Current concepts for the diagnosis and management of eosinophilic granuloma of bone
Journal of Orthopaedics and Traumatology volume 18, pages 83–90 (2017)
This review summarizes current concepts in the diagnosis and management of the patients with eosinophilic granuloma. Given the benign biology, the clinical course, and the pediatric group of patients that this condition more commonly affects, a treatment approach that carries a lower risk of complications while ensuring a successful cure is desirable. Variable treatment options have been reported with satisfactory results and a recurrence rate of less than 20 %. In this setting, symptomatic lesions that are accessible in the spine or the extremities may be treated with intralesional methylprednisolone injection after tissue biopsy for histological diagnosis.
Langerhans-cell histiocytosis is a rare disease involving clonal proliferation of Langerhans cells [1, 2]. It is part of a group of clinical syndromes called histiocytoses, which are characterized by an abnormal proliferation of histiocytes (an archaic term for activated dendritic cells and macrophages). These diseases are related to other forms of abnormal proliferation of white blood cells, such as leukemias and lymphomas. The disease, previously known as histiocytosis X, was renamed in 1985 by the Histiocyte Society as Langerhans-cell histiocytosis because of the proliferation of Langerhans-cells. The spectrum includes localized-to-bone eosinophilic granuloma, and the rare multisystem syndromes Hand–Schüller–Christian disease and Abt–Letterer–Siwe disease; the manifestations range from isolated bone lesions to multisystem disease [1, 2].
Eosinophilic granuloma of bone
Eosinophilic granuloma is a rare, benign tumor-like disorder characterized by clonal proliferation of antigen-presenting mononuclear cells of dendritic origin known as Langerhans cells [1, 2]. It is the most common manifestation of Langerhans-cell histiocytosis (60–80 % cases), accounting for less than 1 % of all bone tumors . In 80 % of cases it affects children and adolescents [4, 5]. It can affect any bone in the skeleton; however, bone lesions are more common in the skull, mandible, spine, ribs, and long bones; the femur, humerus and clavicle are the most frequent sites . The pathogenesis is unclear; viruses such as Epstein-Barr and human herpes virus-6, bacteria, and genetic factors have been implicated [3, 7, 8]. An immunological dysfunction including an increase of certain cytokines such as interleukin-1 and interleukin-10 in affected patients has also been reported; familial occurrence is very rare [1, 9]. In the spine, eosinophilic granuloma accounts for 6.5–25 % of all spinal bone tumors [5, 10–16]. The most common location is the thoracic spine followed by the lumbar and the cervical spine [10, 15, 17–20]. Clinical symptoms are often severe and depend on spinal location [14, 15, 20]. The most common include back or neck pain, tenderness to spinal palpation and restricted range of motion, or torticollis; spinal instability and neurological symptoms are uncommon [5, 15, 21–25]. In the extremities, most lesions are diaphyseal . The physical examination of the child may be essentially normal. Laboratory findings are usually non-specific except for a moderate and inconsistent rise in erythrocyte sedimentation rate.
The typical radiographic appearance of eosinophilic granuloma of the extremities is a punched-out lytic-bone lesion without reactive sclerosis. In most cases, a hypervascularized soft-tissue mass surrounds the affected bone [26, 27]. The radiographic differential diagnosis should include plasmacytoma, multiple myeloma, osteochondritis, tuberculosis or osteomyelitis. In the spine, imaging studies may reveal variable vertebral involvement, ranging from isolated lytic lesions to a more significant vertebral collapse that involves the pedicles and posterior vertebral elements (vertebra plana), peridural spread and paraspinal soft tissue components [20, 25]. Although eosinophilic granuloma is the most common cause of vertebra plana, this finding can also be found in Ewing’s sarcoma, lymphoma and other sarcomas, infections such as tuberculosis, and osteogenesis imperfect [28, 29]. In favor of the eosinophilic granuloma are the isolated spinal disease, the lack of constitutional symptoms, and minimal laboratory abnormalities . Cervical spine eosinophilic granuloma more often manifests with osteolytic lesions, rather than vertebra plana [18, 20, 25, 30].
Tissue biopsy for histological diagnosis is necessary when clinical and radiological manifestations are ambiguous, and the lesions are symptomatic . CT-guided biopsy for eosinophilic granuloma has been effective for histological diagnosis, with low morbidity and a diagnostic accuracy of 70–100 % [5, 31–38]. Although anecdotally excellent results with biopsy alone have been previously reported for patients with eosinophilic granulomas , biopsy should not be considered as a strategy for treatment of these patients but rather as a step to confirm diagnosis [26, 32, 33, 36–38, 40–42].
