A 66-year-old woman with plantar fasciitis.In the long-axis view of the proximal plantar fascia, fusiform thickening, hypoechogenicity of the superficial fibers, and perifascial hypoechogenicity (asterisk) are noted. The thickness of the plantar fascia in this case was greater than the 4-mm cut-off for diagnosing plantar fasciitis (double-headed arrow).