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Figure 2: Immunoreactivity of balloon cell melanoma; (a) Balloon cells expressed Melan A (original magnification, ×20); (b) Strong cytoplasmic and nuclear expression for S100 (original magnification ×20); (c) HMB 45 expression was restricted to the non-balloon tumor cells (original magnification, ×20)

Figure 2: Immunoreactivity of balloon cell melanoma; (a) Balloon cells expressed Melan A (original magnification, ×20); (b) Strong cytoplasmic and nuclear expression for S100 (original magnification ×20); (c) HMB 45 expression was restricted to the non-balloon tumor cells (original magnification, ×20)