Cancer In Zimbabwe Research Articles

Understanding female students’ risk perceptions of developing breast cancer at Great Zimbabwe University

This article focuses on breast cancer as the second most prevalent cancer in Zimbabwe. However, despite several local studies on breast cancer and its risk factors, the incidence rate of the disease in the country is increasing. This article sought to establish the level of awareness of the risk factors of breast cancer among female students. The study was carried out at Great Zimbabwe University, an institution of higher learning in Masvingo province, Zimbabwe. A mixed methods approach was employed involving a focus group discussion comprising eight key informants and online individual questionnaires with open and closed questions used to capture attitudes of female students towards breast cancer. Risk factors were categorised into age, family history, reproductive factors, oestrogen, and lifestyle. There were also some cultural beliefs like bewitchment and myths about black brassieres causing breast cancer. Thus, there is need for educative campaigns to disseminate breast cancer information, especially promoting regular screening and awareness of predisposing factors. Additionally, more regular and in-depth studies on breast cancer in Zimbabwe are imperative as our results show a higher prevalence rate than current official statistics. The research provides relevant information for pastoral caretakers handling trauma in the discipline of practical theology.Contribution: This article represents an intersection between practical theology and basic health care. Insights resulted from this study provide a baseline upon which to develop ways to reduce prevalence of breast cancer. The research can also be utilised by specialists in pastoral care and women theologies.

Risks of oesophageal cancer in Zimbabwe: Eating habits and indoor air pollution from firewood smoke

Background: Oesophageal cancer is among the top five (5) cancers in Zimbabwe, and it has a high mortality rate. Several studies have alluded to the association between exposure to firewood smoke and this cancer. This study assessed the association between firewood smoke exposure, consumption of hot beverages, and food with oesophageal cancer among cancer patients in Zimbabwe. Methods: This study was quantitative in nature and adopted a cross-sectional design. A matched case-control approach with 95 pairs of cases and controls from Parirenyatwa Group of Hospitals' Radiotherapy Centre, a major referral hospital in Zimbabwe was used. A total of 190 participants were interviewed using a questionnaire administered via telephone by trained interviewers. Secondary data using histology results and radiology reports were obtained from the patient's medical records. SPSS version 27 was used to perform the descriptive analysis for variables such as age, marital status, exposure to firewood smoke, and thermal burns. Bivariate and multivariate analyses were used to examine the relationship between oesophageal cancer and dependent variables. Results: The ratio of male to female OC cases was 1.4 to 1, with a mean age of 63 for males and 60 years for females. The OC was significantly associated with the usage of firewood smoke as a major source of cooking energy (OR: 2.961; 95 % CI 1.46 - 6.03) (AOR: 4.22; 95% CI 1.22 - 14.59) with a p - value of 0.043. Also, the OC was significantly associated with high consumption of sweet potatoes (OR: 3.26; 95 % CI:1.67 - 6.55) (AOR: 3.47; 95% CI: 1.07 - 11.23) with a p - value of 0.001. The co-usage of the kitchen as a dining room was associated with OC (OR: 2.65; 95% CI: 1.44 - 4.88), no association was found (AOR: 0.98; 95% CI: 0.34 - 2.72) after adjusting for confounders. Risk factors such as age, alcohol intake, smoking, HIV status, and marital status were not associated with OC. Conclusion: The use of firewood for cooking and the consumption of sweet potatoes are the major contributors to OC among Zimbabweans. Awareness of the eating habits of sweet potatoes and using the kitchen as a dining area could significantly reduce cases of OC among Zimbabweans.

