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Jibbe A, Worley B, Miller CH, Alam M. Surgical excision margins for fibrohistiocytic tumors, including atypical fibroxanthoma and undifferentiated pleomorphic sarcoma: A probability model based on a systematic review. J Am Acad Dermatol 2021; 87:833-840. [PMID: 34587553 DOI: 10.1016/j.jaad.2021.09.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 08/30/2021] [Accepted: 09/04/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Mohs micrographic surgery or wide local excision is the treatment of choice for fibrohistiocytic tumors with metastatic potential, including atypical fibroxanthoma (AFX) and cutaneous undifferentiated pleomorphic sarcoma (cUPS). Since margin clearance is the strongest predictor of clinical recurrence, improved recommendations for appropriate surgical margins help delineate uniform excision margins when intraoperative margin assessment is not available. OBJECTIVE To determine appropriate surgical wide local excision margins for AFX and cUPS. METHODS Literature search (Ovid MEDLINE, Embase, Web of Science, and Cochrane Library from inception to March 2020) to detect case-level data. Estimation of margins required using a mathematical model based on extracted cases without recurrences. RESULTS Probabilistic modeling based on 100 cases extracted from 37 studies showed peripheral clearance margin (ie, wide local excision margin) calculated to clear 95% of all tumors was 2 cm for AFX and 3 cm for cUPS. AFX tumors 1 cm or less required a margin of 1 cm. LIMITATIONS Data were extracted from published cases. CONCLUSIONS Atypical fibroxanthoma removed with at least a 2-cm peripheral excision margin is less likely to recur. Smaller tumors 1 cm or less can be treated with a more conservative margin. Margin-control surgical techniques are recommended to ensure complete removal while minimizing surgical morbidity.
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Affiliation(s)
- Atieh Jibbe
- Division of Dermatology, Department of Internal Medicine, University of Kansas, Kansas City, Kansas
| | - Brandon Worley
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois; Florida Dermatology and Skin Cancer Centers, Lake Wales, Florida
| | - Corinne H Miller
- Galter Health Sciences Library & Learning Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Murad Alam
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois; Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois; Department of Otoloaryngology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.
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Rosenfeld DJ, Cappel MA, Tolkachjov SN. Cutaneous mesenchymal tumors treated with Mohs micrographic surgery: a comprehensive review. Int J Dermatol 2021; 60:1334-1342. [PMID: 33715156 DOI: 10.1111/ijd.15500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 11/23/2020] [Accepted: 02/08/2021] [Indexed: 12/20/2022]
Abstract
Cutaneous mesenchymal tumors (CMT) are rare tumors with wide clinicopathologic heterogeneity. Treatment of malignant cutaneous mesenchymal tumors traditionally includes wide local excision (WLE), though Mohs micrographic surgery (MMS) has been increasingly used. A PubMed literature review of articles from inception until September 2019 related to malignant CMT and surgical treatment with MMS or WLE was completed. Dermatofibrosarcoma protuberans treated with MMS recurred in 1.2% of patients with no reported metastasis. Atypical fibroxanthoma treated with MMS recurred and metastasized in 2.7 and 2.5%, respectively. Undifferentiated pleomorphic sarcoma treated with MMS recurred in 32% with an unknown metastatic rate. Superficial leiomyosarcoma treated with MMS recurred in 3.8% with no reported metastasis. Cutaneous angiosarcoma and myofibrosarcoma treated with MMS have shown no recurrence or metastatic disease, but literature is sparse. The rarity of malignant CMT and the lack of comparative data on treatment make conclusive treatment recommendations difficult. However, recent literature suggests MMS is a useful option and potentially a superior treatment for primary cutaneous mesenchymal tumors.
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Affiliation(s)
- David J Rosenfeld
- Department of Dermatology, Loyola University Medical Center, Maywood, IL, USA
| | - Mark A Cappel
- Dermatopathology, Gulf Coast Dermatopathology Laboratory Dermatology, Dermatology Associates of Tampa Bay, Tampa, FL, USA
| | - Stanislav N Tolkachjov
- Dermatology and Mohs Micrographic and Reconstructive Surgery, Epiphany Dermatology, Dallas, TX, USA
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Tolkachjov SN, Kelley BF, Alahdab F, Erwin PJ, Brewer JD. Atypical fibroxanthoma: Systematic review and meta-analysis of treatment with Mohs micrographic surgery or excision. J Am Acad Dermatol 2018; 79:929-934.e6. [PMID: 29981390 DOI: 10.1016/j.jaad.2018.06.048] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/16/2018] [Accepted: 06/22/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND Atypical fibroxanthoma (AFX) is a fibrohistiocytic tumor with relatively high local recurrence rates but low metastatic potential. Wide local excision (WLE) and Mohs micrographic surgery (MMS) are common treatments, although no consensus exists regarding optimal therapy. OBJECTIVE To systematically review evidence of AFX recurrence and metastatic rates after different surgical modalities. METHODS A comprehensive search was performed for articles published from 1946 or database inception to March 20, 2017. Studies selected included those that had 5 or more patients with atypical fibroxanthoma treated surgically. Two reviewers independently abstracted the data. Risk of bias was assessed with the Newcastle-Ottawa scale. Main outcomes and measures included recurrence and metastasis. RESULTS In total, 23 studies were selected (907 patients and 914 tumors); 175 patients were treated with MMS (recurrence rate 2.0%, 95% confidence interval [CI] 0%-4.1%; metastatic rate 1.9%, 95% CI 0.1%-3.8%), and 732 were treated with WLE (recurrence rate 8.7%, 95% CI 5%-12.3%; metastasis rate 1%, 95% CI 0.2%-1.9%). Among immunocompromised patients, no recurrence or metastases developed in the MMS subgroup, although 4 of 10 recurred and 1 of 10 metastasized in the WLE subgroup. LIMITATIONS Low quality of the studies published. CONCLUSION MMS for atypical fibroxanthoma is associated with a lower recurrence rate than WLE.
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Affiliation(s)
| | | | - Fares Alahdab
- Mayo Evidence-Based Practice Center, Mayo Clinic, Rochester, Minnesota
| | - Patricia J Erwin
- Knowledge and Evaluation Research Unit, Mayo Clinic, Rochester, Minnesota
| | - Jerry D Brewer
- Division of Dermatologic Surgery, Mayo Clinic, Rochester, Minnesota
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Chen ELA, Srivastava D, Nijhawan RI. Mohs Micrographic Surgery: Development, Technique, and Applications in Cutaneous Malignancies. Semin Plast Surg 2018; 32:60-68. [PMID: 29765269 DOI: 10.1055/s-0038-1642057] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Mohs micrographic surgery (MMS) is a specialized technique for treating skin malignancies that offers the highest cure rate by allowing histological evaluation of the entire peripheral and deep margins. MMS also maximally preserves as much uninvolved, normal adjacent tissue as possible, allowing for the best cosmetic and functional outcomes. When used for appropriate indications, this technique is also more cost-effective than other treatment modalities. In this article, the authors will discuss the development of MMS, the steps involved in this procedure, and the indications for this technique. They will also review the use of MMS for basal cell carcinoma, squamous cell carcinoma, melanoma in situ, and some less common skin malignancies.
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Affiliation(s)
- Eillen Luisa A Chen
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Divya Srivastava
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Rajiv I Nijhawan
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, Texas
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Recurrent conjunctival atypical fibroxanthoma in Pigmentosum Xeroderma. ACTA ACUST UNITED AC 2017; 93:97-100. [PMID: 28843705 DOI: 10.1016/j.oftal.2017.06.016] [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: 01/26/2017] [Revised: 06/25/2017] [Accepted: 06/26/2017] [Indexed: 11/21/2022]
Abstract
CASE REPORT A 7 year-old boy with Xeroderma Pigmentosum (XP) and who presents a recurrent conjunctival atypical fibroxanthoma after two surgeries. This is the third procedure and the patient is treated with a surgical excision of the tumour and cryotherapy at the surgical bed. Due to the risk of recurrence, topical Mitomycin C 0,02% was added at post-operative care achieving a good clinical outcome. DISCUSSION Surgical exeresis with cryotherapy and topical Mitomycin C is an effective treatment for a case of an atypical fibroxanthoma with a high potential for recurrence and invasion. An ophthalmologic follow-up is required for these patients, as well as general paediatric care and support aids.
