CD99 and neoplasm: The tumor immunohistochemistry results were B‐cell lymphoma 2 (BCL‐2) positive, focal CD34 +, focal cytoplasmic CD99+, epithelial membrane antigen (EMA) and Panker negative, actin negative, S100 protein‐negative, Papanicolaou and Block cell with a positive result for malignant tumor cells (Figure 2).