flexorsis pollicis longus the first, the common synovial sheath of the flexor tendons (vag. Synovialis communis mm. flexorum) is a large medially located sac enclosing eight tendons of the deep and superficial flexors of the fingers,, superiorly it protrudes 1-2 cm proximally of the flexor retinaculum, while inferiorly it reaches the middle the palm. The sheath continues only on the tendons of the long flexors of the little finger, surrounds them, and reaches, together with them, the base of the distal phalanx of the little finger Medical Billing Training will help you to do collections and also the pending amounts from the patients.