From: Free gracilis end-to-side microanastomosis to a peronea arteria magna: a case report
Type I | Normal level of branching (proximal to the lower border of the popliteus muscle) |
  IA | The PA divides into the AT, the TPT (later divides into PT and PR) |
  IB | The PA trifurcates into AT, PT, and PR |
  IC | The PA divides into the PT, the anterior TPT (later divides into AT and PR) |
Type II | High division of the PA (at or above the knee joint) |
  IIA | The AT originates at or above the knee joint |
  IIB | The PT originates at or above the knee joint |
  IIC | The PR originates at or above the knee joint |
Type III | Hypoplastic or aplastic branching with altered distal supply. |
  IIIA | Hypoplastic/aplastic PT |
  IIIB | Hypoplastic/aplastic AT |
  IIIC | Both tibial arteries are hypoplastic/aplastic (PAM) |