Wai Ming Tsang

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We describe the first reported case of tracheal necrosis following a thyroidectomy. This complication resulted in massive subcutaneous emphysema and pneumomediastinum, which required emergency exploration of the neck to decompress the trapped air. We also discuss the suggested etiology and management of this rare condition.
One hundred and four patients with anterior open bite (AOB) were subdivided by statistical means into three distinctly separate groups with AOB of different severity based on the extent of separation of the incisors in the vertical plane. Cephalometric evaluation of all subjects was completed using 24 skeletal and 12 dentoalveolar measurements, and the(More)
The linoleate level in total lipids was measured in lymphocytes from control subjects and patients with multiple sclerosis. A small but significant decrease was found in cases of multiple sclerosis. The percentage composition of lymphocyte fatty acids was determined in rats fed diets with various linoleate contents. There was a correlation between(More)
Lymphocytes were incubated with various long chain fatty acids bound to albumin. Incubation for 20 h with unsaturated fatty acids resulted in uptake into the neutral lipids and phospholipids. The addition of concanavalin A enhanced the uptake. With the unsaturated fatty acids the rotational relaxation time of 1,6-diphenyl-1,3,5-hexatriene (DPH) was(More)
The purpose of this paper is to study the efficacy of applying stereotactic navigation guidance to nasopharyngectomy via a minimally invasive transnasal approach as compared with the conventional open transfacial approaches. The nasopharynx is the centre of the anterior skull base, which is remote from the surface of the facial skeleton. It is well known(More)
BACKGROUND The present article aims to study the pattern and need of Intensive Care Unit admission after major head and neck operations. METHODS A retrospective study was undertaken of the hospital records of patients who underwent major head and neck operations during the period from February 1997 to February 2000 at the Division of Head and Neck(More)
The cephalometric characteristics of skeletal anterior open bite (AOB) in a southern Chinese population were evaluated in a group of 104 subjects with AOB and were compared with a control group of 40 subjects without AOB. The anteroposterior jaw relationship in the AOB group was Class I in 43%, Class II in 14%, and Class III in 43%. Cephalometric analysis(More)
Mucoepidermoid carcinoma is one of the most common of the salivary gland neoplasms. Histologically, it is classified as either a low-, intermediate-, or high-grade tumor, and there are significant differences in prognosis among the different grades. Patients with low-grade disease have an excellent chance of survival. High-grade tumors behave aggressively,(More)
Cowden's disease is a hereditary disorder characterized by oropharyngeal fibrosis and multiple hamartomas with potential malignant changes. We treated a 47-year-old man who had fibrotic lesions on the left vocal fold and an extensive amount of papillomatous lesions on the mucosa of the lips, tongue, and pharyngeal wall and on the skin of the axillae and(More)