Which of the following is the most common cause of Iselin Disease?

A) Traction apophysitis of the 5th metatarsal tuberosity
B) Atraumatic, repetitive traction of the fibularis brevis tendon at its attachment site
C) Boys and girls around age 10-14 who are physically active and/or participate in sports
D) None of the above

Iselin Disease is commonly caused by atraumatic, repetitive traction of the fibularis brevis tendon at its attachment site, particularly in physically active children and adolescents around 10-14 years old.

Explanation:

The most common cause of Iselin Disease is B) Atraumatic, repetitive traction of fibularis brevis tendon at its attachment site. This condition often affects children and adolescents in the age range of approximately 10-14 years who are physically active or participate in sports. Iselin Disease is specifically a type of traction apophysitis that occurs at the growth plate of the 5th metatarsal tuberosity, where the fibularis brevis tendon attaches.

As these individuals are often still growing, the growth plates are susceptible to injury. Repeated stress, due to physical activities, can lead to irritation and inflammation of the growth plate, resulting in pain and swelling commonly seen in Iselin Disease.