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Maki T, Fujino S, Misu K, Kaneko H, Inomata H, Omi M, Tateno M, Nihei K. Integrally calcified solitary fibrous tumor in the retroperitoneum: a case report and review of the literature. Surg Case Rep 2016; 2:14. [PMID: 26943690 PMCID: PMC4752942 DOI: 10.1186/s40792-016-0143-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 02/11/2016] [Indexed: 12/12/2022] Open
Abstract
Solitary fibrous tumor (SFT) is a rare stromal neoplasm and usually occurs in the thoracic cavity. We here report a case of retroperitoneal SFT with prominent calcification. A 64-year-old man presented with an incidentally detected retroperitoneal mass in the right upper abdomen. Imaging tests indicated an integrally calcified mass. The lesion was observed for 2 years and laparoscopically resected according to the patient's wish. Microscopically, the mass was mostly occupied by calcification and proliferous spindle cells were scattered with positive CD34 expression. We diagnosed morphologically benign SFT and the patient remained disease-free 1 year after the excision. There has been no report of such integrally calcified SFT. Retroperitoneal SFT is difficult to make a preoperative diagnosis, and careful follow-up after the excision is recommended because morphological malignancy does not always correspond to clinical malignancy.
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Affiliation(s)
- Takehiro Maki
- Department of Surgery, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
| | - Syotaro Fujino
- Department of Surgery, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
| | - Kenjiro Misu
- Department of Surgery, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
| | - Hiroyuki Kaneko
- Department of Surgery, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
| | - Hitoshi Inomata
- Department of Surgery, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
| | - Makoto Omi
- Department of Surgery, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
| | - Masatoshi Tateno
- Department of Pathology, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
| | - Kazuyoshi Nihei
- Department of Surgery, Kushiro Red Cross Hospital, 21-14, Shineichyo, Kushiro, Hokkaido, 085-8512, Japan.
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