Most likely due to fall/jump from a height (ie crush, #) pushes sesamoids into plantar surface of metatarsal head.
History of trauma;; pain on direct palpation and MPJ motion (especially dorsiflexion);
Differential - bipartite sesamoid (edges usually smooth); sesamoiditis; stress fracture; turf toe; plantar hyperkeratosis
On x-ray – fracture usually divides sesamoid into equal parts; has irregular borders and serrated edges; bone callous formation
If x0ray is not definitive bone scan, CT or MRI
Cast immobilisation; metatarsal bar; accommodative padding; rigid sole shoe.
After pain reduction soft cushioning insoles or running shoe
If prolonged pain surgical excision