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Ramalhosa F, Pezzuto F, Fortarezza F, Canu G, Biondini D, Faccioli E, Polverosi R, Giraudo C, Calabrese F. Endobronchial solitary fibrous tumors: An enigma for diagnosis. Pathol Res Pract 2024; 256:155240. [PMID: 38492357 DOI: 10.1016/j.prp.2024.155240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 03/18/2024]
Abstract
Solitary fibrous tumors (SFTs) are rare mesenchymal neoplasms constituting less than 2% of all soft tissue tumors. They typically originate in the thoracic cavity, mainly in the pleura, but can also occur in other various sites such as lung parenchyma, pericardium, and bronchus. In this study, a 49-year-old non-smoking female with a history of allergies presented to our pulmonary clinic with a chronic cough. An explorative bronchoscopy revealed an intrabronchial mass in the left superior bronchi, and a 68 Ga-DOTATOC positron emission computed tomography suggested a carcinoid tumor. Subsequent pulmonary segmentectomy unveiled a well-circumscribed polypoid lesion diagnosed as a low-grade bronchus SFT through histopathological and immunohistochemical assessments. The patient was asymptomatic after surgical excision and showed no other lesion during the 6-month follow-up. The endobronchial location of SFT is uncommon, with only a few reported cases in the literature, underscoring the necessity of considering various differential diagnoses, including carcinoid, mucoepidermoid carcinoma, endobronchial pleomorphic adenoma, hamartoma, leiomyoma, and metastasis, depending on location and imaging features. This report underscores the importance of careful histological and immunohistochemical evaluation in understanding and appropriately stratifying the risk associated with polypoid lesions.
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Affiliation(s)
- Fátima Ramalhosa
- Centro Hospitalar e Universitário de Coimbra, Praceta Professor Mota Pinto, Coimbra 3004-561, Portugal
| | - Federica Pezzuto
- Department of Cardia, Thoracic, Vascular Science, and Public Health, University of Padova, Padova 35121, Italy
| | | | - Gianluca Canu
- Department of Cardia, Thoracic, Vascular Science, and Public Health, University of Padova, Padova 35121, Italy
| | - Davide Biondini
- Department of Cardia, Thoracic, Vascular Science, and Public Health, University of Padova, Padova 35121, Italy
| | - Eleonora Faccioli
- Department of Cardia, Thoracic, Vascular Science, and Public Health, University of Padova, Padova 35121, Italy
| | | | - Chiara Giraudo
- Department of Cardia, Thoracic, Vascular Science, and Public Health, University of Padova, Padova 35121, Italy
| | - Fiorella Calabrese
- Department of Cardia, Thoracic, Vascular Science, and Public Health, University of Padova, Padova 35121, Italy.
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Kundu U, Gan Q, Donthi D, Sneige N. The Utility of Fine Needle Aspiration (FNA) Biopsy in the Diagnosis of Mediastinal Lesions. Diagnostics (Basel) 2023; 13:2400. [PMID: 37510144 PMCID: PMC10378189 DOI: 10.3390/diagnostics13142400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/22/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
Fine needle aspiration is a minimally invasive, low-morbidity, and cost-efficient technique for the sampling of mediastinal lesions. Additionally, ancillary testing on FNA samples can be used for the refinement of diagnoses and for treatment-related purposes (flow cytometry, cytogenetics, immunohistochemistry, and molecular diagnostics). Mediastinal lesions, however, can show a variety of lineages and morphologic features, giving rise to diagnostic dilemmas. As a result, the differential diagnosis can vary widely and becomes especially challenging due to the smaller sample size on FNA and the variability in component sampling. For appropriate patient management and to determine the correct treatment strategies, accurate pathologic diagnoses are paramount. In this review, we present the cytomorphologic features together with the immunophenotypic findings of mediastinal lesions, with emphasis on the diagnostic challenges and pitfalls in FNA cytology samples, including smears and cell block sections.
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Affiliation(s)
- Uma Kundu
- Section of Cytopathology, Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Qiong Gan
- Section of Cytopathology, Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Deepak Donthi
- Section of Cytopathology, Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Nour Sneige
- Section of Cytopathology, Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Lin C, Yu X. Magnetic resonance imaging features of a solitary fibrous tumor of the vulva: a case report. J Int Med Res 2022; 50:3000605221112201. [PMID: 35899898 PMCID: PMC9340956 DOI: 10.1177/03000605221112201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Solitary fibrous tumors (SFTs) are commonly seen in the pleura. SFT involvement of the vulva is rare, and clinical diagnosis is mainly based on histopathological and immunohistochemical analyses. We herein describe the imaging features of a 69-year-old woman with an SFT of the vulva. The SFT was hypointense on T1-weighted images, similar to muscle; however, it showed inhomogeneous hyperintensity predominantly on fat-suppressed T2-weighted images. An area of low signal intensity was evident on T2-weighted images, and the tumor showed progressive enhancement in delayed phases. The tumor also displayed heterogeneous and prolonged, persistent enhancement, and serpentine vessels were present in the peritumoral area as signal voids. Pathological examination confirmed that the lesion was an atypical SFT originating from the vulva, and it was composed of spindle cells and perivascular and stromal hyalinization. This case reveals the characteristic imaging findings of vulvar SFT and their association with the relevant pathological findings, thus contributing to the primary diagnosis and preoperative evaluation of this potentially aggressive tumor.
