Treatment refractory mast cell leukemia with dominant gastrointestinal manifestation and concomitant skin symptoms: A case report

Figure 1 Osteolytic lesions in pelvic bones (arrows) in computed tomography scan.

Figure 2 Hematoxylin-eosin staining of trephine biopsy presenting with mast cell leukemia infiltrates. Atypical mast cell morphology–spindle-shaped cells (magnification × 400).

Figure 3 Mast cell tryptase immunostaining in bone marrow infiltrates (magnification × 400).

Figure 4 Aberrant diffuse CD25 expression in neoplastic mast cells in trephine biopsy (magnification × 200).

Figure 5 Membrane CD117 expression in neoplastic mast cells in trephine biopsy (magnification × 200).