1
|
Kumar Yadav S, Choudhary A, Kantiwal P, Rao M, Elhence A. Proximal Tibia Primary Leiomyosarcoma: A Case Report and Review of Literature. Cureus 2023; 15:e43712. [PMID: 37724208 PMCID: PMC10505490 DOI: 10.7759/cureus.43712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2023] [Indexed: 09/20/2023] Open
Abstract
The paper at hand presents a unique case of leiomyosarcoma (LMS) involving the left leg in a 56-year-old patient. This individual experienced pain and the presence of a mass for approximately eight months before seeking medical attention. A diagnostic biopsy revealed the presence of multinucleated pleomorphic cells arranged in intersecting fascicles upon immunohistochemistry (IHC) staining for vimentin, caldesmon, and smooth muscle actin. The rarity of LMS in the extremities highlights the need for further understanding and research to determine the most suitable treatment approaches for such patients. In this specific case, the patient underwent tumor excision followed by reconstruction using a megaprosthesis. This report emphasizes the importance of considering unique treatment strategies when dealing with rare neoplasms like LMS in the extremities. As medical knowledge continues to evolve, gaining insights into the optimal management of such cases will be crucial for improving patient outcomes and overall prognosis.
Collapse
Affiliation(s)
| | - Aakash Choudhary
- Orthopaedics, All India Institute of Medical Sciences, Jodhpur, IND
| | - Prabodh Kantiwal
- Orthopaedics, All India Institute of Medical Sciences, Jodhpur, IND
| | - Meenakshi Rao
- Pathology, All India Institute of Medical Sciences, Jodhpur, IND
| | - Abhay Elhence
- Orthopaedics, All India Institute of Medical Sciences, Jodhpur, IND
| |
Collapse
|
2
|
Wu Z, Cheng L, Cao Q, Ye S, Yu S, Sun M, Jing J. Case report and literature review: Primary leiomyosarcoma of the bone in the trochanteric region of the femur. Front Surg 2023; 9:1045307. [PMID: 36704525 PMCID: PMC9872517 DOI: 10.3389/fsurg.2022.1045307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/16/2022] [Indexed: 01/11/2023] Open
Abstract
Background Primary leiomyosarcoma of the bone (LMSB) is an extremely rare, invasive, and highly destructive primary osteosarcoma with limited treatment options and poor prognosis. Only a few case reports of LMSB have been described because of its rarity. Therefore, clinicians have a limited understanding of its diagnosis, treatment, and prognosis, and the final diagnosis depends on histopathological findings. In this report, we describe a rare case of primary LMSB in the trochanteric region of the femur. Reporting this case may increase the dissemination and understanding of information regarding LMSB and provide a reference for the diagnosis and treatment of similar cases. Case presentation A 63-year-old woman presented with pain and limited movement of the left hip, which had lasted for 3 months, with no history of trauma or illness. Plain radiography and computed tomography revealed a solitary osteolytic lesion in the trochanteric area of the left femur with focal cortical destruction. Magnetic resonance imaging findings suggested invasion of the lesion into the bone cortex, forming a soft tissue mass, although no distant positive findings were observed on a whole-body bone scan. A bone tumor puncture biopsy was performed to obtain a final diagnosis, and histopathological evaluation revealed left femoral intertrochanteric leiomyosarcoma, classified as G1T2M0 and staged as IB (extracompartmental low-grade malignant) according to the Enneking staging system. Thus, we performed extensive debridement and left hip arthroplasty. Postoperative chemotherapy was administered, and the patient was followed up for 4 years. Four years later, the patient's left hip pain had resolved, joint activity was good, and no signs of recurrence or distant metastasis of the bone tumor were noted. Conclusion For proximal femoral Enneking stage IB LMSB, extensive tumor resection combined with tumor prosthesis replacement may be an effective treatment method to prolong the patient's lifespan and to restore joint function.