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Affiliation(s)
- Chuxin Lin
- Department of Radiology, Zhuhai Hospital Affiliated with Jinan University (Zhuhai People's Hospital), Zhuhai, China
| | - Xiangrong Yu
- Department of Radiology, Zhuhai Hospital Affiliated with Jinan University (Zhuhai People's Hospital), Zhuhai, China
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Stewart BD, VandenBussche CJ, Leon ME. Benign lesions of the mediastinum: A review with emphasis on cytology and small biopsy specimens. Semin Diagn Pathol 2020; 37:199-210. [PMID: 32534865 DOI: 10.1053/j.semdp.2020.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 04/01/2020] [Indexed: 01/03/2023]
Abstract
This review focuses on the diagnosis of select benign processes, ranging from reactive entities to heterotopic tissues to neoplasms, which may occur in the mediastinum. Currently, the mediastinum can be evaluated and biopsied with endoscopic procedures. Therefore, cytopathology specimens, fine needle aspirations, and small biopsies play an important role in the diagnosis of these lesions. In this review, an emphasis is given to relevant clinical presentations, histologic and cytologic findings, differential diagnoses, ancillary testing, and interpretation. Pitfalls are reviewed and discussed in each section. It is important for both surgical pathologists and cytopathologists to be familiar with these entities and their cytologic and histologic features that may be helpful in reaching a diagnosis.
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Affiliation(s)
- Brian D Stewart
- University of Florida College of Medicine Department of Pathology, Immunology and Laboratory Medicine P.O. Box 100275 1600 SW Archer Road Gainesville, FL 32610-0275.
| | - Christopher J VandenBussche
- Johns Hopkins University School of Medicine, Department of Pathology, 600 N. Wolfe Street Baltimore, MD 21287
| | - Marino E Leon
- University of Florida College of Medicine Department of Pathology, Immunology and Laboratory Medicine P.O. Box 100275 1600 SW Archer Road Gainesville, FL 32610-0275
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Hupp M, Najmuddin M, Dincer HE, Mallery JS, Amin K, Stewart J. Cytomorphologic features of malignant solitary fibrous tumor with mediastinal involvement sampled by endoscopic and endobronchial ultrasound-guided fine-needle aspiration: A comparison of two cases. Diagn Cytopathol 2019; 47:821-827. [PMID: 31016889 DOI: 10.1002/dc.24192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 03/29/2019] [Accepted: 04/03/2019] [Indexed: 11/09/2022]
Abstract
Solitary fibrous tumor (SFT) is an uncommon fibroblastic neoplasm with considerable risk of local recurrence. SFT is histologically characterized by bland spindled-to-epithelioid cells in alternating hyper- and hypocellular zones, a "patternless pattern," ectatic "staghorn" vessels with variable edematous perivascular stroma, and thick ropey collagen. Cytologically, smears are variably cellular with spindled-to-epithelioid cells with oval nuclei, wispy cytoplasm, multiple inconspicuous nucleoli, and occasional nuclear pseudoinclusions. Small vessels and bare/stripped nuclei are generally present while mild atypia is not uncommon. STAT6 nuclear expression is the most useful immunohistochemical stain and is the product of a NAB2-STAT6 gene fusion. SFTs with mediastinal involvement may be diagnostically challenging due to proximity to vital structures and anticipated patient risks. Endobronchial and endoscopic ultrasound-guided fine-needle aspiration (EBUS/EUS-FNA) are minimally-invasive tissue sampling methods that provide diagnostic material while minimizing patient risk, and the mediastinum is accessible by both procedures. Small aspirate samples and SFT nonspecific features can compound the diagnostic difficulty, although familiarity with the cytologic, morphologic, immunophenotypic, and genetic features of SFTs assist the pathologist in confirming the diagnosis. Pathologists must also be aware of high-risk SFT features to ensure appropriate therapy and management. Case #1 describes a recurrent mediastinal SFT with high-risk features sampled by EUS-FNA. Case #2 describes a primary diagnosis of mediastinal SFT with malignant behavior made on an EBUS-FNA specimen.
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Affiliation(s)
- Meghan Hupp
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Mufaddal Najmuddin
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Huseyin Erhan Dincer
- Department of Pulmonary, Critical Care and Sleep Medicine, University of Minnesota, Minneapolis, Minnesota
| | - James Shawn Mallery
- Department of Gastroenterology, Hepatology and Nutrition, University of Minnesota, Minneapolis, Minnesota
| | - Khalid Amin
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Jimmie Stewart
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
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