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Polcz MM, Sebaratnam DF, Fernández-Peñas P. Atypical fibroxanthoma management: Recurrence, metastasis and disease-specific death. Australas J Dermatol 2017; 59:10-25. [DOI: 10.1111/ajd.12646] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 02/06/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Margit Marisa Polcz
- Skin and Cancer Foundation; Sydney New South Wales Australia
- Department of Medicine; University of Queensland; Brisbane Queensland Australia
| | - Deshan Frank Sebaratnam
- Skin and Cancer Foundation; Sydney New South Wales Australia
- Department of Dermatology; University of Sydney; Sydney New South Wales Australia
| | - Pablo Fernández-Peñas
- Skin and Cancer Foundation; Sydney New South Wales Australia
- Department of Dermatology; University of Sydney; Sydney New South Wales Australia
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Incidence and Clinical Features of Rare Cutaneous Malignancies in Olmsted County, Minnesota, 2000 to 2010. Dermatol Surg 2017; 43:116-124. [PMID: 28027201 DOI: 10.1097/dss.0000000000000936] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The incidence of rare cutaneous malignancies is unknown. Current estimates of rare cutaneous malignancy incidences are based on broad epidemiologic data or single institution experiences, not population-based data. OBJECTIVE To determine the incidence of several rare nonmelanoma skin cancers. MATERIALS AND METHODS The authors conducted a retrospective chart review of a population-based cohort between the years 2000 and 2010. Residents of Olmsted County, Minnesota, who were diagnosed with a biopsy-proven nonmelanoma skin cancer-excluding basal cell carcinoma and squamous cell carcinoma-were included in this study. The primary outcome was tumor incidence. Additionally, the authors extracted patient demographics, tumor characteristics, treatment modalities, and outcomes. RESULTS The age-adjusted and sex-adjusted incidences per 100,000 persons of multiple rare cutaneous malignancies were: atypical fibroxanthoma (1.8), sebaceous carcinoma (0.8), dermatofibrosarcoma protuberans (0.4), microcystic adnexal carcinoma (0.7), eccrine carcinoma (0.4), eccrine porocarcinoma (0.2), and leiomyosarcoma (0.2). CONCLUSION The authors report population-based incidences and clinical characteristics for these rare cutaneous malignancies. The immune status and smoking status of patients and the treatment and outcomes of these tumors are reported. Additional studies in a broader population are needed to further define the epidemiology and outcomes of these malignancies.
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Tongdee E, Touloei K, Shitabata PK, Shareef S, Maranda EL. Keloidal Atypical Fibroxanthoma: Case and Review of the Literature. Case Rep Dermatol 2016; 8:156-63. [PMID: 27462224 PMCID: PMC4943314 DOI: 10.1159/000446343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 04/20/2016] [Indexed: 11/19/2022] Open
Abstract
Keloidal atypical fibroxanthoma (KAF) has recently been categorized as a variant of atypical fibroxanthoma. This paper will emphasize the importance of including KAF in both clinical and histological differential diagnosis of benign and malignant lesions which exhibit keloidal collagen and will also review the current literature on epidemiology, pathogenesis, histology, immunochemistry and treatments.
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Affiliation(s)
- Emily Tongdee
- Florida International University Herbert Wertheim College of Medicine, Miami, Fla., USA
| | - Khasha Touloei
- Broward Health Medical Center, Fort Lauderdale, Fla., USA
| | - Paul K Shitabata
- Department of Pathology, Western University, Pomona, Calif., USA; Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, Calif., USA; Dermatopathology Institute, Torrance, Calif., USA
| | | | - Eric L Maranda
- University of Miami Miller School of Medicine, Miami, Fla., USA
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Nguyen CM, Chong K, Cassarino D. Clear cell atypical fibroxanthoma: a case report and review of the literature. J Cutan Pathol 2016; 43:538-542. [PMID: 26956561 DOI: 10.1111/cup.12696] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 04/27/2015] [Accepted: 07/26/2015] [Indexed: 12/20/2022]
Abstract
Atypical fibroxanthoma (AFX) is a group of cutaneous tumors characterized by a population of fusiform, epithelioid and pleomorphic cells. Clinically, AFX is commonly found on the head and neck of older adults as a solitary ulcerated nodule. Clear cell atypical fibroxanthoma is a very rare variant of AFX, with only 13 cases reported to date. The differential diagnoses often include dermal neoplasms composed of clear cells, such as squamous cell carcinoma, basal cell carcinoma, metastatic renal cell carcinoma and balloon cell malignant melanoma. These diagnoses can be ruled out by the typical immunohistochemical profile of clear cell AFX, which is negative for specific epithelial and melanocytic markers. Herein, we describe a rare and unusual case of clear cell AFX arising on the ear of a relatively young adult patient. Histologically, the dermis was completely replaced by an atypical population of vacuolated cells with numerous atypical mitoses. Immunohistochemical stains were negative forpancytokeratin, CK5/6, CK7, and p63 S100 and Melan-A stains. CD10 and CD68 stains were positive, making the findings consistent with the diagnosis of clear cell atypical fibroxanthoma.
