Abstract
Background: The formula used for the calculation of prostate volume is roughly the three dimensions of prostate (L×W×H) multiplied by 0.52. Indeed, this is the formula for calculating the volume of a sphere. However, almost all of the papers on this topic describe the shape of the prostate as a pyramid. As the true prostate shape is a rhombohedral regular tetrahedron with a median lobe, a more effective calculation method is needed. Aim of the study: This paper aims to develop a different approach for sonographic measurement of the prostate through mathematical models. Case report: We present a 74-year-old patient with HPH and median lobe hypertrophy. Conclusions: The classical method is insufficient for accurate measurement in patients with median lobe hypertrophy. In prostates with median lobes, the measurement should be calculated as the median lobe volume plus the spheric prostate volume.
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