The tibial tuberosity is a substantial upside down triangular region under the site of junction in the middle of the two condyles, on the anterior part of the tibia. An extension of the quadriceps femoris tendon under the patella, the patellar ligament attaches to this site. It is a protrusion at the apex of rough triangular area on the anterior part of upper end of the tibia. It is divided within an upper smooth and a lower rough portion.
The patellar ligament attaches to the upper smooth part. Lower rough part is connected to the subcutaneous infrapatellar bursa which divides it from the skin. Rough triangular area above the tuberosity is associated with the deep infrapatellar bursa.
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