Figure 1: (A-D) The appendiceal intramuscular nodule consisted in large, polygonal cells with granular cytoplasm. (B: Arrows for mega-mitochondria-type globules. C arrow for glycogenic nucleus). They expressed smooth-muscle-actin (Dinset) and desmin (D) in a cytoplasmic/perimembranous, or perinuclear pattern (D: Arrow). Original magnification ×2.5 (A) ×40 (B-D)