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Affiliation(s)
| | - Kim Chong
- Department of Dermatology, Kaiser Permanente, Sunset Medical Center, Los Angeles, CA, USA
| | - David Cassarino
- Department of Dermatology, Kaiser Permanente, Sunset Medical Center, Los Angeles, CA, USA
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Abstract
Atypical fibroxanthoma (AFX) is an ultraviolet radiation-associated dermal neoplasm. To address the clinicopathologic and molecular features of this particular neoplasm. The author conducted a literature review using PubMed searching for articles relating to AFX. AFX usually appears as a rapidly growing nodular or nodulo-ulcerative lesion. It occurs on sun-exposed skin of elderly peoples. AFX may be composed predominantly of pleomorphic, spindle, epithelioid cells, or admixture of these cells. The differential diagnosis of AFX includes pleomorphic dermal sarcoma, squamous cell carcinoma, malignant melanoma and leiomyosarcoma. Several observations favor a mesenchymal origin for AFX. These reviews address the clinicopathologic features, molecular pathology, prognosis and treatment of this neoplasm.
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Hollmig TS, Sachdev R, Cockerell CJ, Posten W, Chiang M, Kim J. Spindle Cell Neoplasms Encountered in Dermatologic Surgery: A Review. Dermatol Surg 2012; 38:825-50. [DOI: 10.1111/j.1524-4725.2012.02296.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Management of Unusual Cutaneous Malignancies: Atypical Fibroxanthoma, Malignant Fibrous Histiocytoma, Sebaceous Carcinoma, Extramammary Paget Disease. Dermatol Clin 2011; 29:201-16, viii. [DOI: 10.1016/j.det.2011.02.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abstract
Atypical fibroxanthoma (AFX) is an unusual spindle cell tumor occurring on actinically damaged skin of the head and neck. Clinically, it is often confused with basal cell carcinoma, squamous cell carcinoma, or even melanoma. Although initially thought to be a diagnosis of exclusion histologically, newer immunostains have helped in the identification of AFX. Mohs micrographic surgery has been utilized for the treatment due to its tissue sparing ability along with lower recurrence rate.
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Affiliation(s)
- Steven Marcet
- Newnan Dermatology, Newnan, Georgia 30263-2384, USA.
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Abstract
Atypical fibroxanthoma (AFX) is a nodular dermal ulcerative lesion with a favorable prognosis. AFX most commonly occurs on sun-exposed skin in elderly individuals. AFX is characterized by its association with ultraviolet radiation, not only from a clinical aspect, but also from a molecular aspect. Making a diagnosis of AFX is challenging, and it is important to differentiate it from squamous cell carcinoma and malignant melanoma. Histological features and combined immunohistochemical markers are necessary for a definitive diagnosis (i.e., an absence of immunostaining for cytokeratins, S100 and HMB45 in AFX is helpful for excluding both squamous cell carcinoma and malignant melanoma). AFX, as well as MFH (malignant fibrous histiocytoma), is a fibrohistiocytic lesion with myofibroblastic differentiation. AFX is considered to be a different lesion from MFH. AFX and MFH might share the same pathway which determines their morphology. However, they may have different pathways in development which determine their biological behavior.
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Affiliation(s)
- Akio Sakamoto
- Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Abstract
BACKGROUND Solid organ transplant recipients have an increased incidence of multiple cutaneous neoplasms. OBJECTIVE We hope to draw attention to the potential risk for organ transplant recipients to develop atypical fibroxanthomas. METHODS A review of the patient's medical record was performed and summarized as a case report. RESULTS We present the case of a cardiac transplant recipient who developed three atypical fibroxanthomas. This is the first reported case of multiple atypical fibroxanthomas in an organ transplant recipient. CONCLUSION Atypical fibroxanthomas are uncommon cutaneous malignancies for which transplant recipients may be at increased risk.
