Biomedical subjects

M Fung Kee Fung

Publications and source records attributed to M Fung Kee Fung.

3 recordsLinked to original sources

PubMed1997

Classification of 1H MR spectra of biopsies from untreated and recurrent ovarian cancer using linear discriminant analysis.

Proton (1H) magnetic resonance (MR) spectra of ex vivo biopsy samples of ovarian cancers provided biochemical information that was used to discriminate cancer from normal ovarian tissue. Possible differences present in intrinsically resistant tumors or changes in biochemistry after the induction of resistance were identified. Using multivariate techniques, in particular linear discriminant analysis (LDA), ovarian cancer was distinguished from normal ovarian tissue with a sensitivity of 100%, a specificity of 95% and an accuracy of 98%. Moreover, LDA was able to distinguish untreated ovarian cancer from recurrent ovarian cancer with a sensitivity of 92%, a specificity of 100%, and an accuracy of 97%; removal of the single "fuzzy" specimen increased the accuracy to 100%. Applications of this knowledge to in vivo measurements could lead to noninvasive diagnosis of ovarian cancer.

Biopsy↗

PubMed1997

Comparison of Fourier-transform infrared spectroscopic screening of exfoliated cervical cells with standard Papanicolaou screening.

To compare Fourier-transform infrared (FTIR) spectroscopy in screening cervical cytology and standard Papanicolaou (Pap) screening with colposcopic directed biopsy as a "gold standard," we prospectively gathered FTIR samples and Pap smears of all patients attending our program's colposcopy clinics, from February to October 1995. We recorded demographic data for each patient including colposcopy, cytology, treatment follow-up, and histology. Using the colposcopically directed biopsy as the gold standard, exfoliated cervical cells from 301 patients were collected to compare cytology and FTIR spectroscopy. Based on previously established criteria, we provided distinctive definitions of both negative/positive FTIR, cytology, and histology. Results of 301 cases showed 196 positive and 105 negative cytologies. The sensitivity, specificity, false-negative rate, and false-positive rate for the Pap test were 86.6, 90.5, 13.4, and 9.5%, respectively. However, FTIR results versus histology showed 215 positive and 86 negative with a sensitivity of 98.6% and specificity of 98.8%. False-negative and false-positive rates were 1.4 and 1.2%, respectively. In the 12 cervical cancers there were no false-negative FTIR results but 3 false-negative Pap smears. The positive and negative predictive values for FTIR were 99.5 and 96.5% while the Pap values were 95.9 and 72.3%. Compared to standard Pap smears, FTIR has a better false-negative rate and negative predictive value in this preliminary study. Further work, to establish the range of each of the spectral criteria for different grades of dysplasia and that among various infectious effects, needs to be conducted before applying this research tool to a population-based study.

Biopsy↗

PubMed1997

Does persistent postmenopausal bleeding justify hysterectomy?

Postmenopausal vaginal bleeding is an early sign of endometrial cancer. persistent postmenopausal bleeding refers to uterine bleeding for which no malignant cause can be demonstrated by endometrial sampling. Hysterectomy has routinely been performed in this group of patients because of a perceived risk of endometrial cancer. The objective of this study was to quantify the risk of endometrial cancer in patients undergoing hysterectomy for postmenopausal bleeding after benign histology on endometrial sampling. One thousand four hundred and sixty-three patients underwent a hysterectomy during the study period. Forty hysterectomies (2.7%) were performed for persistent postmenopausal bleeding. The final pathology of the 40 hysterectomy specimens demonstrated hyperplasia with atypia in four patients (10%), hyperplasia without atypia in 14 (35%), and other non malignant pathology in 22 (55%). There were no cases of carcinoma of the endometrium. We conclude that persistent postmenopausal bleeding with non malignant pathology on endometrial sampling is not an indication for hysterectomy.

Aged↗