Collapse
Affiliation(s)
- Zhonghan Wu
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China,Institute of Orthopaedics, Research Center for Translational Medicine, The Second Hospital of Anhui Medical University, Hefei, China
| | - Li Cheng
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China,Institute of Orthopaedics, Research Center for Translational Medicine, The Second Hospital of Anhui Medical University, Hefei, China
| | - Qiliang Cao
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China,Institute of Orthopaedics, Research Center for Translational Medicine, The Second Hospital of Anhui Medical University, Hefei, China
| | - Shuming Ye
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China,Institute of Orthopaedics, Research Center for Translational Medicine, The Second Hospital of Anhui Medical University, Hefei, China
| | - Shuisheng Yu
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China,Institute of Orthopaedics, Research Center for Translational Medicine, The Second Hospital of Anhui Medical University, Hefei, China
| | - Min Sun
- Institute of Orthopaedics, Research Center for Translational Medicine, The Second Hospital of Anhui Medical University, Hefei, China
| | - Juehua Jing
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China,Institute of Orthopaedics, Research Center for Translational Medicine, The Second Hospital of Anhui Medical University, Hefei, China,Correspondence: Juehua Jing
| |
Collapse
|
3
|
Zhang J, Chen Y, Xing X, Wang Q, Liu K, Zhang E, Lang N. Primary leiomyosarcoma of the spine: an analysis of imaging manifestations and clinicopathological findings. Insights Imaging 2022; 13:195. [PMID: 36520263 PMCID: PMC9755377 DOI: 10.1186/s13244-022-01336-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 11/22/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Primary leiomyosarcoma of the spine is extremely rare and lacks specific clinical symptoms. This study investigated the imaging manifestations and clinicopathological findings of primary leiomyosarcoma of the spine, aiming to improve the radiologists' understanding of the disease and reduce misdiagnoses. METHODS The clinical, imaging, and pathological manifestations in eleven patients with pathologically confirmed primary leiomyosarcoma of the spine were retrospectively analyzed. The imaging features analyzed included lesion location, shape, border, size, and density/intensity, and adjacent bone destruction status, residual bone trabeculae, vertebral compression, and contrast enhancement. RESULTS The patients' primary clinical symptom was usually focal pain. Primary leiomyosarcoma of the spine was mostly a solitary lesion and tended to occur in the posterior elements. The tumors had a lobulated shape with osteolytic bone destruction, ill-defined borders, and could involve multiple segments. Computed tomography (CT) examination showed isodense masses. Six patients showed residual bone trabeculae. Two patients had miscellany T2-weighted imaging (T2WI) signals, while the tumor and spinal cord of the remaining patients were isointense on T1-weighted imaging (T1WI) and T2WI. Among the seven patients who underwent contrast-enhanced scanning, six displayed homogeneous enhancement. Eight patients underwent gross-total tumor resection with no recurrence. CONCLUSIONS Primary leiomyosarcoma of the spine tends to be a solitary lesion in the posterior elements and appears as a lobulated mass with osteolytic bone destruction and an ill-defined border. The tumor and spinal cord can be isointense on T1WI and T2WI. Contrast-enhanced scanning displays homogeneous enhancement. The lesion tends not to recur after surgical gross-total tumor resection.
