Fig. 9
From: Nerve entrapment syndromes of the lower limb: a pictorial review
25-year-old man with sural nerve symptoms and numbness. Sagittal (a) and axial (b) PDFS and axial PD (c and d) demonstrate a ganglion (yellow arrow) arising from the sinus tarsi with superior and intraneural extension extending into the calf along the path of the sural nerve (white arrow). e, f Ultrasound images of a different patient, a 45-year-old female with neuropathic pain in the lateral foot following subtalar joint fusion from post-traumatic osteoarthritis. e The normal fibrillary structure of a normal segment of proximal sural nerve (red arrows). More inferiorly, at level of the surgery (f), there is hypoechoic enlargement of the sural nerve as it traverses the scar tissue (blue arrows), consistent with sural nerve entrapment