Yazar "Kulahci, Y." seçeneğine göre listele

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    Distant muscular (rectus femoris) metastasis from laryngeal squamous cell carcinoma
    (Cambridge Univ Press, 2009) Kulahci, Y.; Zor, F.; Onguru, O.; Bozkurt, M.; Duman, H.
    Objective: We report an extremely rare case of distant metastasis to the rectus femoris muscle from a laryngeal squamous cell carcinoma. Method: We present a case report and a review of the world literature concerning distant skeletal muscle metastasis from head and neck squamous cell carcinoma. Results: The patient showed no evidence of distant muscular recurrence at follow up after 21 months; however, two years later he died from brain and suprarenal metastases. Conclusion: This report describes the first case of haematogenous distant metastasis to the left rectus femoris muscle from a laryngeal squamous cell carcinoma, without evidence of cervical lymph node metastases. To the best of our knowledge, this is the second reported case of muscular distant metastasis without cervical lymph node involvement. Although the prognosis associated with skeletal muscle metastasis is considered to be poor, surgical excision may be indicated for an isolated muscular metastasis.
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    The Effect of External Beam Irradiation Timing on Skin Graft Survival
    (Karger, 2010) Kulahci, Y.; Duman, H.; Zor, F.; Bozkurt, M.; Guden, M.; Gunhan, O.; Celasun, B.
    Background: The purpose of this study was to evaluate skin graft integrity after external beam irradiation in a rat model. Methods: Forty-eight male Wistar rats were randomly assigned to 8 groups (A, B, C, D, A(c), B-c, C-c and D-c). A rectangular full-thickness skin graft was raised and reapplied to its original bed on the dorsum of each rat. Groups A(c), B-c, C-c and D-c were the control groups and were not given postoperative irradiation. After grafting, 25 Gy unfractioned cobalt(60) irradiation was administered to groups A, B, C and D on postoperative days 10, 20, 30 and 40, respectively. Histological samples were obtained 8 weeks after grafting. Dermal and epidermal thickness were measured by the KS-400 image analysis program. Results: The difference in the epidermal and/or dermal thickness between the irradiated groups was not found to be significant. Furthermore, when histological features and the image analysis of the irradiated groups were compared with each other, there were no significant differences between the groups. Conclusions: Although we are aware that experimental results may not directly translate to the clinical setting, the present study indicates that external radiotherapy can be performed to skin-grafted areas as early as 10 days postoperatively. Copyright (C) 2010 S. Karger AG, Basel
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    Effects of timing in the applications of radiotherapy after transverse rectus abdominis musculocutaneous flap in rats
    (Ijrr-Iranian Journal Radiation Res, 2022) Binicier, O.; Caskan, P. K.; Kapi, E.; Bozkurt, M.; Zincircioglu, S. B.; Kulahci, Y.; Selcuk, C. T.
    Background: The present study aimed to investigate flap status in relation to the timing of radiotherapy (RT) in an experimental rat model of irradiated transverse rectus abdominis musculocutaneous (TRAM) flap. Materials and Methods: Fifty-six adult male Sprague-Dawley experiments were separated in seven groups in terms of flap surgery and RT. The groups comprised sham group, control (Ctrl) group, RT group, and RT plus surgery (RT+Surg) group, which was further separated in four groups depending on the timing of postoperative RT as RT+Surg-10 (RT on postoperative 10th day), RT+Surg-20 (RT on postoperative 20th day), RT+Surg-30 (RT on postoperative 30th day), and RT+Surg-40 (RT on postoperative 40th day). All the rats were sacrificed 8 weeks after the RT administration for histopathological analysis. Results: Compared with the RT+Surg-10 and RT+Surg-20 groups, the hyalinization and collagenization scores in RT+Surg-30 were determined to be significantly lower. Fibrosis scores were lower in the RT+Surg-30 group compared with the RT+Surg-20 group, whereas significantly lower inflammation scores were determined in the RT + Surg-40 group and significantly higher dermal thickness in the RT+Surg-30 group compared with the RT+Surg-10 group. Conclusions: The findings from this model of irradiated flap revealed the significance of the time lag among flap application and postoperative RT for histopathological outcome, emphasized the potential role of at least a 30- to 40day interval between surgery and RT in achieving more favorable flap status.