Localized Fibrous Tumors of the Pleura: Clinical and Surgical Evaluation

Galbis-Caravajal, José M.; Badía, J.G. Sales; Hervás, M. Navarro; Madueño, J.J. Mafé; Rodríguez, P. Cordero; Paniagua, J.M. Rodríguez

doi:10.1016/s1579-2129(06)60346-7

Cited by 5 publications

(2 citation statements)

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“…Size (> 8 cm), necrosis, and hemorrhage, as well as nuclear pleomorphism and high mitotic rate, have been considered important for prognosis in pleural-based SFT, although the absence of such features does not guarantee benign behavior. 23,[32][33][34][35][36][37][38][39][40] Conversely, the presence of such features also does not universally imply malignancy. 51 With regard to tumor size, 7 patients in our study presented with masses >8 cm in greatest diameter.…”

Section: Discussionmentioning

confidence: 99%

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Intrapulmonary Solitary Fibrous Tumors

Rao

Colby

Falconieri

et al. 2013

American Journal of Surgical Pathology

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Solitary fibrous tumor (SFT) is a ubiquitous neoplasm that arises most commonly from the pleura. SFT arising within lung parenchyma (intrapulmonary SFT) has been rarely reported and is therefore not well recognized. We present a clinicopathologic and immunohistochemical study of 24 cases of primary intrapulmonary SFT. Patients' ages ranged from 44 to 83 years (mean, 58 y). None of the patients had evidence or history of a similar tumor elsewhere. Tumor size ranged from 2.3 to 22 cm (mean, 8.5 cm). On the basis of the degree of cytologic atypia, cellularity, mitotic activity, and areas of necrosis, the lesions were divided into low-grade, intermediate-grade, and high-grade histology. Twenty-one tumors showed the conventional features of SFT of low-grade histology (<5 mitoses per 10 high-power fields), with alternating bands of rope-like collagen flanked by a bland-appearing spindle cell proliferation. Hemangiopericytic, angiofibromatous, and a neural-like plexiform growth pattern were also observed. Five of 21 cases showed an "adenofibromatous" appearance imparted by entrapped normal airspaces at the advancing edges of the lesion. One intermediate-grade tumor showed overall increased cellularity with plump, pleomorphic nuclei, 5 to 10 mitoses per 10 high-power fields, and focal areas of classic SFT. Two cases showed high-grade features at initial presentation, with areas resembling a pleomorphic high-grade sarcoma admixed with foci of conventional, low-grade SFT. Immunohistochemical staining analyses performed in 13 cases showed positivity of the tumor cells for CD34, bcl-2, and CD99 in the majority of cases tested. Clinical follow-up was available in 18 patients, with long-term follow-up (>5 y) in 6. Fourteen (14/18) patients were alive and well without evidence of disease 1 month to 14 years after initial diagnosis. Three patients died of their tumors after 4, 5, and 7 years; in 2 of them the initial tumor was of low-grade histology, but the recurrence/metastases showed a high-grade histology; the third fatal case showed a tumor with high-grade histology at initial diagnosis. One patient with intermediate-grade histology also had chest wall metastases at 5 years but was subsequently lost to follow-up. The results of our study indicate that although tumors with overtly malignant histologic features can be expected to behave as high-grade sarcomas, tumors with bland-appearing morphologic features at presentation may also follow an aggressive behavior. Adequate excision with close clinical follow-up, thus, appears to be the most prudent course of action for the management of primary intrapulmonary fibrous tumors.

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Section: Discussionmentioning

confidence: 99%

“…Although several features have been associated with aggressive behavior, the clinical behavior of these tumors remains unpredictable. [32][33][34][35][36][37][38][39][40] In the case of intrapulmonary SFT, the problem of assessing its clinical behavior has been compounded by the paucity of reported cases.…”

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confidence: 99%