Abstract A118: Uptake of cervical cancer screening services in urban Zimbabwe: Healthcare provider perspectives

Abstract Background: In sub-Saharan Africa, Zimbabwe is among the top 6 countries with the highest cervical cancer incidence and mortality rates. Despite the disproportionate and growing burden, uptake of cervical cancer screening remains low. Little is known about the perceptions of healthcare providers who play a vital role in the provision and implementation of cervical cancer screening. This study explores healthcare provider perceptions of the factors that influence the uptake of cervical cancer screening in Zimbabwe. Methods: One-on-one in-depth interviews were conducted with healthcare providers currently or previously involved in cervical cancer prevention programs at select hospitals and clinics in Harare and Chinhoyi – two urban cities in Zimbabwe. A deductive thematic approach was used to analyze qualitative data to understand factors influencing the provision and uptake of cervical cancer screening. Results: We conducted 21 interviews with healthcare providers working in cervical cancer prevention for an average of 4 years. Three main themes related to the provision of cervical cancer screening were funding availability through donor support, demand of screening services, and availability of technical and human resources. Experiencing symptoms and no-cost screening services were perceived as facilitators for uptake of cervical cancer screening, while lack of adequate health education about cervical cancer and misconceptions about the screening procedure and outcomes were perceived as barriers to uptake of screening. Majority of the providers recommended increased sensitization and health education through various platforms; outreach initiatives; and training of more healthcare providers to conduct cervical cancer screening. Conclusion: This study contributes to a holistic understanding and identification of intervention points to effectively increase uptake of cervical cancer screening. Multi-level strategies promoting awareness of cervical cancer screening and strengthening healthcare systems may contribute significantly to increasing cervical cancer screening rates which in turn will lead to reducing the burden of cervical cancer in Zimbabwe. Citation Format: Thembekile Shato, Ucheoma Nwaozuru, Eric Adjei Boakye, Qiang John Fu, Juliet Iwelunmor, Anne Sebert Kuhlmann. Uptake of cervical cancer screening services in urban Zimbabwe: Healthcare provider perspectives [abstract]. In: Proceedings of the 15th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2022 Sep 16-19; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2022;31(1 Suppl):Abstract nr A118.

Experiences of cervical cancer screening in HIV-positive women in Zimbabwe.

BackgroundThe primary purpose of screening is to detect individuals in danger of cervical cancer so as to prevent further progression of the disease. Cervical cancer remains a global concern, as it ranks as the fourth most commonly diagnosed female malignancy worldwide. It is the commonest female cancer in Zimbabwe. Women living with human immunodeficiency virus (HIV) have a disproportionate risk of invasive cervical cancer, as they are 2–12 times more likely to develop pre-cancerous lesions. As a result of the increased risk, routine screenings are suggested. Few women are screened for cervical cancer in Zimbabwe.ObjectivesThis study aimed at describing the experiences of screening for cervical cancer and motivation behind screening.MethodThe study employed a qualitative research approach. In-depth one to one interviews and focus group discussions were conducted using interview and focus group guides. The study was conducted at an opportunistic infections clinic in Mpilo Central Hospital. Data analysis was performed by using Giorgi’s descriptive method of data analysis.ResultsThe themes that emerged from data analysis were facilitators to screening for cervical cancer, community awareness of cervical cancer screening, free cervical cancer treatment and more screening centres and integrating cervical cancer screening with HIV care.ConclusionIn-depth understanding of the factors that enable women to take part in cervical cancer screening is essential so that these factors can be strengthened to improve uptake of cervical cancer screening services.

Breast cancer in Zimbabwe: patterns of care and correlates of adherence in a national referral hospital radiotherapy center cohort from 2014 to 2018.

