PAM is usually diagnosed on the basis of a typical radiological pattern, namely a very fine, sand-like micronodulation of calcific density diffusely involving both lungs, with basal predominance. Many authors argue that this pattern precludes the need for a lung biopsy in most cases.[1][2][16] After PAM is diagnosed in a given patient, family members should be screened by chest radiography, and parents should be counseled that future children are also at risk of developing the disease.[17]