tendinous sheath of flexor digitorum longus muscle (of foot)
Definition: the tibial tarsal synovial tendon sheath that envelops the flexor digitorum longus tendons as they pass into the foot deep to the flexor retinaculum.
Synonym(s): vagina tendinum musculi flexoris digitorum (pedis) longiTA
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Examples: glitazone, GI cocktail, etc.