What is a common characteristic of Multicystic dysplastic kidney?

Multicystic dysplastic kidney (MCDK) is characterized primarily by the presence of non-communicating cysts within the renal parenchyma. The condition arises due to abnormal kidney development during fetal life, leading to the formation of multiple cysts that do not connect with one another. Each cyst is typically filled with fluid, and often, there is little to no functioning renal tissue present.

This non-communication between the cysts is a key feature, distinguishing MCDK from other renal conditions that might present with cysts that do connect or share drainage pathways. In MCDK, the cysts vary in size and shape and can create a dramatic appearance on imaging, but their non-communicating nature is a definitive aspect of the disease.

In contrast, the other options describe conditions not associated with MCDK. A hypoechoic solid mass could suggest a different pathology such as a renal tumor or abscess. Benign fatty renal tumors do not relate to MCDK and describe a specific type of neoplasm, while visual impairment in young adults is unrelated to renal structural abnormalities. Overall, the defining feature of non-communicating cysts aptly describes the pathology of multicystic dysplastic kidney.