Histological Features and Tissue Microarray Taxonomy of Nigerian Breast Cancer Reveal Predominance of the High-Grade Triple-Negative Phenotype

INTRODUCTION

Little is known about the biology, molecular profile and hence optimal treatment of African Nigerian breast cancer. The aim of this work, therefore, was to characterize the histology and molecular profile of Nigerian breast cancer.

METHODS

Breast carcinomas from women at 6 centres of similar tribal origin in Nigeria were reviewed and assembled into tissue microarrays (TMAs), and sections were stained for hormone receptors, i.e. estrogen receptor (ER)α, ERβ1, ERβ progesterone receptor (PR) and androgen receptor, cyclin D, HER2, Ki67 and cytokeratins (CKs), i.e. CK5/6 and CK14 (basal) and CK18 and 19 (luminal).

RESULTS

A total of 835 tumours were analysed. The mean age at diagnosis was 48.62 ± 12.41 years. The most common histological subtype was ductal NST (no-special-type) carcinoma (87.3%). Over 90% of the tumours were grade 2 or 3. The predominant molecular phenotype was the non-basal, triple-negative type (47.65%) followed by the HER2-positive group (19.6%). The percentage of ER-, PR- and HER2-positive tumours was 22.4, 18.9 and 18.8%, respectively.

CONCLUSION

Nigerian breast cancer predominantly has a high-grade, triple-negative profile. It occurs at a younger age and bears similarities at the molecular level to pre-menopausal breast cancer in white women, with remarkably lower levels of ERβ expression. The early presentation and histological and molecular phenotype may explain the poor prognosis, and tailoring treatment strategies to target this unique profile are required.

Hygiene Practices among Workers in Local Eateries of Orolu Community in South Western Nigeria

Background:

Activities of local food premises and monitoring of food handlers are usually not regulated.

Aim:

The objective of this study was to determine food hygiene (FH) practices among food handlers in rural communities in South Western Nigeria.

Subjects and Methods:

Descriptive cross-sectional study was carried out among 235 food handlers; data collection was by interviewer administered questionnaires. Using the SPSS software, multivariate analysis in two separate models was done to explore the predictors of correct knowledge and good hygiene practices. The model fit was assessed as good using the Hosmer and Lemeshow test.

Results:

Mean age of respondents was 31.8 (10.8) years. Of the respondents (134) that had training, 17.2% (23/134) had formal training, and 82.8% (111/134) had apprenticeship; about 31.5% (74/235) of respondents maintained a good level of hygiene in their practices. Significant predictors of correct knowledge were found to be being trained (significant 0.01, odds ratio [OR] 2.4, 95% confidence interval [CI] 1.2–4.8) and receiving the training as an apprentice (significant 0.01, OR – referent group); or in a formal setting (significant 0.01, OR 3.3, 95% CI 1.6–7.0) and having no formal education (significant 0.04, OR – reference group).

Conclusion:

Good knowledge and attitude but low level of good practices toward FH characterized food handlers under study.

Prevalence and Predictors of Erectile Dysfunctions among Men on Antiretroviral Therapy in South-western Nigeria

Background:

Erectile dysfunctions (EDs) are common presentations among men on anti-retroviral therapy, many of who had a course to discontinue anti-retroviral drugs or search for alternative treatments.

Aim:

This study assessed the prevalence and predictors of ED among men on anti-retro viral therapies (ART) in a Nigerian population.

Subjects and Methods:

It was a descriptive cross-sectional survey among 234 HIV-positive men on anti-retroviral therapy selected using stratified sampling method after excluding for co-morbidities. Research instrument was semi-structured interviewer administered questionnaire, and data were analyzed using the SPSS software version 17.0 (Chicago IL, USA), while binary logistic regression and Chi-square test were used to demonstrate association between selected categorical variable.

Results:

Mean age of respondents was 37.1 (1.6) years, 85.6% have not missed their medications, self-reported adherence was reported as good among 213 [(90.8%) 213/234], though calculated adherence was 90% among as many as 201 [(85.6%) 201/234]. Pattern of EDs revealed weak erection among 42 [(37.8%) 42/111], 15 [(13.5%) 15/111] said they could no longer achieve erection, 33 [(29.7%) 33/111] said they could not maintain erections, while 27 [(24.3%) 27/111] presented with loss of libido. Delayed and premature ejaculations were reported among 24 [(21.6%) 24/111] and 8 [(7.2%) 8/111] respectively. About 14% (33/234) of respondents said that anti-retroviral drugs could have caused their ED while 78% (183/234) said it should not. A statistically significant association exists between having weak erections and age above 65 years and calculated the adherence <95%, while none exists between having weak erections and missing pills.

Conclusion:

Anti-retroviral drugs are common causes of EDs. Concerns of clients should always be addressed most especially issues that may compromise adherence.

Prevalence of erectile dysfunction (ED) and its risk factors among adult men in a Nigerian community

AIMS AND OBJECTIVES

This study assesses the prevalence of erectile dysfunction as well as its risk factors.

MATERIALS AND METHODS

This is a descriptive cross-sectional study among 650 adult males, aged between 18 and 70 years selected by multi-stage sampling technique. Data were obtained from respondents selected from 4 wards in Olorunda local government area of Osogbo in Osun state, Southwest, Nigeria, using pre-tested semi-structured questionnaires.

RESULTS

Majority of the respondents were between ages 20-29 years with mean age of 33.6 ± 13.4 years. Most of the respondents [547(91.2%)] were aware of ED and 63.4% of them said it can be treated. The prevalence of ED was 43.8% and factors such as increasing age (p=0.00), hypertension (p=0.000), diabetes mellitus (p=0.000), perineal surgery (p=0.000), alcohol consumption (p=0.000), and smoking (p=0.000) were found to be significantly associated with developing ED.

CONCLUSION AND RECOMMENDATION

The level of awareness about erectile dysfunction was high among respondents and the prevalence from this study was 43.8%. Factors associated with ED from this study included increasing age, alcohol consumption, hypertension, perineal injury and surgery. Hence, the risk of developing ED can be significantly reduced by educating men about life style modifications such as reduction in alcohol intake and smoking, as well as regular exercises.