Introduction: Reminder/recall interventions have been shown to improve immunization coverage. The perception of mothers/caregivers may influence the outcome of such interventions. The attitude of Nigerian mothers to reminders/ recalls using cell phones was evaluated. Methods: This was a crosssectional observational study carried out (August to October 2012) on mothers attending the child welfare clinic of the

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Aim: Secondary malignancy estimation after radiotherapy of post mastectomy patients is becoming an important subject for comparative treatment planning. The data from modern treatment planning systems provide accurate three-dimensional dose distributions for each individual patients, thereby opening up new possibilities for more precise estimates of secondary cancer incidence rates in the irradiated organs. Methods: This study estimates the probability of secondary malignancy using radiobiological model for post mastectomy patients in a low-resource center, Nigeria. The secondary cancer complication probability (SCCP) was computed for linear, linear-exponent and linear-plateau models. Results: The result shows that comparing the three models the mean SCCP for the contralateral breast ranged between 0.41%-0.93%; for the lung (0.34%-5.93%); while for the chest wall is between 0.65%-31.95%. Also, the result showed that based on the differential dose volume histogram, the SCCP in the chest wall is highest compared to the lung and contralateral breast; while the linear model overestimate the risk of secondary malignancy, the linear-exponent and the linear plateaus gave values not outrageously high. Conclusion: The models in this study have shown that the risk of secondary malignancy in these post mastectomy patients is low.

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