The gastrocnemius muscle is rarely considered today as a musculocutaneous f
lap. Yet, the posterior calf skin by itself can still be used to advantage
as a source of local or perhaps free flaps. Fascial perforators in this reg
ion were reexamined in an anatomic study in 10 fresh cadaveric specimens to
investigate the possibility of a gastrocnemius muscle perforator-based fla
p. At least two substantive perforators were found in all limbs, and there
was always one overlying the medial gastrocnemius muscle (overall mean, 4.0
+/- 1.8 perforators; range, 2-7 perforators). The origin of these perforat
ors in any given specimen was most commonly as a secondary branch from the
medial or lateral sural arteries alone (60%), from the median sural artery
as a direct cutaneous branch alone (10%), or from either of the muscle pedi
cles and/or the median sural artery (30%). Thus, in 90% of limbs, the poten
tial for elevating a gastrocnemius perforator-based flap exists without the
need for any muscle sacrifice. Otherwise, a more traditional posterior cal
f fasciocutaneous flap was possible. Other deeper intramuscular collaterals
were also identified so that sequential use of the muscle as a separate fl
ap does not seem to be compromised.