Quantitative relationship between vascular kinking and twisting.

A wide variety of factors causing vascular thrombosis in the microvascular free flap reconstruction have been encountered. The most frequent situation in our experiences has been vascular kinking because of improper positioning. It has been reported that the best way to avoid kinking is to place the vessels at a neutral axis. However, curving the pedicles to match the recipient vessels cannot be avoided, especially in head and neck reconstruction with a large flap and long pedicle. According to our clinical experiences, the curved vascular pedicle needs rotation in its axis from the neutral position to avoid kinking. Furthermore, we noted that the number of loops equals the number of axial rotations of 360°. We propose that these experiences and ideas can have wide applications in various fields of vascular surgery.

Various modifications to internal mammary vessel anastomosis in breast reconstruction with deep inferior epigastric perforator flap.

Free autologous tissue transfer has been used in mastectomized patients for high-quality reconstruction. Since the deep inferior epigastric perforator flap was developed, it has been considered preferable owing to reduced donor site morbidity. At our institution, anastomosis of internal mammary vessels has been top priority because of better positioning and shorter pedicle length. We publish our experiences with various technical modifications that assure internal mammary vessel anastomosis. From 2003 to 2008, 35 patients received free deep inferior epigastric perforator flap for breast reconstruction by anastomosis with internal mammary vessels. Twenty-nine reconstructions were done immediately upon mastectomy whereas six were delayed. The patterns of anastomosis between the flap pedicle and internal mammary vessel were categorized and the results were followed by flap survival and complications. These deep inferior epigastric perforator flaps were all supplied by a single pedicle artery. Twenty-five of them were drained by a single pedicle vein, and the venous anastomosis pattern was end to end to the single internal mammary vein (IMV) (type I, N = 25). However, the other nine flaps were drained by one pedicle vein anastomosed end to end to double IMV (type II, N = 2), end to end to both proximal and distal ends of single IMV (type III, N = 5), end to end and end to side to single IMV (type IV, N = 2), and end to end to single IMV without anastomosing the other (type V, N = 1). All flaps were successful, except in one patient with type I anastomosis who received vascular reexploration due to pedicle twisting. Another patient with type I anastomosis needed revision due to partial fat necrosis of the flap. No other complications were found. Various modifications of internal mammary vessel anastomosis can be used to ensure the safety of deep inferior epigastric perforator flap in breast reconstruction.

Myectomy and botulinum toxin for paralysis of the marginal mandibular branch of the facial nerve: a series of 76 cases.

BACKGROUND: Paralysis of the marginal mandibular branch of the facial nerve is frequently seen in patients with oromandibular reconstructions or facial palsy. However, deformities caused by overpulling of the depressor muscles of the contralateral lower lip without being antagonized by the diseased counterpart is often quite conspicuous. Depressor myectomy of the contralateral lower lip therefore provides a method for correcting the dynamic deformity. METHODS: Seventy-six patients with paralysis of the marginal mandibular branch of the facial nerve were treated with either surgical depressor myectomy of the lower lip (25 patients), depressor myectomy with subsequent botulinum toxin injection (eight patients), or only chemical depressor myectomy with botulinum toxin injections (43 patients). RESULTS: Good to fair results were always achieved, with near balance of the lower lip during mouth opening and in facial expressions. Surgical myectomy may still result in recurrence in eight patients (24 percent), which will necessitate further treatment with botulinum toxin injections. CONCLUSIONS: Using myectomy for paralysis of the marginal mandibular branch of the facial nerve can be an effective treatment for this significant deformity. Chemical myectomy with botulinum toxin injection is a safe and convenient mode of treatment; however, the disadvantage is that it needs repeated injections and costs more.

Treatment of mediastinal immature teratoma in a child with precocious puberty and Klinefelter's syndrome.

Teratoma is the most common germ cell tumor, which can be divided into the mature and the immature histologically. Concurrent Klinefelter's syndrome may be overlooked in a patient with a germ cell tumor. This is because the tumor that secrets alpha-fetoprotein and beta human chorionic gonadotropin can mimic puberty in a patient with Klinefelter's syndrome, masking the usual clinical signs. In reviewing the literature on the subject, the role of neoadjuvant and adjuvant chemotherapy remains ill-defined for the immature teratoma. Age-dependent prognosis seems to demonstrate that children with immature teratomas have a better outcome. We share the experience of treating a child with immature teratoma with surgical excision alone, and it ended in a local recurrence.