Diagnostic criteria# |  |   Diagnostic category |  |
---|---|---|---|
 | Fetal Alcohol Syndrome (FAS) | Partial Fetal Alcohol Syndrome (PFAS) | Neurodevelopmental Disorder-Alcohol Exposed (ND-AE) |
Requirements for diagnosis | Requires all 4 of the following criteria to be met: | Requires confirmed prenatal alcohol exposure, the presence of 2 of the 3 characteristic FAS facial anomalies at any age, and CNS criteria to be met: | Requires confirmed prenatal alcohol exposure and CNS criteria to be met: |
Prenatal alcohol exposure | Confirmed or unknown | Confirmed | Confirmed |
Facial anomalies | Simultaneous presentation of all 3 of the following facial anomalies at any age: | Simultaneous presentation of any 2 of the following facial anomalies¤ at any age: | No anomalies required* |
 | i. short palpebral fissure length (2 or more standard deviations below the mean) | i. short palpebral fissure length (2 or more standard deviations below the mean) |  |
 | ii. smooth philtrum (Rank 4 or 5 on the UW Lip-Philtrum Guide†) | ii. smooth philtrum (Rank 4 or 5 on the UW Lip-Philtrum Guide†) |  |
 | iii. thin upper lip (Rank 4 or 5 on the UW Lip-Philtrum Guide†) | iii. thin upper lip (Rank 4 or 5 on the UW Lip-Philtrum Guide†) |  |
Growth deficit | Prenatal or postnatal growth deficit indicated by birth length or weight ≤ 10th percentile adjusted for gestational age, or postnatal height or weight ≤ 10th percentile | No deficit required* | No deficit required* |
Central Nervous System (CNS) abnormality | At least 1 of the following: | ||
i. clinically significant structural abnormality (e.g. OFC ≤ 3rd percentile, abnormal brain structure), or neurological abnormality (seizure disorder or hard neurological signs); and/or | |||
 | ii. severe dysfunction (impairment in 3 or more domains of function, 2 or more standard deviations below the mean) ‡ |