The cuneiform is a small bone in the midfoot, a stress fracture is like a small crack in the bone. Stress fractures in the foot and ankle can affect athletes of all levels (Mayer et al., 2014).
The cuneiform is part of the tarsals of the human foot, building the midfoot.
This can result from an imbalance between bone formation and bone resorption. When the cuneiform is loaded (running /jumping), it responds by increasing bone turnover. If new bone formation cannot keep up with bone resorption, areas of weakness can develop within the cuneiform and can develop into a stress fracture if the bone is continually loaded. Female athletes can be more prone to stress fractures due to changes in diet and change in menstrual cycle.
Training principles, footwear and biomechanics should be analysed in the treatment of this injury; off loading and resting to let the fracture heal properly is essential.
Mayer S.W. et al., 2014, Stress Fractures in the Foot and Ankle in Athletes, Sports Health, 6(6); pp: 481-491