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 findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)=
 * Includes: nonspecific abnormal findings on diagnostic imaging by:
 * computerized axial tomography [CAT scan]
 * magnetic resonance imaging [MRI][NMR]
 * positron emission tomography [PET scan]
 * thermography
 * ultrasound [echogram]
 * X-ray examination
 * Excludes1: abnormal findings on antenatal screening of mother (O28.-)
 * diagnostic abnormal findings classified elsewhere - see Alphabetical Index

R90 Abnormal findings on diagnostic imaging of central nervous system

 * R90.0 Intracranial space-occupying lesion found on diagnostic imaging of central nervous system
 * R90.8 Other abnormal findings on diagnostic imaging of central nervous system
 * R90.81 Abnormal echoencephalogram
 * R90.82 White matter disease, unspecified
 * R90.89 Other abnormal findings on diagnostic imaging of central nervous system
 * Other cerebrovascular abnormality found on diagnostic imaging of central nervous system

R91 Abnormal findings on diagnostic imaging of lung

 * Includes: coin lesion NOS found on diagnostic imaging of lung
 * lung mass NOS found on diagnostic imaging of lung

R92 Abnormal and inconclusive findings on diagnostic imaging of breast

 * R92.0 Mammographic microcalcification found on diagnostic imaging of breast
 * Excludes2: mammographic calcification (calculus) found on diagnostic imaging of breast (R92.1)
 * R92.1 Mammographic calcification found on diagnostic imaging of breast
 * Mammographic calculus found on diagnostic imaging of breast
 * R92.2 Inconclusive mammogram
 * Dense breasts NOS
 * Inconclusive mammogram NEC
 * Inconclusive mammography due to dense breasts
 * Inconclusive mammography NEC
 * R92.