Perforating veins corresponding to the short saphenous territory
are situated in a zone between the posterolateral surface
of the thigh and the bimalleolar line, which passes underneath
the medial and lateral malleoli and separates the territory
of perforating veins of the foot from that of the perforating
veins of the ankle.
Some anatomical landmarks will help define their topography:

the popliteal crease (in the center of the popliteal fossa);

the cutaneous projection of the soleus muscle arch (4 fingerbreadths
below the popliteal crease);

the tip of the gastrocnemius muscles (lower limit of the fleshy
part of these muscles, at the junction of the middle and lower
thirds of the leg);

the bimalleolar line.
Figure
93 presents a general view of the perforating veins of the
short saphenous territory.
Profunda femoris perforating veins connect a suprapopliteal
trunk, constituting a continuation of the short saphenous vein
on the posterior surface of the thigh, with the profunda femoris
network of veins. These veins have an intramuscular course,
which is longitudinal in relation to the axis of the femur.
Superficial femoral perforating veins correspond to posterior
variants of Boyd's perforating veins
(see Long saphenous territory).
Perforating veins of the popliteal fossa are derived
directly from the popliteal vein adjacent to the anastomosis
of the common gastrocnemius vein. They perforate the fascia
in the popliteal fossa.
Medial gastrocnemius perforating veins generally connect
the intersaphenous vessels or the short saphenous vein itself
and its collaterals to the medial gastrocnemius veins. The rich
network created makes the middle segment of the short saphenous
vein a crossroads for exchanges between the short saphenous.
medial, and lateral gastrocnemius veins.
Gillot's lower pole perforating vein connects a large inferior
medial gastrocnemius trunk with the short saphenous vein or
an intersaphenous arch. It is situated 3 to 7 cm below the tip
of the gastrocnemius muscles. It can be duplicated or accompanied
by a group of two to three satellite gastrocnemius perforating
veins, or even by a soleus perforating vein.
Peroneal perforating veins ensure com-munication between
the peroneal vein and collateral short saphenous veins, but
also with collaterals derived from the long saphenous vein or
infrapopliteal veins.
Medial perforating veins of the ankle are mostly situated
adjacent to the malleolus, above the bimalleolar line. More
posterior than Cockett's perforating veins, they also have a
smaller caliber (1 to 1.5 mm). However, they can also participate
in the pathogenesis of cellulitis and leg ulcer. They connect
the deep network of posterior tibial veins with a collateral
short saphenous vein passing medially to tendon calcaneus or
with an intersaphenous arch. They are sometimes related to the
medial inframalleolar perforating veins of the foot, or more
rarely with an inferior vein of the soleus muscle.

Further reading
Dortu J., Dortu JA. Les veines perforantes du membre inférieur : physiologie
et physiopathologie. Phlébologie, 1994; 47: 167-75.
Gillot C. Les veines perforantes inférieures de la jambe, de la cheville
et du pied. Phlébologie, 1994; 47: 76-104.
Thomson H. The surgical anatomy of the superficial and perforating veins of
the lower limb. Annals of the Royal College of Surgeons, 1979; 61: 197-205.