Various treatment options have been reported for eosinophilic granuloma of bone, including observation and immobilization, indomethacin administration, methylprednisolone injections, radiofrequency ablation, local excision and curettage with or without bone grafting, chemotherapy and irradiation; results have been reported as satisfactory with a recurrence rate of less than 20 % [11, 13, 14, 32–34, 43–48]. In general, the treatment of typical solitary lesions in asymptomatic patients is conservative [16, 20, 25]. In patients with mild neurological deficits from solitary eosinophilic granulomas of the spine, immobilization and radiation therapy has been reported . Low-dose radiation therapy is advocated by some authors to be effective in the healing of lytic lesions and limiting disease progression ; others argue that radiation therapy may damage endochondral growth plates and limit bone healing and reconstitution [49, 50], or lead to secondary radiation-induced morbidity such as post-radiation sarcomas and myelitis [5, 51]. Although no clear correlation between the degree of vertebral collapse and the degree of neurological symptoms has been observed , in patients with severe pain and restriction of range of motion, and/or persistent spinal subluxation and neurological symptoms, surgical treatment is required [12, 13, 15, 19, 20]. Chemotherapy is not recommended for solitary eosinophilic granuloma, and should be reserved for systemic involvement [13, 20, 48], or as initial therapy in children with solitary lesions in locations that preclude safe and complete surgical resection .
Since eosinophilic granuloma in children is known to resolve spontaneously with time, observation alone or biopsy alone to confirm the diagnosis have also been recommended as a treatment strategy . A previous study reported spontaneous resolution without recurrence of the lesions in six skeletally immature patients that had biopsy followed by observation alone (open biopsy in three and percutaneous in three), suggesting the intriguing possibility that surgery may result in a higher rate of recurrence than less aggressive procedures . We concur that biopsy may have an effect on bone healing and eosinophilic granuloma lesions reconstitution . However, we disagree that patients, especially children with symptomatic bone lesions should be left alone to let the disease take its natural course without a histological diagnosis. Moreover, although solitary eosinophilic granuloma is considered a benign lesion, without treatment, the time required for resolution is unpredictable and can be associated with significant morbidity secondary to unremitting pain, restricted activity, growth disturbance, or pathological fracture [26, 47]. Therefore, we recommend that these patients should undergo biopsy for histological diagnosis, and treatment is then considered [36–38].
Given the benign biology and clinical course of eosinophilic granuloma and the pediatric group of patients that this condition more commonly affects, a treatment approach that carries a lower risk of complications while ensuring a successful cure is desirable. In this setting, symptomatic lesions that are accessible in the spine (Figs. 1, 2, 3) or the extremities (Fig. 4) may be treated with intralesional methylprednisolone injection after tissue biopsy for histological diagnosis [8, 26, 31–33, 36–38].
Langerhans histiocytosis, as a systemic disease, appears to be one of the most tissue-destructive syndromes, able to induce multiple and grossly apparent lytic lesions involving many organs and the bones. Since this lytic activity cannot be connected with a neoplastic nature of the disease, one can reasonably assume that histiocytosis X cells induce bone resorption in eosinophilic granuloma through their ability to secrete locally tissue-lytic factors such as interleukins and prostaglandins . Several in vitro studies have demonstrated the production of interleukins (IL) such as IL-1 and prostaglandins (PG) such as PGE2 and PGD2 by suspensions of Langerhans cells [53, 54]. Although definitive proof that corticosteroid injection is responsible for the observed response is difficult to obtain, the inhibition of IL-1-induced bone resorption and prostaglandin production by methylprednisolone  may account for its clinical and radiographic effect. Previous studies on the treatment of certain osteolytic lesions including bone cysts, aneurysmal cysts, eosinophilic granulomas and nonossifying fibromas showed that the results obtained through the introduction of methylprednisolone acetate in crystals were better than those obtained by using other corticosteroids with topical action . This is because it is a microcrystalline suspension of acetate of methylprednisolone that is relatively insoluble and, therefore, has a prolonged pharmalogical effect . A particular dosage for eosinophilic granulomas cannot be recommended. The amount of methylprednisolone acetate injected was established empirically on the basis of the size of the lesion. A minimum of 40 mg for small lesions involving less than half the diameter of the involved bone, and up to 160 mg for large lesions of the pelvis has been recommended [36–38].
