Cheuk Wai Choi

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PURPOSE To study and report the clinical outcomes and patterns of failure after intensity-modulated radiotherapy (IMRT) for nasopharyngeal carcinoma (NPC). METHODS AND MATERIALS The treatment outcomes of NPC patients treated with IMRT at Pamela Youde Nethersole Eastern Hospital between 2005 and 2007 were reviewed. The location and extent of locoregional(More)
PURPOSE To assess the reduction of tumor bulk and improvement of tumor control probability (TCP) by using induction chemotherapy for advanced nasopharyngeal carcinoma (NPC). MATERIALS AND METHODS From February to December 2005, 20 patients with Stage III-IVB NPC were treated with induction-concurrent chemotherapy and intensity-modulated radiotherapy with(More)
PURPOSE To retrospectively analyze the prognostic value of parapharyngeal space (PPS) extension after conformal radiotherapy for nasopharyngeal carcinoma. PATIENTS AND METHODS Between 1998 and 2005, 700 patients were treated with conformal radiotherapy at 2 Gy/fraction daily to a total of 70 Gy. All patients underwent staging with magnetic resonance(More)
We undertook a large retrospective study to evaluate the impact of screening family members of NPC patients with Epstein Barr Virus (EBV) serology. 1,199 asymptomatic family members of NPC patients were entered into the annual screening program with EBV serology and nasopharyngoscopy between 1994 and 2005. Eighteen participants of our screening program(More)
PURPOSE To analyze the expression of excision repair cross-complementation group 1 (ERCC1) protein in predicting the clinical outcome of nasopharyngeal carcinoma (NPC). METHODS AND MATERIALS The histologic specimens of 258 patients with Stage III to IVB nonkeratinizing NPC who were treated with radiotherapy alone (Group I) or concurrent-adjuvant(More)
The pathogenetic mechanism of nasopharyngeal carcinoma (NPC) is still unclear. Its familial aggregation, on the other hand, has been well documented by many epidemiological studies. The objective of this study was to evaluate the clinical characteristics of familial NPC in an endemic region. Between March 1994 and November 2005, 1,202 consecutive patients(More)
Treatment of nasopharyngeal carcinoma (NPC) can be improved by early detection of the disease as treatment outcome worsens with disease’s progression. This can be achieved with a mass screening program using Epstein Barr virus (EBV) serology and nasopharyngoscopy. The efficacy of any screening strategy should be evaluated before putting it into practice.(More)
BACKGROUND We would like to investigate the if IMRT produced better target coverage and dose sparing to adjacent normal structures as compared with 3-dimensional conformal radiotherapy (3DCRT) and lateral opposing fields (LOF) for patients with Graves' ophthalmopathy treated with retro-orbital irradiation. METHODS Ten consecutive patients diagnosed with(More)
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