Do Not Hallow until You Are out of the Wood! Ultrasonographic Detection of CPP Crystal Deposits in Menisci: Facts and Pitfalls

Figure 5

In vivo analysis (a), ex vivo analysis (b, c), and macroscopic analysis (d) of a medial meniscus. Note the presence of small round hyperechogenic deposits in a and b (arrowheads). The longitudinal scan of the meniscus in the ex vivo analysis highlighted the presence of hyperechogenic parallel lines (arrowheads) in the upper half of the meniscus, suggesting fibrous tissue, which in a transverse scan could resemble CPP deposits. The US guided cut (white line in panel (c) of the meniscus confirmed the presence of white lines and the absence of CPP deposits (macro- and microscopic).