Scaglietti et al.  first reported the use of intralesional methylprednisolone injection for eosinophilic granuloma, with excellent results, and recommended the injection of methyl-prednisolone as the treatment of choice. Subsequently, similar clinical and radiographic results have been described in case reports and small series of patients with solitary and polyostotic lesions involving craniofacial and long bones [27, 33, 56–58]. The benefit of intralesional methylprednisolone injection compared with other methods is that it promotes early relief of pain and predictable osseous healing [31, 34]. The results of treatment, either as an adjunct or as primary treatment have been comparable to other treatments [26, 31–33, 40]. Others reported that intralesional methylprednisolone injection adds little in children [33, 39]. However, in patients with symptomatic lesions, treatment is required. In view of the usually benign clinical course of the disease, in these patients a simple, minimally invasive, outpatient treatment with a low rate of complications such as CT-guided intralesional methylprednisolone injection may be considered the treatment of choice [36–38].
Complications such as femoral osteomyelitis  and obstructive hydrocephalus have been reported after methylprednisolone injections for eosinophilic granulomas . However, in general, the morbidity associated with the procedure has been negligible, even when relatively inaccessible regions of the spine or pelvis are involved . The ability of the involved bone to reconstitute after methylprednisolone injection is believed to be due to the fact that the disease affects children before skeletal maturity so that the pubertal growth spurt provides sufficient time for adequate remodeling by the active growth plates that are spared by the disease process [5, 34]. Some lesions may fail to respond or are unsuitable for treatment by injection because of their site, impending fracture, or soft-tissue invasion . Furthermore, it seems that incomplete vertebral remodeling usually does not lead to chronic pain or compromise structural integrity [5, 24, 59, 60].
Authors’ commentary and conclusion
This review summarizes current concepts in the diagnosis and management of patients with eosinophilic granuloma, with emphasis on the role of intralesional methylprednisolone injection for the successful cure of patients with symptomatic lesions. In the past, we planned for observation alone for patients with imaging evidence of eosinophilic granuloma, and curettage for the most painful lesions. It was our initial belief that percutaneous techniques do not provide adequate tissue for definitive diagnosis for mesenchymal tumors [61–63]. This belief was based on the agreement among pathologists that mesenchymal tumors are among the most difficult of pathologies to accurately diagnose. We then realized that patients, especially children with symptomatic bone lesions, should not be left alone for the disease to take its natural course without a histological diagnosis. Over the past 15 years, we have been able to refine the procedures for needle or trocar and frozen sections biopsy to assess the adequacy of the biopsy specimen. Nowadays, we believe that histological diagnosis is necessary for all bone lesions, and recommend that biopsy should not be considered as a strategy for treatment of eosinophilic granuloma but rather as a step to confirm diagnosis. By using CT-guided intralesional methylprednisolone injection, frozen sections histological diagnosis can be obtained in all patients. After biopsy, intralesional injection of methylprednisolone is considered beneficial [31–33], or at least not harmful. In our practice, tissue procurement and frozen sections biopsy are usually diagnostic in all patients with suspected eosinophilic granuloma. Even if the definite histological diagnosis is different, intralesional methylprednisolone injection would not have resulted in any adverse effect, but rather it would have decreased intralesional edema and provided pain relief. Our long-term results, (mean follow up, 9 years; range, 4–23 years) support biopsy and intralesional methylprednisolone injection as a safe treatment for eosinophilic granulomas of bone with complete resolution of pain and imaging reconstitution of the lesions.
