Benign prostatic hyperplasia

• Arises in transition zone
• Hyperplasia of prostatic tissue 
• Variable degrees of glandular, muscular and fibrous components

Imaging 

• Heterogeneity of hypertrophy seen as varying signals in T2 and variable diffusivity 
• Nodules may grow exophytically to protrude into peripheral zone
• Dynamic contrast enhanced MRI shows rich vascular areas interspersed with variable vascular areas.  

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Kahn, T., et al. “Prostatic carcinoma and benign prostatic hyperplasia: MR imaging with histopathologic correlation.” Radiology 173.3 (1989): 847-851.

Thorpe, A., and D. Neal. “Benign prostatic hyperplasia.” The Lancet 361.9366 (2003): 1359-1367.