Collapse
Affiliation(s)
- Jiahui Zhang
- grid.411642.40000 0004 0605 3760Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Yongye Chen
- grid.411642.40000 0004 0605 3760Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Xiaoying Xing
- grid.411642.40000 0004 0605 3760Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Qizheng Wang
- grid.411642.40000 0004 0605 3760Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Ke Liu
- grid.411642.40000 0004 0605 3760Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Enlong Zhang
- grid.449412.eDepartment of Radiology, Peking University International Hospital, Beijing, People’s Republic of China
| | - Ning Lang
- grid.411642.40000 0004 0605 3760Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191 People’s Republic of China
| |
Collapse
|
4
|
Zumárraga JP, Arouca MM, Baptista AM, Caiero MT, Rubio DE, Camargo OPD. PRIMARY LEIOMYOSARCOMA OF BONE: CLINICOPATHOLOGIC AND PROGNOSTIC FACTORS ANALYSIS IN A SINGLE INSTITUTION. ACTA ORTOPEDICA BRASILEIRA 2019; 27:152-155. [PMID: 31452611 PMCID: PMC6699396 DOI: 10.1590/1413-785220192703215676] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Objective Primary leiomyosarcoma of bone (PLB) is a rare type of malignant bone tumor considered as a variant of the spindle cell sarcomas (SCS). The objective of this study was to analyze the clinicopathologic and the prognostic factors of patients with PLB treated at a single institution. Methods We retrospectively reviewed the records of 22 patients with pathologically confirmed PLB. The data collected were: age, sex, tumor size and location, grade and stage of the disease and histopathologic features. Mean age was 45.5 years (range, 17 to 73 y). Location was: upper limb (27.3%), lower limb (68.2%) and pelvis (4.5%). Patients had high grade in 90.9% of the reports. Margins were negative in 77.3% of the cases. Histological reports describe spindly sarcomatous cells arranged in fascicles with increased vascular formation without osteoid or chondroid matrix production. On immunohistochemistry, smooth muscle actin and desmin where positive in all cases. Results Mean follow-up time was 73.5 months (range, 5.3 to 331.1 m). We found 22.7% of local recurrence (LR). Distant metastasis (DM) was reported in 9 (40.9%) patients. Lung metastasis was the only DM affected site. Overall survival (OS) rate in 5 years was 59.1%. Predictors of OS were LR and DM. Conclusions PLB is an extremely rare malignant bone tumor that has a higher rate of DM and similar OS prognosis compared with other bone sarcomas. Level of Evidence IV, Case Series.
Collapse
|
5
|
Oyama R, Takahashi M, Kito F, Sakumoto M, Shiozawa K, Qiao Z, Yoshida A, Endo M, Kawai A, Kondo T. Establishment and characterization of patient-derived xenograft and its cell line of primary leiomyosarcoma of bone. In Vitro Cell Dev Biol Anim 2018; 54:458-467. [PMID: 29845452 DOI: 10.1007/s11626-018-0258-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 04/12/2018] [Indexed: 01/09/2023]
Abstract
Primary leiomyosarcoma (LMS) of bone is a rare and aggressive mesenchymal malignancy that differentiates toward smooth muscle. Complete resection is the only curable treatment, and novel therapeutic approaches for primary LMS of bone have long been desired. Patient-derived xenografts (PDXs) and cell lines are invaluable tools for preclinical studies. Here, we established PDXs from a patient with primary LMS of bone and a cell line from an established PDX. Bone primary LMS tissue was subcutaneously implanted into highly immune-deficient mice. After two passages, a piece of the tumor was subjected to tissue culturing, and a morphological evaluation and proteomic analysis were performed on the PDX and the established cell line. Moreover, the responses of the established cell line to anti-cancer drugs were examined. Microscopic observations revealed that the PDX tumors retained their original histology. The cell line was established from the third-generation PDX and named NCC-LMS1-X3-C1. The cells were maintained for over 18 mo and 40 passages. The cells exhibited a spindle shape and aggressive growth. Mass spectrometric protein identification revealed that the original tumor tissue, PDX tumor tissue, and NCC-LMS1-X3-C1 cells had similar but distinct protein expression profiles. We previously established the cell line, NCC-LMS1-C1, from the tumor tissue of same patient. We found that the response to drug treatments was different between NCC-LMS1-X3-C1 and NCC-LMS1-C1, suggesting the heterogeneous traits of tumor cells in the identical tumor tissue. This set of PDXs and stable cell line will be a useful resource for bone LMS research.
Collapse
Affiliation(s)
- Rieko Oyama
- Department of Innovative Seeds Evaluation, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Mami Takahashi
- Central Animal Division, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Fusako Kito
- Department of Innovative Seeds Evaluation, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Marimu Sakumoto
- Department of Innovative Seeds Evaluation, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Kumiko Shiozawa
- Division of Rare Cancer Research, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Zhiwei Qiao
- Division of Rare Cancer Research, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Akihiko Yoshida
- Department of Pathology and Clinical Laboratories, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Makoto Endo
- Division of Musculoskeletal Oncology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Akira Kawai
- Division of Musculoskeletal Oncology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Tadashi Kondo
- Department of Innovative Seeds Evaluation, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan. .,Division of Rare Cancer Research, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.
