IL6 and neoplasm: Analysis of datasets where tumor stroma was separated from tumor epithelium [17, 26], showed that in some ER + ILC tumors there was an increase in stromal expression of IL6 relative to the tumor epithelium compared to ER + NST tumors (Fig. 2H) suggesting that IL6 may be more highly expressed by the stromal compartment of ILC than NST tumors.