Fig. 2
From: Stress fracture of the pelvis and lower limbs including atypical femoral fractures—a review
An elderly female attending for an ultrasound of the foot to assess forefoot pain. A longitudinal ultrasound image (left side is proximal) demonstrates partly ossified hypervascular callus (white arrows) of a metatarsal (a) suggestive of a healing metatarsal fracture. A PA radiograph of the left foot (b) shows evidence of previous surgery (white arrows) and a typical stress fracture of the left third metatarsal (white arrow). Previous surgery particularly of the feet is a risk factor for the development of stress fractures. Ultrasound is not the imaging modality of choice for the assessment of stress fractures but can incidentally show stress fractures