Morbus Iselin

Iselin disease is a benign and self-limiting condition, defined as apophysitis of the base of the 5 metatarsal.


It is most commonly seen in males with sport injuries and is often also seen in adolescents.


It is due to repetitive traction of the peroneus brevis tendon at the site of its attachment. Predisposing factors are jumping and running.

Radiographic features

Plain radiograph
  • obliquely oriented small bony fleck at the base of the 5th metatarsal which is best seen on oblique radiograph
  • apophyseal irregularity

Usually not considered essential for the diagnosis. But if performed may show:

  • T2/STIR: high signal intensity around base of 5metatarsal due to bone marrow edema

History and etymology

First described by Hans Iselin (1878-1953) a German surgeon working in Basel, Switzerland, in 1912 .

Differential diagnosis

On imaging consider:

Siehe auch: