The history of a 6-year-old girl with a tumor originating from thoracic spine and finally becoming resistant to surgery, radio-, and chemotherapy is reported. Tumor-biopsy material was studied by light and electron microscopy, in cell culture, by acetylcholinesterase ultracytochemistry, and by
Neuroblastoma is often confused histologically with other small round cell tumors such as Ewing's sarcoma, acute lymphocytic leukemia, lymphoma, and oat cell carcinoma, particularly at metastatic sites. Studies were performed to evaluate glyoxylic acid-induced catecholamine fluorescence as a rapid