CCAM Type I is defined by which feature?

CCAM Type I is defined by which feature?

• A. One Or More Cysts Larger Than 2 Cm
• B. Multiple Small Cysts Less Than 2 Cm
• C. Multiple Micro Cysts That Appear As A Solid Mass
• D. A Single Cyst Less Than 1 Cm

Answer: (A)

The key idea is that CCAM (CPAM) types are classified by the size of the cysts seen on imaging. Type I is defined by macrocystic features—one or more cysts that are larger than 2 cm in diameter. This large-cyst pattern sets it apart from other types: Type II shows multiple small cysts under 2 cm, and Type III appears as a solid mass because the cysts are microcysts too small to be distinguished individually. So, seeing one or more cysts bigger than 2 cm best fits Type I. In practice, these macrocystic lesions guide prognosis and management, with large cysts being more amenable to surgical considerations if needed. The other descriptions describe the smaller or more diffuse cyst patterns seen in the other CCAM types.

The key idea is that CCAM (CPAM) types are classified by the size of the cysts seen on imaging. Type I is defined by macrocystic features—one or more cysts that are larger than 2 cm in diameter. This large-cyst pattern sets it apart from other types: Type II shows multiple small cysts under 2 cm, and Type III appears as a solid mass because the cysts are microcysts too small to be distinguished individually. So, seeing one or more cysts bigger than 2 cm best fits Type I. In practice, these macrocystic lesions guide prognosis and management, with large cysts being more amenable to surgical considerations if needed. The other descriptions describe the smaller or more diffuse cyst patterns seen in the other CCAM types.