BackgroundBreast cancer is the second most common cancer among women in Zimbabwe. Patients face socioeconomic barriers to accessing oncology care, including radiotherapy. We sought to understand patterns of care and adherence for women with breast cancer in sub‐Saharan Africa (SSA) with radiotherapy access.MethodsA retrospective cohort was created for women with breast cancer evaluated at the Parirenyatwa Hospital Radiotherapy and Oncology Center (RTC) from 2014 to 2018. Clinical data were collected to define patterns of care. Non‐adherence was modeled as a binary outcome with different criteria for patients with localized versus metastatic disease.ResultsIn total, 351 women presented with breast cancer with median age 51 at diagnosis (IQR: 43–61). Receptor status was missing for 71% (248). 199 (57%) had non‐metastatic disease, and 152 (43%) had metastases. Of women with localized disease, 34% received post‐mastectomy radiation. Of women with metastatic disease, 9.7% received radiotherapy. Metastatic disease and missing HIV status were associated with increased odds of study‐defined non‐adherence (aOR: 1.85, 95% CI: 1.05, 3.28; aOR: 2.13, 95% CI: 1.11, 4.05), while availability of ER/PR status was associated with lower odds of non‐adherence (aOR: 0.18, 95% CI: 0.09, 0.36).ConclusionsRadiotherapy is likely underutilized for women with breast cancer, even in a setting with public sector availability. Exploring patient‐level factors that influence adherence to care may provide clinicians with better tools to support adherence and improve survival. Greater investment is needed in multidisciplinary, multimodality care for breast cancer in SSA.

A survey of ethnomedicinal plants used to treat cancer by traditional medicine practitioners in Zimbabwe

BackgroundTraditional medicine plays an important role in health care provision in the developing world. A number of cancer patients have been found to be using traditional medicine as primary therapy and/or as complementary medicine. Cancer is one of the leading causes of morbidity and mortality globally among the non-communicable diseases. The aim of this study was to identify the plants used by traditional medicine practitioners (TMPs) in Zimbabwe to treat cancer.MethodsA structured questionnaire was used to interview consenting registered TMPs on ethnomedicinal plants they use to treat cancer. A review of published literature on the cited plants was also carried out. The practitioners were asked about the plants that they use to treat cancer, the plant parts used, type of cancer treated, other medicinal uses of the plants and preparation and administration of the plant parts.ResultsTwenty (20) TMPs took part in the study. A total of 18 medicinal plant species were cited. The commonly treated types of cancer were breast, prostate, colon, skin and blood cancers with most plants being used to treat skin, blood and breast cancers, respectively. Of the medicinal plants cited, 44.4% were used to treat all cancer types. The most used plant parts were the roots (72.2%) and leaves (72.2%) followed by the bark (38.9%). The medicinal plants were used for multiple ailments. The most common plant preparation methods were infusion (72.2%) and decoction (66.7%) and the oral route of administration, as extracts and powder put in tea and porridge, was the most used.ConclusionThe frequently used plant parts were leaves and roots. The traditional uses of the medicinal plants cited in this study resonate well with their reported uses from other ethnopharmacological studies done in other parts of the world. The plants used by TMPs to treat cancer in Zimbabwe, if adequately explored, can be instrumental in the discovery and development of cancer drugs.

A case-control study of risk factors for colorectal cancer in an African population.

The interplay between hereditary and environmental factors in the causation of colorectal cancer in sub-Saharan Africa is poorly understood. We carried out a community based case-control study to identify the risk factors associated with colorectal cancer in Zimbabwe. We recruited 101 cases of colorectal cancer and 202 controls, matched for age, sex and domicile. Potential risk factors including family history, socioeconomic status, urbanization, diabetes mellitus and previous schistosomiasis were evaluated. Conditional logistic regression was used to estimate the odds ratios associated with the different factors. Cases were more likely to have a tertiary education (32.7 vs. 13.4%, P<0.001) and a higher income (18.8 vs. 6.9%, P=0.002). After multivariate analysis, diabetes mellitus [odds ratio (OR): 5.3; 95% confidence interval (CI): 1.4-19.9; P=0.012], previous urban domicile (OR: 2.8; 95% CI: 1.0-7.8; P=0.042), previous schistosomiasis (OR: 2.4; 95% CI: 1.4-4.2; P=0.001) and cancer in a first-degree relative (OR: 2.4; 95% CI: 1.2-4.8; P=0.018) were associated independently with colorectal cancer. Our findings suggest that family history, diabetes mellitus, previous schistosomiasis and approximation to a western lifestyle are the predominant associations with colorectal cancer in Africans. This offers opportunities for targeted prevention and hypothesis-driven research into the aetiology of colorectal cancer in this population.

