title: Primary pulmonary squamous cell carcinoma associated with elevated IL-6, leukocytosis, hypercalcemia, phagocytosis, reactive lymphadenopathy and glomerular mesangial cell proliferation via the production of PTH-rP and G-CSF.
abstract: We report an autopsied case of a 74-year-old man with primary pulmonary squamous cell carcinoma (SCC) associated with leukocytosis, hypercalcemia, phagocytosis in the bone marrow, reactive lymphadenopathy and mesangial cell proliferation in the glomerulus. Laboratory examination revealed increased serum levels of parathyroid hormone-related peptide (PTH-rP), granulocyte colony stimulating factor (G-CSF), interleukin-6 (IL-6) and soluble interleukin 2 receptor (s-IL2R). An autopsy showed moderately differentiated SCC at the left lower lobe of the lung, of which tumor cells distinctly showed cytoplasmic immunoreactivity to anti-G-CSF and anti-PTH-rP antibodies. Thus, pulmonary SCC seemed to produce both G-CSF and PTH-rP, causing leukocytosis, hypercalcemia, and IL-6 production from the bone. IL-6 also might have stimulated the proliferation of SCC and glomerular mesangial cells, and induced phagocytosis, reactive lymphadenopathy and hepatosplenomegaly by interacting with the mononuclear phagocytic system.
authors.affiliation: Department of Internal Medicine 1, Shimane University Faculty of Medicine, Izumo, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Takaoka
authors.forename: Yuko
authors.initials: Y
authors.lastname: Yamane
authors.forename: Masateru
authors.initials: M
authors.lastname: Nishiki
authors.forename: Toru
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Toshitsugu
authors.initials: T
authors.lastname: Sugimoto
mesh_terms: D000368:Aged; D001344:Autopsy; D002294:Carcinoma, Squamous Cell / Q000097:blood* / Q000150:complications*; D049109:Cell Proliferation; D016179:Granulocyte Colony-Stimulating Factor / Q000096:biosynthesis*; D006801:Humans; D006934:Hypercalcemia / Q000150:complications*; D015850:Interleukin-6 / Q000097:blood*; D007964:Leukocytosis / Q000150:complications*; D008175:Lung Neoplasms / Q000097:blood* / Q000150:complications*; D008206:Lymphatic Diseases / Q000150:complications*; D008297:Male; D050527:Mesangial Cells / Q000473:pathology*; D044162:Parathyroid Hormone-Related Protein / Q000096:biosynthesis*; D010587:Phagocytosis
chemical_list: D015850:Interleukin-6; D044162:Parathyroid Hormone-Related Protein; D016179:Granulocyte Colony-Stimulating Factor