Favara BE, Feller AC, Pauli M, Jaffe ES, Weiss LM, Arico M, Bucsky P, Egeler RM, Elinder G, Gadner H, Gresik M, Henter JI, Imashuku S, Janka-Schaub G, Jaffe R, Ladisch S, Nezelof C, Pritchard J (1997) Contemporary classification of histiocytic disorders. The WHO Committee On Histiocytic/Reticulum Cell Proliferations. Reclassification Working Group of the Histiocyte Society. Med Pediatr Oncol 29(3):157–166
Willman CL, Busque L, Griffith BB, Favara BE, McClain KL, Duncan MH, Gilliland DG (1994) Langerhans’-cell histiocytosis (histiocytosis X)—a clonal proliferative disease. N Engl J Med 331(3):154–160
Chadha M, Agarwal A, Agarwal N, Singh MK (2007) Solitary eosinophilic granuloma of the radius. An unusual differential diagnosis. Acta Orthop Belg 73(3):413–417
Puzzilli F, Mastronardi L, Farah JO, Ruggeri A, Lunardi P (1998) Solitary eosinophilic granuloma of the calvaria. Tumori 84(6):712–716
Greenlee JD, Fenoy AJ, Donovan KA, Menezes AH (2007) Eosinophilic granuloma in the pediatric spine. Pediatr Neurosurg 43(4):285–292
Kilpatrick SE, Wenger DE, Gilchrist GS, Shives TC, Wollan PC, Unni KK (1995) Langerhans’ cell histiocytosis (histiocytosis X) of bone. A clinicopathologic analysis of 263 pediatric and adult cases. Cancer 76(12):2471–2484
Islinger RB, Kuklo TR, Owens BD, Horan PJ, Choma TJ, Murphey MD, Temple HT (2000) Langerhans’ cell histiocytosis in patients older than 21 years. Clin Orthop Relat Res 379:231–235
Azouz EM, Saigal G, Rodriguez MM, Podda A (2005) Langerhans’ cell histiocytosis: pathology, imaging and treatment of skeletal involvement. Pediatr Radiol 35(2):103–115
Shimakage M, Sasagawa T, Kimura M, Shimakage T, Seto S, Kodama K, Sakamoto H (2004) Expression of Epstein-Barr virus in Langerhans’ cell histiocytosis. Hum Pathol 35:862–868
Davidson RI, Shillito J Jr (1970) Eosinophilic granuloma of the cervical spine in children. Pediatrics 45(5):746–752
Sweasey TA, Dauser RC (1989) Eosinophilic granuloma of the cervicothoracic junction. Case report. J Neurosurg 71:942–944
Bilge T, Barut S, Yaymaci Y, Alatli C (1995) Solitary eosinophilic granuloma of the lumbar spine in an adult. Case report. Paraplegia 33:485–487
Scarpinati M, Artico M, Artizzu S (1995) Spinal cord compression by eosinophilic granuloma of the cervical spine. Case report and review of the literature. Neurosurg Rev 18:209–212
Brown CW, Jarvis JG, Letts M, Carpenter B (2005) Treatment and outcome of vertebral Langerhans cell histiocytosis at the Children’s Hospital of Eastern Ontario. Can J Surg 48(3):230–236
Tanaka N, Fujimoto Y, Okuda T, Nakanishi K, Sumida T, Manabe H, Ochi M (2005) Langerhans cell histiocytosis of the atlas. A report of three cases. J Bone Joint Surg Am 87(10):2313–2317
Metellus P, Gana R, Fuentes S, Eusebio A, Adetchessi A, Dufour H, Grisoli F (2007) Spinal Langerhans’ cell histiocytosis in a young adult: case report and therapeutic considerations. Br J Neurosurg 21(2):228–230
Robert H, Dubousset J, Miladi L (1987) Histiocytosis X in the juvenile spine. Spine 12:167–172
Sanchez RL, Llovet J, Moreno A, Galito E (1984) Symptomatic eosinophilic granuloma of the spine: report of two cases and review of the literature. Orthopedics 7:1721–1726
Dickinson LD, Farhat SM (1991) Eosinophilic granuloma of the cervical spine. A case report and review of the literature. Surg Neurol 35:57–63
Bertram C, Madert J, Eggers C (2002) Eosinophilic granuloma of the cervical spine. Spine 27:1408–1413
Kumar A (1990) Eosinophilic granuloma of the spine with neurological deficit. Orthopedics 13:1310–1312
Villas C, Martínez-Peric R, Barrios RH, Beguiristain JL (1993) Eosinophilic granuloma of the spine with and without vertebra plana: longterm follow-up of six cases. J Spinal Disord 6(3):260–268
Maggi G, de Sanctis N, Aliberti F, Nunziata Rega A (1966) Eosinophilic granuloma of C 4 causing spinal cord compression. Childs Nerv Syst 12(10):630–632
