Figure 5: Photomicrograph (Case 4) on (A) H&E, ×200 showing well preserved architecture with fibers in a mosaic pattern of arrangement. Variation in fiber diameter with small diameter fibers (solid arrow) scattered in between singly or in small groups. (B) Enzyme histochemistry with NADH, ×200 shows lack of differentiation at places, oxidative enzyme activity is seen to be devoid (dotted arrow) or, at places, concentrated in the central area in a large number of fibers