primary (N?=?30) or secondary (N?=?11) short nose deformity underwent a hybrid septal extension graft. The hybrid septal extension graft is a modified septal extension graft which uses the small septal cartilage along with irradiated homologous costal cartilage. Irradiated homologous costal cartilage was carved into a shape of a thin batten and securely fixed bilaterally to the caudal septum. Harvested septal cartilage was located between the 2 irradiated homologous costal cartilage batten grafts and fixed with sutures. Then, the alar cartilage was fixed at the end of the septal cartilage graft. The nasal lengths, nasal tip projections, and nasolabial angles were measured pre- and postoperatively. RESULTS:: The hybrid septal extension graft showed enough nose lengthening and a decreased nostril show, even in cases with a very small septal cartilage. CONCLUSIONS:: The authors present a novel technique for correction of short nose deformity in Asians. The hybrid septal extension graft provides good results with minimal complications and overall patient satisfaction was very high. © 2015 by Mutaz B. Habal, MD. Source

Zeidler K.R.,Aesthetic and Plastic and Reconstructive Surgery | Berkowitz R.L.,Aesthetic and Plastic and Reconstructive Surgery | Chun Y.S.,Harvard University | Alizadeh K.,Long Island Plastic Surgery Group | And 7 more authors.
Annals of Plastic Surgery | Year: 2014

Background: Prosthetic reconstruction of the breast, as a 2-staged procedure using tissue expanders followed by placement of permanent implants, offers favorable aesthetic results with minimal additional surgical intervention. However, the current outpatient process to fill saline expanders can be lengthy and onerous, involving months of office visits and discomfort from the bolus saline expansions. We present a new technology (AeroForm Tissue Expansion System), which has the potential to improve the process of breast tissue expansion by providing a method for low-volume incremental filling, eliminating the need for injections and directly involving the patient by allowing her some control over the expansion process. Methods: The described study is a 2:1 randomized controlled trial of the investigational CO2 expansion system and saline expanders. Of the 82 women receiving expanders, 58 (39 bilateral and 19 unilateral; bilateral rate, 67%) were implanted with CO2 tissue expanders and 24 subjects (15 bilateral and 9 unilateral; bilateral rate, 63%) were implanted with saline expanders. Results: Preliminary validated expansion results were available for 55 women. Available mean time for active expansion in the CO2 group was 18.2 (9.2) days (median, 14.0; range, 5-39; number of expanders, 53), which was less than the mean time for active expansion in the saline group: 57.4 (33.6) days (median, 55; range, 5-137; number of expanders, 33). Available mean time from implant placement to exchange for a permanent prosthesis in the CO2 group was shorter [106.3 (42.9) days; median, 99; range, 42-237; number of expanders, 53] than for the women in the control group [151.7 (62.6) days; median, 140; range, 69-433; number of expanders, 33]. After 2 events-underexpansion (n = 1) and erosion (n = 1)-in the CO2 group, the internal membrane was redesigned and the expander bulk was decreased to minimize the risk of underexpansion and erosion in subsequent patients. Conclusions: Preliminary evidence indicates that the CO2-based tissue expansion system performs the same function as saline expansion devices without significantly altering the risk to the patient and that the device has the potential to make the expansion process faster and more convenient for both the patient and the physician. © 2014 by Lippincott Williams & Wilkins. Source

Discover hidden collaborations