Human papillomavirus types causing recurrent respiratory papillomatosis in Zimbabwe

ObjectiveRecurrent respiratory papillomatosis (RRP) caused by human papillomavirus (HPV) is preventable through vaccination. This study was motivated by the recent thrust of the Zimbabwean government to reduce incidence of HPV related cervical cancer in Zimbabwe through vaccination against HPV. We therefore set out to type HPV genotypes causing RRP in Zimbabwe. We also describe for the first time, the demographics of Zimbabwean RRP patients, the characteristics of patients with different HPV types and possible risk factors of HPV infection in our setting. MethodsWe conducted a prospective, hospital based study were patients were recruited from two national otorhinolaryngology hospitals in Zimbabwe. All patients diagnosed with RRP during a twenty four month period were included in the study. A questionnaire was administered per patient to collect both demographic and clinical variables. HPV DNA was extracted from formalin fixed paraffin embedded laryngeal tissue. The extracted HPV DNA was amplified using polymerase chain reaction and next generation sequencing was used to genotype the HPV types. ResultsA total of 52 patients all aged 14 years and under were recruited into the study. Only Juvenile onset RRP cases were observed over the two year period and 64% of the patients were HPV positive. HPV types 6 and 11 were the dominant types observed constituting 85% of all HPV types. The remaining 15% constituted of HPV 16 and HPV 18. 27% of the patients had coinfection with at least two different HPV types. There were no statistically significant differences between the characteristics of HPV positive and HPV negative patients. No statistically significant risk factors were observed. ConclusionHPV types 6 and 11 were the predominant genotypes causing RRP in Zimbabwe. Thus the use of quadrivalent or even nonavalent HPV vaccines may play an important role in the prevention and management of RRP in Zimbabwe.

Dietary patterns and colorectal cancer risk in Zimbabwe: A population based case-control study

BackgroundThe rising incidence of colorectal cancer in sub-Saharan Africa may be partly caused by changing dietary patterns. We sought to establish the association between dietary patterns and colorectal cancer in Zimbabwe. MethodsOne hundred colorectal cancer cases and 200 community-based controls were recruited. Data were collected using a food frequency questionnaire, and dietary patterns derived by principal component analysis. Generalised linear and logistic regression models were used to assess the associations between dietary patterns, participant characteristics and colorectal cancer. ResultsThree main dietary patterns were identified: traditional African, urbanised and processed food. The traditional African diet appeared protective against colorectal cancer (Odds Ratio (OR) 0.35; 95% Confidence Interval (CI), 0.21 – 0.58), which had no association with the urban (OR 0.68; 95% CI, 0.43–1.08), or processed food (OR 0.91; 0.58–1.41) patterns. The traditional African diet was associated with rural domicile, (OR 1.26; 95% CI, 1.00–1.59), and a low income (OR1.48; 95% CI, 1.06–2.08). The urbanised diet was associated with urban domicile (OR 1.70; 95% CI, 1.38–2.10), secondary (OR 1.30; 95% CI, 1.07–1.59) or tertiary education (OR 1.48; 95% CI, 1.11–1.97), and monthly incomes of $201–500 (OR 1.30; 95% CI, 1.05–1.62), and the processed food pattern with tertiary education (OR 1.42; 95% CI, 1.05–1.92), and income >$1000/month (OR 1.48; 95% CI, 1.02–2.15). ConclusionA shift away from protective, traditional African dietary patterns may partly explain the rising incidence of colorectal cancer in sub-Saharan Africa.

Human Papillomavirus Genotypes in Invasive Cervical Carcinoma in HIV-Seropositive and HIV-Seronegative Women in Zimbabwe.

