“…Due to the rarity of this disease, most pediatricians have not had the opportunity to attend to and treat such cases ( 14 ). Unfamiliarity with PSO may contribute to a delay in diagnosis ( 4 ), and the consequences of such a delay may be hazardous due to the seriousness of potential complications, such as fistula formation, indolent osteomyelitis and mediastinitis, as well as erosion of large vessels ( 5 , 15 ).…”