Raab P, Hohmann F, Kuhl J, Krauspe R (1998) Vertebral remodeling in eosinophilic granuloma of the spine: a long-term follow-up. Spine 23:1351–1354
Yeom JS, Lee CK, Shin HY, Lee CS, Han CS, Chang H (1999) Langerhans’ cell histiocytosis of the spine. Analysis of twenty-three cases. Spine 24:1740–1749
Cohen M, Zornoza J, Cangir A, Murray JA, Wallace S (1980) Direct injection of methylprednisolone sodium succinate in the treatment of solitary eosinophilic granuloma of bone: a report of 9 cases. Radiology 136(2):289–293
Ruff S, Chapman GK, Taylor TK, Ryan MD (1983) The evolution of eosinophilic granuloma of bone: a case report. Skelet Radiol 10(1):37–39
O’Donnell J, Brown L, Herkowitz H (1991) Vertebra plana-like lesions in children: case report with special emphasis on the differential diagnosis and indications for biopsy. J Spinal Disord 4:480–485
Ferguson L, Shapiro CM (1979) Eosinophilic granuloma of the second cervical vertebra. Surg Neurol 11:435–437
Floman Y, Bar-On E, Mosheiff R, Mirovsky Y, Robin GC, Ramu N (1997) Eosinophilic granuloma of the spine. J Pediatr Orthop B 6(4):260–265
Yasko AW, Fanning CV, Ayala AG, Carrasco CH, Murray JA (1998) Percutaneous techniques for the diagnosis and treatment of localized Langerhans-cell histiocytosis (eosinophilic granuloma of bone). J Bone Joint Surg Am 80(2):219–228
Capanna R, Springfield DS, Ruggieri P, Biagini R, Picci P, Bacci G, Giunti A, Lorenzi EG, Campanacci M (1985) Direct cortisone injection in eosinophilic granuloma of bone: a preliminary report on 11 patients. J Pediatr Orthop 5(3):339–342
Egeler RM, Thompson RC Jr, Voûte PA, Nesbit ME Jr (1992) Intralesional infiltration of corticosteroids in localized Langerhans’ cell histiocytosis. J Pediatr Orthop 12(6):811–814
Sessa S, Sommelet D, Lascombes P, Prévot J (1994) Treatment of Langerhans-cell histiocytosis in children. Experience at the Children’s Hospital of Nancy. J Bone Joint Surg Am 76(10):1513–1525
Elsheikh T, Silverman JF, Wakely PE Jr, Holbrook CT, Joshi VV (1991) Fine-needle aspiration cytology of Langerhans’ cell histiocytosis (eosinophilic granuloma) of bone in children. Diagn Cytopathol 7(3):261–266
Rimondi E, Mavrogenis AF, Rossi G, Ussia G, Angelini A, Ruggieri P (2011) CT-guided corticosteroid injection for solitary eosinophilic granuloma of the spine. Skelet Radiol 40(6):757–764
Mavrogenis AF, Rimondi E, Ussia G, Rossi G, Ruggieri P (2011) Successful treatment of a bifocal eosinophilic granuloma of the spine with CT-guided corticosteroid injection. Orthopedics 34(3):230
Mavrogenis AF, Abati CN, Bosco G, Ruggieri P (2012) Intralesional methylprednisolone for painful solitary eosinophilic granuloma of the appendicular skeleton in children. J Pediatr Orthop 32(4):416–422
Plasschaert F, Craig C, Bell R, Cole WG, Wunder JS, Alman BA (2002) Eosinophilic granuloma. A different behaviour in children than in adults. J Bone Joint Surg Br 84(6):870–872
Scaglietti O, Marchetti PG, Bartolozzi P (1982) Final results obtained in the treatment of bone cysts with methylprednisolone acetate (depo-medrol) and a discussion of results achieved in other bone lesions. Clin Orthop Relat Res 165:33–42
Nauert C, Zornoza J, Ayala A, Harle TS (1983) Eosinophilic granuloma of bone: diagnosis and management. Skelet Radiol 10(4):227–235
Shabb N, Fanning CV, Carrasco CH, Guo SQ, Katz RL, Ayala AG, Raymond AK, Cangir A (1993) Diagnosis of eosinophilic granuloma of bone by fine-needle aspiration with concurrent institution of therapy: a cytologic, histologic, clinical, and radiologic study of 27 cases. Diagn Cytopathol 9(1):3–12
Ladisch S, Gadner H (1994) Treatment of Langerhans cell histiocytosis—evolution and current approaches. Br J Cancer 23:S41–S46
McLelland J, Broadbent V, Yeomans E, Malone M, Pritchard J (1990) Langerhans cell histiocytosis: the case for conservative treatment. Arch Dis Child 65(3):301–303
