Syntax

Syntactic actants

Actant 1: whose thigh it is
(a) Genitive
(b) Possessive
Ляжки девочки были длинные и худые. The little girl's thighs were long and thin.
Брюки плотно облегали его ляжки. The pants fit snugly around his thighs.
NB When the word ляжка functions as a subject and does not have a descriptive modifier, the construction ляжка у + Genitive is often preferred to (a) and (b), above:
Ляжки у девочки были длинные и худые. The little girl's thighs were long and thin.

Restrictive modifiers

(a) adjectival modifier
левая/правая ляжка the left/right thigh
Левая ляжка у неё посинела от удара. She had an enormous bruise on her left thigh.