Invasive cervical carcinoma (ICC) accounts for 23% of all cancer-related deaths in Zimbabwean women. Trials for a national program of genotype-specific human papillomavirus (HPV) vaccines are underway to prevent cervical carcinoma, but the distribution of HPV types among women with ICC according to HIV status is unknown. To determine prevalence and distribution of high-risk HPV genotypes by HIV status in women with ICC, we performed a cross-sectional study on women referred for ICC testing at 4 urban referral hospitals in Zimbabwe from June 2014 to December 2015. Cervical biopsies were obtained for histology and HPV genotyping. HIV serology testing was performed. HPV testing was performed using MY09/MY11 polymerase chain reaction followed by typing using dot-blot hybridization. Of 107 participants with histologically proven ICC, HIV prevalence was 49.5% (53/107). HIV-positive women tended to be younger (median age 44 years) than HIV-negative women (median age 59 years). HPV prevalence was 94% (101/107), ranging from 1 to 5 genotypes per participant. HPV 16 (81.5%), 18 (24%), 33 (13%), 35 (11%), 56 (9%), and 45 (7.4%) were the most prevalent genotypes among HIV-negative participants; HPV 16 (67.9%), 18 (43.4%), 56 (18.9%), 45 (15.1%), 33 (11.3%), and 58 (9.4%) were the most prevalent among HIV-positive participants. Eighty-three percent of women were infected with either HPV-16 or HPV-18. Effective vaccination programs against HPV 16 and HPV 18 could prevent up to 83% of cases of cervical cancer in Zimbabwe. HIV may influence distribution of some HPV genotypes given the significant increase in prevalence of HPV 18 among HIV-positive participants.

Genotypic diversity of anogenital human papillomavirus in women attending cervical cancer screening in Harare, Zimbabwe.

Although anogenital cancers have been on a gradual rise in developing countries in the past few decades, they have been understudied. The objective was to investigate genotypic diversity of anogenital HPV amongst women reporting for routine cervical cancer screening in Harare in Zimbabwe. A cross-sectional study that enrolled 144 women ≥18 years from a cervical cancer-screening clinic was performed. Each woman provided a self-collected cervico-vaginal swab (VS) and a clinician-collected anal swab (CCAS). HIV testing was offered and cervical cytology was performed. Both VS and CCAS samples were HPV genotyped, using amplicon sequencing of the L1 gene region with Illumina technology. Mean age of the women was 39.9 (range 18-83 years, SD ± 11.0). HPV prevalence was 72% (104/144) in VS and 48% (69/144) in CCAS. The most common genotypes detected in both VS and CCAS were HPV18, HPV52, and HPV16. Sixty two percent of the subjects had multiple genotypic HPV infections. The odds of being HPV-positive among HIV-infected women were higher than in HIV-negative women in both the vagina and the anus (CCAS OR = 4.8; CI 2.4-9.8, P < 0.001) and (VS OR = 2.9; CI 1.3-6.4, P = 0.005). High HPV prevalence and diverse genotypes were detected in both the vagina and anus. Anal oncogenic HPV infection was common. HPV 52 was one of the most common oncogenic genotypes in both the vagina and anus. HIV co-infection played a significant role in the prevalence of HPV. These data have implications for design of primary and secondary programs for prevention of anogenital cancer in Zimbabwe.

Cervical cancer in Zimbabwe: a situation analysis

IntroductionDespite the wide-spread availability of cervical cancer prevention and screening programs in developed countries, the morbidity and mortality rates of cervical cancer in Zimbabwe are still very high. Limited resources as well as the high HIV prevalence are contributors to the high burden of cervical cancer. This paper aims to analyse the policies, frameworks and current practices in the management of cervical cancer in Zimbabwe.MethodsA review of national documents and published literature on cervical cancer prevention, screening, treatment and knowledge in Zimbabwe was done. Informal interviews were conducted to assess the practices of cervical cancer management.ResultsThrough strategic collaboration, a pilot for the HPV vaccination program is underway. The VIAC national cervical cancer screening program is being adopted into the current healthcare system. With regards to the treatment of precancerous lesions we found that the "see and treat" program has been implemented in colposcopy clinics. In addition, there are two multidisciplinary cancer treatment clinics installed in two central public hospitals. The general knowledge and understanding of cervical cancer is poor in Zimbabwe.ConclusionLimitations in resources, infrastructure, manpower, delays in treatment and patient knowledge play a role in the high morbidity and mortality of cervical cancer in Zimbabwe. The Ministry of Health needs to increase funding to expedite the availability of HPV vaccine and screening programs. Community engagement initiatives to raise awareness on cervical cancer should be established to provide education on how to prevent the development of cervical cancer, as well as promote screening for early detection.