| |
Collapse
|
6
|
Recine F, Bongiovanni A, Casadei R, Pieri F, Riva N, De Vita A, Mercatali L, Liverani C, Spadazzi C, Miserocchi G, Fausti V, Amadori D, Ibrahim T. Primary leiomyosarcoma of the bone: a case report and a review of the literature. Medicine (Baltimore) 2017; 96:e8545. [PMID: 29137065 PMCID: PMC5690758 DOI: 10.1097/md.0000000000008545] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE Leiomyosarcoma (LMS) is a malignant sarcoma that can occur in different anatomic sites, including the bone, showing similar histological characteristics but heterogeneous clinical behavior and prognosis. Primary bone LMS was first described in 1965. It is a very rare sarcoma, accounting for <0.7% of all primary malignant bone tumors. PATIENT CONCERNS We report the case of a 52-year-old male with primary bone LMS who presented with a solitary osteolytic lesion with focal cortical destruction in the left clavicle, seen on an x-ray and subsequent computed tomography (CT) scan. DIAGNOSIS The multidisciplinary Osteoncology team of our institute planned a biopsy that revealed the presence of spindle and pleomorphic cells with a positive reaction for smooth muscle actin and desmin at immunohistochemical analysis, without the presence of cartilage or bone matrix. These results were consistent with a high-grade malignant LMS arising from the bone. INTERVENTIONS Complete surgical resection of the tumor was performed and a decision was made with the patient not to proceed with adjuvant chemotherapy or radiotherapy. OUTCOMES After more than 1 year of surgery, the patient is well, with no evidence of recurrent or metastatic disease. Follow-up is ongoing. LESSONS Little is known about the biology and clinical behavior of bone LMS due to its extreme rarity. A multidisciplinary team in a specialized center is needed for the optimal management of the disease. Surgery with a curative intent is the cornerstone of treatment of localized disease. No data are available about chemotherapy in neoadjuvant, adjuvant, or advanced settings. Further research is needed to identify more effective therapies.
Collapse
Affiliation(s)
- Federica Recine
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Alberto Bongiovanni
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Roberto Casadei
- Department of Orthopedics, Istituto Ortopedico Rizzoli, University of Bologna, Bologna
| | - Federica Pieri
- Pathology Unit, Morgagni-Pierantoni Hospital, Forlì, Italy
| | - Nada Riva
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Alessandro De Vita
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Laura Mercatali
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Chiara Liverani
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Chiara Spadazzi
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Giacomo Miserocchi
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Valentina Fausti
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Dino Amadori
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| | - Toni Ibrahim
- Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola
| |
Collapse
|
7
|
Pacheco-Nuñez JA, Sheppard JE, Mahoney AP. Distal ulna leiomyosarcoma treated with custom polymethylmethacrylate prosthesis with a 4-year follow-up. Hand (N Y) 2015; 10:541-6. [PMID: 26330792 PMCID: PMC4551620 DOI: 10.1007/s11552-014-9725-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND Intraosseous leiomyosarcoma is a rare neoplasm having an aggressive biologic behavior. The distal end of the ulna is a very uncommon site for this type of primary bone tumor frequently mistaken for benign lesions. En bloc resection of the distal ulna with reconstruction is a valid option as a limb salvage procedure for the treatment of this difficult problem, minimizing local recurrence while preserving hand function. CASE DESCRIPTION We present an unusual case of a 63-year-old woman with a primary leiomyosarcoma arising from the distal end of the ulna treated successfully with a wide excision and custom distal ulna, with 4-year follow-up and no recurrence. LITERATURE REVIEW Tumors to develop at the distal end of the ulna have been reported as part of large series such as Dahlin and few case reports. According to Cooney, Exner, and Mankin, reconstruction for distal ulnar neoplasms is not necessary to maintain function. However, Noble and Laurentin-Perez disagree because stabilization of the distal ulna following large resection, as in our case, can be a significant problem with associated pain and weakness due to a decreased interosseous space with ulnar stump impingement on the radial metaphysis and ulnar translation of the carpus. CLINICAL RELEVANCE Custom methacrylate in situ radioulnar joint prosthesis for reconstruction of a large segment of the distal ulna can be a valid option to reestablish the mechanical continuity of the forearm, reducing pain and improving strength and function.
