Coexistence of symptomatic cyamella and multiple fabellae: A case report.

Abstract

The cyamella, an ossified cartilaginous body within the proximal tendon or at the musculotendinous junction of the popliteal muscle, is a rarely observed and generally asymptomatic sesamoid bone of the knee.1-4 The prevalence of ossified cyamella is reported to be between 0.57 and 1.8%.3 A symptomatic cyamella is very rare and described in the literature only in few case reports.2,4,5 The fabella is also a sesamoid bone typically found in the lateral head of the gastrocnemius. It may be bony, fibrocartilaginous, or both in nature and may occasionally be found in the medial head of the gastrocnemius. Although the incidence of fabella is reported as 10 to 30% in the general population,6 information on the incidence of multiple fabellae is not present in the literature. To our knowledge, the coexistence of symptomatic cyamella with multiple fabellae on radiological imaging has not been published in the literature.