Human Papillomavirus Genotypes in Invasive Cervical Carcinoma in HIV Seropositive and Seronegative Women in Zimbabwe

Background: Invasive cervical carcinoma (ICC) accounts for 23% of all cancer-related deaths in Zimbabwean women. Trials for a national program of genotype-specific HPV vaccines are underway to prevent cervical carcinoma, but the distribution of HPV types among women with ICC according to HIV status is unknown.Methods: To determine prevalence and distribution of high-risk HPV genotypes by HIV status in women with ICC, we performed a cross-sectional study on women referred for ICC testing at four urban referral hospitals in Zimbabwe from June 2014-December 2015. Cervical biopsies were obtained for histology and HPV genotyping. HIV serology testing was performed. HPV testing was performed using MY09/MY11 PCR followed by typing using dot blot hybridization.Results: Of 107 participants with histologically-proven, HIV prevalence was 49.5% (53/107). HIV-positive women tended to be younger (median age 44 years) than HIV-negative women (median age 59 years). HPV prevalence was 94% (101/107), ranging from 1-5 genotypes per participant. HPV 16 (81.5%), 18 (24%), 33 (13%), 35 (11%), 56 (9%) and 45(7.4%) were the most prevalent genotypes amongst HIV-negative participants; HPV 16 (67.9%), 18 (43.4%), 56 (18.9%), 45 (15.1%), 33 (11.3%), and 58 (9.4%) were most prevalent amongst HIV-positive participants. 83% of women were infected with either HPV-16 or HPV-18.Conclusion: Effective vaccination programs against HPV 16 and 18 could prevent up to 83% of cases of cervical cancer in Zimbabwe. HIV may influence distribution of some HPV genotypes given the significant increase in prevalence of HPV 18 amongst HIV positive participants.

The Emerging Pattern in Prostate Cancer in Zimbabwe

The Emerging Pattern in Prostate Cancer in Zimbabwe

A Phenomenological Study into the Role of Spirituality and Religiousness in the Mental Health of People with Cancer in Zimbabwe

ABSTRACTThis study examines the role of spirituality in illness management and mental health of selected people with cancer in Harare, Zimbabwe. The study inspects religiosity and spiritual elements among people with cancer. Narratives of women and men with cancer situated on different body sites was gathered using qualitative methodology. Data is analyzed using interpretive phenomenological analysis. Results indicate the central role of spiritual well-being and spirituality among people with cancer. Crucially, owing to scarcity and low uptake of institutionalized services, churches become essential conduits to cater for the spiritual well-being of people with cancer in resource constrained settings like Zimbabwe.

Typing of human papillomavirus in Zimbabwean patients with invasive cancer of the uterine cervix.

Cervical cancer affects 1 in 2000 Zimbabwean women. We investigated the type-specific distribution of human papillomavirus (HPV) infection in Zimbabwean women with invasive cervical cancer. We conducted a descriptive study on 98 women with invasive cervical cancer. The methods used were a nested polymerase chain reaction (PCR) for amplification of HPV-DNA and restriction fragment length polymorphism (RFLP) to characterize the HPV types. HPV-DNA was identified in 97% of the cases. HPV types 16, 33, 18 and 31 were identified in 61%, 39%, 18% and 4% of the patients, respectively. We typed one case each of HPV types 35 and 58. Multiple HPV infections were present in 24%. All patients (n = 3) with adenocarcinoma of the cervix were infected with the HPV. Patients infected with HPV-16 alone presented at a median age of 46 years while those infected with HPV-33 alone presented at 43 years. However, patients coinfected with both HPV-16 and HPV-33 were between 10 and 13 years older (median age of 56 years) than patients with either HPV-16 or HPV-33 as single infections. These differences were marginally significant (p = 0.08) or significant (p = 0.02), respectively. We present the first prevalence data on HPV types in patients with cervical cancer in Zimbabwe and show that, provided appropriate techniques are employed, HPV infection can be identified in a majority of the patients. The distribution of HPV types should be taken into consideration in tailoring locally relevant vaccines against HPV.

