Involvement of the Inconstant Bursa of the Fifth Metatarsophalangeal Joint in Psoriatic Arthritis: A Clinical and Ultrasonographic Study
Figure 2
US of the lateral surface of the 5th MTP in PsA (gray-scale). (a) Left foot: presence of bursitis (arrowheads) with inhomogeneous hyperechoic pattern. (b) Wide bone erosion (arrow) of the head of the 5th metatarsal below the bursa (arrowheads). (c) Right foot: mixed hyperechoic (single white star) and hypoechoic (double white star) pattern of bursitis (arrow).
