ABSTRACT
Reconstruction of the nose and scalp after resection of cutaneous malignancy can be challenging, and can involve multiple stage surgery and cause secondary scarring in adjacent facial areas. The author describes his experience of a series of 100 composite full thickness skin and fat grafts in the head and neck region using the neck as the donor site. The technique was used to reconstruct the nose (n=48) and scalp including temple and forehead (n=46), and at 6 other sites, mainly the cheek or lower eyelid. Defects ranged in size from 11 to 36mm and the thickness of fat varied from 1 to 5mm. One flap failed, one patient had necrosis of roughly 30% of the graft, which did not require surgical intervention, and one patient had early defatting of a prominent graft. The author outlines the technique used and the complications, and discusses the benefits and limitations of the technique, which, he believes, has a role in carefully selected patients.
Subject(s)
Head and Neck Neoplasms/surgery , Nose/surgery , Plastic Surgery Procedures/methods , Scalp/surgery , Skin Transplantation/methods , HumansABSTRACT
Juvenile ossifying fibroma (JOF) is an uncommon fibro-osseous lesion occurring in the facial bones. It has been recognised as a separate histopathological entity among the fibro-osseous group of lesions. Fibro-osseous lesions of the craniofacial bones are difficult to classify and treat however a common factor to all is the conversion of the bone to benign fibrous tissue with a varying degree of mineralised tissue. This case describes a 15 year old patient with a juvenile aggressive ossifying fibroma (JAOF) and an estimate of the rate of growth of such a rare lesion.
Subject(s)
Fibroma, Ossifying/pathology , Mandibular Neoplasms/pathology , Adolescent , Biopsy , Fibroma, Ossifying/physiopathology , Follow-Up Studies , Humans , Image Processing, Computer-Assisted/methods , Imaging, Three-Dimensional/methods , Male , Mandibular Neoplasms/physiopathology , Radiography, Panoramic , Tomography, X-Ray Computed/methods , Treatment RefusalABSTRACT
Scattering parameter expressions are developed for the principal mode of a coaxial air line. The model allows for skin-effect loss and dimensional variations in the inner and outer conductors. Small deviations from conductor circular cross sections are conformally mapped by the Bergman kernel technique. Numerical results are illustrated for a 7 mm air line. An error analysis reveals that the accuracy of the scattering parameters is limited primarily by the conductor radii measurement precision.
ABSTRACT
[This corrects the article on p. 117 in vol. 94.].
