title: [Small renal cell carcinoma presented with pleural metastasis and multiple bone metastasis ; a case report].
abstract: The patient is a 69-year-old male. His chief complaint was chest pain. Because imaging studies suggested pleural mesothelioma associated with multiple bone metastases, right pleural tumor resection was performed. Pathological diagnosis was metastatic pleural tumor, and renal cell carcinoma (RCC) was suspected as its origin. Dynamic computed tomography showed a small tumor in the right kidney. The tumor was 15 mm in diameter and consistent with RCC. Laparoscopic radical nephrectomy was performed for the right kidney. Pathological diagnosis was RCC, clear cell carcinoma with sarcomatoid component, T1aN0M1, stage IV. Sorafenib therapy was started 46 days after the operation as a systemic therapy, and stable disease has been maintained. Generally, small RCC is assumed to have a good prognosis. However, a small percentage of patients with small RCC have distant metastasis at the time of diagnosis, and the prognosis is reported to be poor. We report this case, and a review of the literature.
authors.affiliation: The Department of Renal and Urologic Surgery, Asahikawa Medical University, Japan.
authors.forename: Mizuho
authors.initials: M
authors.lastname: Ohara
authors.forename: Seiji
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Naoki
authors.initials: N
authors.lastname: Wada
authors.forename: Tadasu
authors.initials: T
authors.lastname: Motoya
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Kitahara
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Kakizaki
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Tokusashi
mesh_terms: D000368:Aged; D001859:Bone Neoplasms / Q000556:secondary*; D002292:Carcinoma, Renal Cell / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology* / Q000601:surgery; D008297:Male; D010997:Pleural Neoplasms / Q000556:secondary*