What is characterized by an oval-shaped nevoid plaque with pigmented skin associated with tuberous sclerosis?

The condition characterized by an oval-shaped nevoid plaque with pigmented skin associated with tuberous sclerosis is indeed shagreen skin. Shagreen skin is a manifestation of tuberous sclerosis, where patients develop raised, leathery plaques that are often tan or light brown in color, resembling the surface of shagreen leather. These plaques typically occur on the lower back but can appear in other areas of the body.

In the context of tuberous sclerosis, the presence of shagreen skin, along with other findings like facial angiofibromas and ash-leaf spots, contributes to the diagnosis of this genetic disorder. Understanding the specific characteristics of shagreen skin helps clinicians recognize it as part of the broader spectrum of findings in tuberous sclerosis.

The other conditions listed, such as Sturge-Weber syndrome, nevoid basal cell carcinoma syndrome, and cherry angioma, have distinctly different clinical features that do not include the specific oval-shaped nevoid plaques associated with shagreen skin.