Skeletal muscle is one of the most unusual metastaticsites for any malignancy. Duodenal cancer is extremelyrare, and no cases of skeletal muscle metastasis fromduodenal cancer have been reported. We report here ina case of metastasis to the skeletal muscle of the leftthigh from duodenal cancer. Our patient was a 47-year-oldman, exhibiting a painful mass in the posterior aspect ofhis left thigh over a 4 month period. An imaging study,and a biopsy, revealed a duodenal adenocarcinoma metastasizeto the skeletal muscle. The patient refusedchemotherapy and has followed up for 4 months.
(Cancer Rese Treat. 2002;34:394-396)
Digital watermark technology is now drawing attention
as a new method of protecting digital content from
unauthorized copying. This paper presents a novel audio
watermarking algorithm to protect against unauthorized
copying of digital audio. The proposed watermarking
scheme includes a psychoacoustic model of MPEG audio
coding to ensure that the watermarking does not affect the
quality of the original sound. After embe dding the
watermark, our scheme extracts copyright information
without access to the original signal by using a whitening
procedure for linear prediction filtering before correlation.
Experimental results show that our watermarking scheme
is robust against common signal processing attacks and it
introduces no audible distortion after watermark insertion.