However, subsequent studies using immunohistochemical techniques and electron microscopy have shown that SFT originates from dendritic mesenchymal cells that are CD34-positive and capable of differentiating into fibroblasts, myofibroblasts, and vascular epithelial cells.[5–7] Although SFT can occur in various locations in the body, primary bladder SFT is rare, and patients may present with urinary symptoms and pelvic compression or be asymptomatic. The gene discussed is CD34; the disease is solitary fibrous tumor.