Minute synovial sarcomas of the hands and feet: a clinicopathologic study of 21 tumors less than 1 cm.
Sikl's Department of Pathology, Faculty Hospital, Pilsen, Czech Republic, and the Department of Soft Tissue Pathology, Armed Forces Institute of Pathology, Washington, DC 20306-6000, USA. American Journal of Surgical Pathology
(Impact Factor: 5.15).
Synovial sarcoma, one of the most common types of soft tissue sarcomas, usually presents in the proximal or middle portions of the extremities, often as a large mass with an aggressive clinical behavior. Gland-forming biphasic and spindle cell fibrous monophasic tumors are the most common subtypes. In this study, we evaluated 21 minute synovial sarcomas, <1 cm in diameter, from the hands and feet. These tumors occurred in 14 females and 7 males with a median age of 29 years (range, 8-60 years). Clinically, all tumors were thought to be benign processes such as a ganglion cyst or glomus tumor, and on microscopic examination, they were also often initially misinterpreted as benign lesions such as nerve sheath or (myo) fibroblastic tumors. Histologically, 7 tumors were biphasic and 14 were monophasic spindle cell variants. Microscopic calcifications were present in 8 cases and were prominent in 3 tumors. All monophasic tumors tested had elements positive for EMA, and all but one had reactivity for a keratin cocktail. S-100 protein-positive neuroma-like neural proliferations were commonly present in the monophasic but not in biphasic tumors. SYT-SSX fusion transcripts were demonstrated in 5 cases studied by polymerase chain reaction assay. All tumors were enucleated, followed by local reexcision of the site, and often combined with postoperative radiation. Three patients had amputation of the involved digit or metatarsal. Four patients had local recurrences, 2 of which were successfully treated; 2 of these patients were lost to follow-up. Despite some variation in treatment, all 12 patients with complete follow-up were alive and well, 2 to 32.2 years after surgery (median, 14.7 years), including 2 patients who received neither amputation nor postoperative radiation. Minute synovial sarcomas of hands and feet are clinically favorable tumors if completely excised; there is some evidence to suggest that they may be managed more conservatively than larger tumors. These tumors should be recognized as part of the spectrum of synovial sarcomas.
Available from: Brent D Kerger
- "Synovial sarcoma is a relatively rare malignancy that typically occurs in adolescents and young adults between the ages of 15 and 50 years of age and most commonly affects the extremities in the vicinity of large joints such as the knee or the thigh (Cadman et al., 1965; Cordon-Cardo, 1997; Nicholson et al., 1998; Cappello and Barnes, 2001; Kumar et al., 2005c) and the hands or feet (Michal et al., 2006). Because synovial sarcoma can be difficult to distinguish from reactive mesothelial proliferation and sarcomatoid mesothelioma by use of histology and immunohistochemical markers alone (Shiraki et al., 1989; Moran et al., 1992; Nicholson et al., 1998; Miettinen et al., 2001; Carbone et al., 2002; Gladish et al., 2002; Vohra et al., 2004; Taylor et al., 2005; Michal et al., 2006; Rdzanek et al., 2006), it represents another alternative carcinoma to consider when evaluating suspected sarcomatoid mesothelioma cases. "
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ABSTRACT: The diagnosis of mesothelioma is not always straightforward, despite known immunohistochemical markers and other diagnostic techniques. One reason for the difficulty is that extrapleural tumors resembling mesothelioma may have several possible etiologies, especially in cases with no meaningful history of amphibole asbestos exposure. When the diagnosis of mesothelioma is based on histologic features alone, primary mesotheliomas may resemble various primary or metastatic cancers that have directly invaded the serosal membranes. Some of these metastatic malignancies, particularly carcinomas and sarcomas of the pleura, pericardium and peritoneum, may undergo desmoplastic reaction in the pleura, thereby mimicking mesothelioma, rather than the primary tumor. Encasement of the lung by direct spread or metastasis, termed pseudomesotheliomatous spread, occurs with several other primary cancer types, including certain late-stage tumors from genetic cancer syndromes exhibiting chromosomal instability. Although immunohistochemical staining patterns differentiate most carcinomas, lymphomas, and mestastatic sarcomas from mesotheliomas, specific genetic markers in tumor or somatic tissues have been recently identified that may also distinguish these tumor types from asbestos-related mesothelioma. A registry for genetic screening of mesothelioma cases would help lead to improvements in diagnostic criteria, prognostic accuracy and treatment efficacy, as well as improved estimates of primary mesothelioma incidence and of background rates of cancers unrelated to asbestos that might be otherwise mistaken for mesothelioma. This information would also help better define the dose-response relationships for mesothelioma and asbestos exposure, as well as other risk factors for mesothelioma and other mesenchymal or advanced metastatic tumors that may be indistinguishable by histology and staining characteristics.
Frontiers in Genetics 05/2014; 5:151. DOI:10.3389/fgene.2014.00151
Available from: Michal Zamecnik
- "Small sarcomas of various types are well known for having a relatively good circumscription. This is true for example in minute synovial sarcomas of the hands and feet  and small superficial epithelioid sarcomas as well as small alveolar soft part sarcomas in the tongue and endocervix. We found no light microscopical or immunohistochemical evidence of melanocytic, endothelial, smooth muscle, rhabdomyoblastic, myofibroblastic or mesothelial differentiation. "
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ABSTRACT: A 30-year-old male with no previous history of neoplastic disease presented with a 5 cm large testicular tumor. Routine histopathological examination and immunohistochemical investigation showed a classical seminoma with a contiguous 8 mm large nodule. The nodule was separated from the tunica albuginea by tubuli seminiferi showing intratesticular germ cell neoplasi not otherwise specified (NOS). The nodule was composed of spindle cells with low-grade nuclear atypia, nuclear and cytoplasmic S100 protein immunoreactivity in 15% of the cells and a proliferative activity of up to 20%. No other germ cell tumor components were found. To the best of our knowledge, we herein present the first tumor of a pure classical seminoma with an associated low-grade sarcomatous component.
International journal of clinical and experimental pathology 01/2009; 3(2):203-9. · 1.89 Impact Factor
Ground Penetrating Radar, 2004. GPR 2004. Proceedings of the Tenth International Conference on; 02/2004
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