CD117, or p145kit, is found on a wide variety of tumor cells including follicular and papillary carcinoma of thyroid, adenocarcinomas from endometrium, lung, ovary, pancreas, and breast as well as malignant melanoma, endodermal sinus tumor, and small cell carcinoma. CD117 antibody has been particularly useful in differentiating gastrointestinal stromal tumors from Kaposi’s sarcoma, tumors of smooth muscle origin, fibromatosis, and neural tumors of the GI tract.

Store the CD117 antibody at 2-8°C (with azide) or aliquot and store at -20°C or colder (without azide).