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Affiliation(s)
- Bradley T Kovach
- Division of Dermatology, Vanderbilt University, Nashville, Tennessee 37232-5227, USA
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Atypical Fibroxanthoma. Dermatol Surg 2006. [DOI: 10.1097/00042728-200603000-00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gómez de la Fuente E, Sols M, Pinedo F, Alvarez-Fernández JG, Vicente FJ, Naz E, López-Estebaranz JL. Fibroxantoma atípico. Estudio clinicopatológico de 10 casos. ACTAS DERMO-SIFILIOGRAFICAS 2005; 96:153-8. [PMID: 16476356 DOI: 10.1016/s0001-7310(05)73057-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
INTRODUCTION Atypical fibroxanthoma (AFX) is a rare tumor of unknown histogenesis, considered by most authorities as a superficial form of malignant fibrous histiocytoma (MFH). The aim of this work is to report the clinicopathological features of 10 cases of AFX. MATERIAL AND METHODS Data were retrospectively collected of the computerized medical history. Clinical (age, onset-diagnosis time, location, accompanying pathology, outcome), histological (architectural pattern, cell type, ulceration, vascular or perineural invasion, subcutis involvement, pleomorphism, mitosis, inflammatory infiltrate) and immunohistochemical variable were analyzed. CASES REPORT Clinical and epidemiological features coincide with those previously reported: onset late in life, short time onset-diagnosis, involvement of skin with notable sun damage and a good outcome. Pathologically all the cases showed a spindle-cell prevalence arranged in a vaguely storiform pattern, along with both, multinucleated and eosinophilic cells. DISCUSSION The diagnosis of AXF is always of exclusion. Other spindle-cell tumors such as squamous cell carcinoma, malignant melanoma, leyomiosarcoma or dermatofibrosarcoma protuberans must be ruled out by immunohistochemical techniques. In spite of its rarity, the recognition of AFX is important in order to avoid inappropriately aggressive treatment.
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Abstract
BACKGROUND Atypical fibroxanthoma is a rare cutaneous spindle cell neoplasm typically found on the sun-exposed areas of the head or neck of the elderly. OBJECTIVE We report a case of localized cutaneous metastases attributed to an atypical fibroxanthoma. METHODS A case report and a review of the literature of metastasizing atypical fibroxanthoma are given. RESULTS Mohs micrographic surgery was used to treat all skin lesions and currently the patient has no suspicious lesions. CONCLUSION Metastases attributed to atypical fibroxanthoma are rare, and many prior reports may have actually been malignant fibrous histiocytoma, spindle cell melanoma, or spindle cell squamous carcinoma. Tumor depth, vascular invasion, and cutaneous tumor recurrence appear to increase risk for metastasis.
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Affiliation(s)
- T J Giuffrida
- Dermatology and Skin Cancer Specialists, Leawood, Kansas 66211, USA
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Affiliation(s)
- Suneel Chilukuri
- Department of Dermatology, Baylor College of Medicine, Houston, Texas, USA
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CHILUKURI SUNEEL, ALAM MURAD, H. GOLDBERG LEONARD. Two Atypical Fibroxanthomas of the Ear. Dermatol Surg 2003. [DOI: 10.1097/00042728-200304000-00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Huether MJ, Zitelli JA, Brodland DG. Mohs micrographic surgery for the treatment of spindle cell tumors of the skin. J Am Acad Dermatol 2001; 44:656-9. [PMID: 11260542 DOI: 10.1067/mjd.2001.112381] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Because of the uncommon nature of dermal spindle cell tumors, the effectiveness of various treatment modalities is difficult to assess. OBJECTIVE Our purpose was to measure the effectiveness of treating dermatofibrosarcoma protuberans, atypical fibroxanthoma, malignant fibrous histiocytoma, and leiomyosarcoma by means of Mohs micrographic surgery (MMS). In addition, we attempted to determine whether MMS is useful in treating dermal spindle cell tumors when no definitive histopathologic diagnosis can be rendered. METHODS In a retrospective chart review, demographic data, tumor data, treatment characteristics, recurrence, and follow-up data were tabulated. RESULTS The recurrence rate for dermatofibrosarcoma protuberans treated by MMS was 3.0%, for atypical fibroxanthoma was 6.9%, for malignant fibrous histiocytoma was 43%, and for leiomyosarcoma was 14%. The recurrence rate for spindle cell tumors not otherwise specified was 0%. CONCLUSION These data establish the effectiveness of MMS in the treatment of dermal spindle cell tumors, including those for which no definitive histopathologic diagnosis can be rendered.
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