Han I, Suh ES, Lee SH, Cho HS, Oh JH, Kim HS (2009) Management of eosinophilic granuloma occurring in the appendicular skeleton in children. Clin Orthop Surg 1(2):63–67
King JJ, Melvin JS, Iwenofu OH, Fox EJ (2009) Thigh pain in a 53-year-old woman. Clin Orthop Relat Res 467(6):1652–1657
Corby RR, Stacy GS, Peabody TD, Dixon LB (2008) Radiofrequency ablation of solitary eosinophilic granuloma of bone. AJR Am J Roentgenol 190(6):1492–1494
Osenbach RK, Youngblood LA, Menezes AH (1990) Atlanto-axial instability secondary to solitary eosinophilic granuloma of C2 in a 12-year-old girl. J Spinal Disord 3:408–412
Nesbit ME, Kieffer S, D’Angio GJ (1969) Reconstitution of vertebral height in histiocytosis X: a long-term follow-up. J Bone Joint Surg Am 51:1360–1368
Green NE, Robertson WW Jr, Kilroy AW (1980) Eosinophilic granuloma of the spine with associated neural deficit: report of three cases. J Bone Joint Surg Am 62:1198–1202
Johansson L, Larsson LG, Damber L (1995) A cohort study with regard to the risk of haematological malignancies in patients treated with X-rays for benign lesions in the locomotor system. II. Estimation of absorbed dose in the red bone marrow. Acta Oncol 34:721–726
Levy EI, Scarrow A, Hamilton RC, Wollman MR, Fitz C, Pollack IF (1999) Medical management of eosinophilic granuloma of the cervical spine. Pediatr Neurosurg 31(3):159–162
Arenzana-Seisdedos F, Barbey S, Virelizier JL, Kornprobst M, Nezelof C (1986) Histiocytosis X. Purified (T6+) cells from bone granuloma produce interleukin 1 and prostaglandin E2 in culture. J Clin Invest 77(1):326–329
Gonzalez-Crussi F, Hsueh W, Wiederhold MD (1981) Prostaglandins in histiocytosis-X. PG synthesis by histiocytosis-X cells. Am J Clin Pathol 75(2):243–253
Marusić A, Raisz LG (1991) Cortisol modulates the actions of interleukin-1 alpha on bone formation, resorption, and prostaglandin production in cultured mouse parietal bones. Endocrinology 129(5):2699–2706
Chacha PB, Khong BT (1971) Eosinophilic granuloma of bone. A diagnostic problem. Clin Orthop Relat Res 80:79–88
Jones LR, Toth BB, Cangir A (1989) Treatment for solitary eosinophilic granuloma of the mandible by steroid injection: report of a case. J Oral Maxillofac Surg 47(3):306–309
Wirtschafter JD, Nesbit M, Anderson P, McClain K (1987) Intralesional methylprednisolone for Langerhans’ cell histiocytosis of the orbit and cranium. J Pediatr Ophthalmol Strabismus 24(4):194–197
Seimon LP (1981) Eosinophil granuloma of the spine. J Pediatr Orthop 1:371–376
Ippolito E, Farsetti P, Tudisco C (1984) Vertebra plana: long-term follow-up in five patients. J Bone Joint Surg Am 66:1364–1368
Mankin HJ, Mankin CJ, Simon MA (1996) The hazards of the biopsy, revisited. Members of the Musculoskeletal Tumor Society. J Bone Joint Surg Am 78(5):656–663
Lawrence W Jr, Donegan WL, Natarajan N, Mettlin C, Beart R, Winchester D (1987) Adult soft-tissue sarcomas. A pattern of care survey of the American College of Surgeons. Ann Surg 205(4):349–359
Welker JA, Henshaw RM, Jelinek J, Shmookler BM, Malawer MM (2000) The percutaneous needle biopsy is safe and recommended in the diagnosis of musculoskeletal masses. Cancer 89(12):2677–2686
Conflict of interest
The authors declare that they have no conflict of interest. The authors did not receive any outside funding or grants in support of their research for or preparation of this work. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, division, center, clinical practice, or other charitable or non-profit organization with which the authors, or a member of their immediate families, are affiliated or associated.
About this article
Cite this article
Angelini, A., Mavrogenis, A.F., Rimondi, E. et al. Current concepts for the diagnosis and management of eosinophilic granuloma of bone. J Orthop Traumatol 18, 83–90 (2017). https://doi.org/10.1007/s10195-016-0434-7