Typing of human papillomavirus in Zimbabwean patients with invasive cancer of the uterine cervix

Background. Cervical cancer affects 1 in 2000 Zimbabwean women. We investigated the type-specific distribution of human papillomavirus (HPV) infection in Zimbabwean women with invasive cervical cancer. Methods. We conducted a descriptive study on 98 women with invasive cervical cancer. The methods used were a nested polymerase chain reaction (PCR) for amplification of HPV-DNA and restriction fragment length polymorphism (RFLP) to characterize the HPV types. Results. HPV-DNA was identified in 97% of the cases. HPV types 16, 33, 18 and 31 were identified in 61%, 39%, 18% and 4% of the patients, respectively. We typed one case each of HPV types 35 and 58. Multiple HPV infections were present in 24%. All patients (n = 3) with adenocarcinoma of the cervix were infected with the HPV. Patients infected with HPV-16 alone presented at a median age of 46 years while those infected with HPV-33 alone presented at 43 years. However, patients coinfected with both HPV-16 and HPV-33 were between 10 and 13 years older (median age of 56 years) than patients with either HPV-16 or HPV-33 as single infections. These differences were marginally significant (p = 0.08) or significant (p = 0.02), respectively. Conclusion. We present the first prevalence data on HPV types in patients with cervical cancer in Zimbabwe and show that, provided appropriate techniques are employed, HPV infection can be identified in a majority of the patients. The distribution of HPV types should be taken into consideration in tailoring locally relevant vaccines against HPV.

Low risk and high risk human papillomaviruses (HPVs) and cervical cancer in Zimbabwe: epidemiological evidence.

To establish the prevalence of detectable low-risk and high-risk, oncogenic HPV types in cervical swabs of women with histologically proven cancer of the cervix. Cross sectional study. Harare Central and Parirenyatwa Hospitals. 119 women with histologically proven cervical cancer of whom 63 had the degree of differentiation of the tumour reported. Frequency of infection with high and low-risk human papillomaviruses. The presence of HPV DNA was demonstrated in 63% (75/119) of cases. Low risk HPVs were present in 26% (31/119) and high-risk HPVs were demonstrated in 51% (61/119) of samples tested. Co-infection with both low-risk and high-risk HPVs was observed in 14% (17/119) of the specimens. High-risk HPVs were detected in 55% (21/38) of poorly differentiated tumours while 60% (15/25) of moderately and well-differentiated tumours showed the presence of high-risk HPVs. High-risk human papillomaviruses are associated with cervical cancer. There was no significant difference in the frequency of high-risk HPV types in women with moderately to well-differentiated tumours and those with poorly-differentiated tumours.

Epidemiology of prostate cancer.

Malignant transformation of the prostate and progression of carcinoma appear to be the consequence of a complex series of initiation and promotional events under genetic and environmental influences. Increased incidence of the condition may be the result of improved detection, greater awareness of the condition, and possibly an increased life expectancy accompanied by a decrease in competing causes of death rather than a true increase in the prevalence of the disease. The marked racial and geographic differences are probably multifactorial, with genetic, environmental, and possibly social influences affecting progression of the disease. Among several risk factors, evidence for the familial inheritance of some prostate cancers is compelling. Dietary influences, hormonal milieu, and the role of environmental carcinogens are currently under intense investigation. As further risk factors are identified, it will become increasingly important to identify individuals at increased risk for the disease. These men should undergo regular evaluation with state-of-the-art methods.