In a reported case of pulmonary papillary adenoma in a 16-year-old Japanese female, the expression levels of fibroblast growth factor 10 (FGF10), keratinocyte growth factor (KGF) and fibroblast growth factor receptor 2 IIIb (FGFR2 IIIb) were detected using immunohistochemistry, in situ hybridization and real-time reverse transcription-polymerase chain reaction, and FGFR2 IIIb was found to be overexpressed in the tumor tissue, suggesting that it may play an important role in the process of tumor formation [4]. The gene discussed is FGF7; the disease is neoplasm.