[Echographic findings and differential diagnosis in (peri-)orbital dermoid cysts].

The analysis of echographic findings in 34 patients with histologically proven dermoids revealed the following characteristic criteria: A scan sonography shows a roundish, regularly structured lesion of variably high reflectance bordered by a very high, double-peaked surface spike. There is a strong correlation between the degree of reflectivity, the consistency of the dermoid, and the composition of its contents. The B-scan shows a sharply outlined lesion with homogeneously distributed internal echos. Differential diagnoses are discussed on the basis of echographic findings and criteria.