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Introduction: Cancers are a major cause of childhood mortality worldwide especially in LMICs where underdiagnoses and lack of quality cancer data hampers effective cancer control efforts. This study aimed to document and describe the patterns and characteristics of childhood cancers in the North East geopolitical zone of Nigeria. Methods: This was a retrospective cross-sectional study that collected cancer data from 4 out of the 6 states in the North East of Nigeria. The data included all malignancies diagnosed in children aged 0-19 years between 2019 and 2022. The age-specific incidence rates were also calculated for the individual 5-year age groups (0-4 years, 5-9 years, 10-14 years, and 15-19 years). The crude incidence rates (CIR) were calculated as the weighted averages of the respective ASRs in each age range within 0-14 years and 0-19 years respectively. The cancers were grouped according to the International Incidence of Childhood Cancers, volume 3 (IICC3). Results: Cancers in people <20 years accounted for 7.3% of all cancers diagnosed over the same period. The crude incidence rates (CIR) for cancers in children and adolescents were 20.9 per million children aged 0-19 years and 18.8 per million children aged 0-14 years respectively, while the age-standardized rates (ASR) were 1.80 and 1.63 per million person-years respectively. There was a variation in the most commonly diagnosed cancers across all age groups. However, lymphomas were the most commonly diagnosed cancers overall, while CNS tumors were overwhelmingly rare. Conclusion: Despite data limitations, this study provides useful insights into patterns of cancers in the region and will hopefully provide a basis for the strengthening of pediatric oncology care, childhood cancer control programs and population-based cancer registries.
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Background: Definitive, affordable, and timely diagnosis of cancer is key to providing data for surveillance and control programmes. Care disparities have been shown to contribute to poorer survival, especially in resource-constrained populations. Here, we describe the profile of histologically diagnosed cancers in our hospital and highlight the possible effects of inadequate diagnostic support on data reporting. Methods: We designed a retrospective cross-sectional descriptive study to review histopathology reports archived at the Department of Pathology of our hospital spanning from January 2011 to December 2022. Cases diagnosed as cancer were retrieved and classified by systems, organs and histology types alongside the patient's age and gender. The trend in the volume of pathology requests and the corresponding malignant diagnosis yield over the period was also documented. Data generated were analyzed statistically using appropriate statistics and presented as proportions and means, with the level of statistical significance set at p < 0.05. Results: There were 488 cancers out of 3,237 histopathology requests received within the study period. Of these 316 (64.7%) were females. Overall mean age was 48.8 ± 18.6 years with a peak age at the sixth decade, females being significantly younger (46.1 versus 53.5 years; p < 0.001). The top five cancers were breast (22.7%), cervical (12.7%), prostate (11.7%), skin (10.7%) and colorectal cancers (8%). Among females, breast, cervical and ovarian cancers predominated, whereas prostate, skin and colorectal cancers, were commonest among males in decreasing order. Paediatric malignancies accounted for 3.7% of all the cases, most being small round blue cell tumours. The volume of pathology requests rose remarkably from 95 cases in 2014 to 625 cases in 2022 with a corresponding increase in cancer case diagnoses. Conclusion: Cancer subtypes and ranking in this study are similar to those from urban populations in Nigeria and Africa, despite the low number of cases recorded. Efforts to reduce the disease burden are warranted.