Collapse
Affiliation(s)
| | - Joseph E. Sheppard
- Department of Orthopaedic Surgery, University of Arizona Medical Center, P.O. Box 245064, Tucson, AZ 85724-5064 USA
| | | |
Collapse
|
8
|
Primary leiomyosarcoma of bone: analysis of prognosis. Sarcoma 2012; 2012:636849. [PMID: 22550421 PMCID: PMC3329678 DOI: 10.1155/2012/636849] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 12/31/2011] [Accepted: 01/02/2012] [Indexed: 11/24/2022] Open
Abstract
Leiomyosarcoma of bone is just one of the variants of spindle cell sarcoma of bone characterised by the expression of desmin and other markers indicating a significant element of smooth muscle in the tumour, without osteoid production we have investigated the management and outcome of this rare type of primary malignant bone tumour. Method. Retrospective review of data stored on a prospective database. Results. In a database of 3364 patients with primary malignant bone sarcomas, 31 patients were identified with a primary leiomyosarcoma of bone. There were 12 males and 19 females with a mean age of 46 and tumour size of 8 cm. The most common site was the distal femur followed by the proximal tibia. Treatment was with chemotherapy and surgical resection. Seven of the patients had metastases at diagnosis. Surgery was carried out in 28 patients, 8 having amputation and 20 limb salvage. Three patients developed local recurrence, but half developed metastases. All patient disease-specific survival was 57% at five years and 44% at 10 yrs but for those without metastases was 82% and 60%, respectively. The only prognostic factors were metastases at diagnosis. Conclusion. Leiomyosarcoma of bone is a very rare primary malignant bone tumour affecting a predominantly older population. Despite the high incidence of metastases, survival is better than for other bone sarcomas for those without metastases at diagnosis.
Collapse
|
9
|
Rekhi B, Kaur A, Puri A, Desai S, Jambhekar NA. Primary leiomyosarcoma of bone--a clinicopathologic study of 8 uncommon cases with immunohistochemical analysis and clinical outcomes. Ann Diagn Pathol 2011; 15:147-56. [PMID: 21393038 DOI: 10.1016/j.anndiagpath.2010.11.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 10/24/2010] [Accepted: 11/11/2010] [Indexed: 01/15/2023]
Abstract
Primary leiomyosarcoma of bone is a rare and a diagnostically challenging tumor entity. Over a 7-year period, we identified 8 such cases that fulfilled the diagnostic criteria in 6 men and 2 women, with age ranging from 25 to 59 years (mean, 42.7 years). All cases were noted in the lower limbs, including femur and tibia as the commonly involved bones in 4 and 3 cases, respectively. On radiography, the most consistent feature was a solitary osteolytic lesion with cortical destruction, unassociated with matrix formation. On histopathology, all cases showed spindly sarcomatous cells, mostly arranged in fascicles and whorls. Of 8 cases, 6 (75%) were of high grade. Prominent vasculature was noted in 5 cases. Two cases displayed focal mineralization, including calcification and heterotropic woven bone formation in 1 case each, but lacked malignant osteoid or chondroid matrix. One case showed osteoclast-like giant cells. On immunohistochemistry, smooth muscle actin was diffusely positive in all cases (100%), desmin was positive in 6 (75%) of 8 cases, and h-caldesmon was positive in 5 (83.3%) of 6 cases. Five cases underwent surgery, including 3 amputations and 2 wide excisions. One case underwent chemotherapy. On follow-up, 5 cases developed metastasis, including 1 case with another, who died within 17 and 5 months. Leiomyosarcoma of bone is uncommon and diagnostically challenging. An index of suspicion is necessary for this diagnosis, especially in cases of lytic, destructive bone lesions, unassociated with matrix production, that show spindly sarcomatous cells on histopathology. Immunohistochemical analysis, including an optimum panel formed by smooth muscle actin (diffuse positivity), desmin, and h-caldesmon, is necessary for substantiating this diagnosis. Surgery forms the treatment mainstay. The prognosis appears to be dismal.
Collapse
Affiliation(s)
- Bharat Rekhi
- Department of Pathology, Tata Memorial Hospital, Parel, Mumbai 400012, India.
| | | | | | | | | |
Collapse
|