Abstract
The synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome includes a group of chronic, relapsing, inflammatory musculoskeletal disorders with similar manifestations, in particular synovitis, hyperostosis, and osteitis, which may or may not be associated with neutrophilic skin eruptions such as palmoplantar pustulosis and acne conglobata. The syndrome occurs at any age, can involve any skeletal site, and its imaging appearances are variable, depending on the stage/age of the lesion and imaging method. The diagnosis is difficult if there is no skin disease. Awareness of the imaging appearances, especially in the spine, may help the radiologist in avoiding misdiagnosis (e.g., infection, tumor) and unnecessary invasive procedures, while facilitating early diagnosis and selection of an effective treatment. In this article, we provide an overview of the radiological appearances of SAPHO syndrome, focusing on the magnetic resonance imaging findings of vertebral involvement, and present relevant clinical and pathological features that assist early diagnosis.
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Windom RE, Sandford JP, Ziff M. Acne conglobata and arthritis. Arthritis Rheum. 1961;4:632–5.
Kato T, Kambara H, Hoshi E. Case of bilateral clavicular osteomyelitis with palmar and plantar pustulosis. Seikei Geka. 1968;19:590–3.
Giedion A, Holthusen W, Masel LF, et al. Subacute and chronic “symmetrical” osteomyelitis. Ann Radiol (Paris). 1972;15:329–42.
Köhler H, Uehlinger E, Kutzner J, et al. Sterno-costo-clavicular hyperostosis: a hitherto undescribed entity (author’s translation). Dtsch Med Wochenschr. 1975;100:1519–23.
Björkstén B, Gustavson KH, Eriksson B, et al. Chronic recurrent multifocal osteomyelitis and pustulosis palmoplantaris. J Pediatr. 1978;93:227–31.
Bergdahl K, Björkstén B, Gustavson KH, et al. Pustulosis palmoplantaris and its relation to chronic recurrent multifocal osteomyelitis. Dermatologica. 1979;159:37–45.
Sonozaki H, Azuma A, Okai K, et al. Clinical features of 22 cases with “inter-sterno-costo-clavicular ossification”. A new rheumatic syndrome. Arch Orthop Trauma Surg. 1979;95:13–22.
Sonozaki H, Mitsui H, Miyanaga Y, et al. Clinical features of 53 cases with pustulotic arthro-osteitis. Ann Rheum Dis. 1981;40:547–53.
Dihlmann W, Dihlmann SW. Acquired hyperostosis syndrome: spectrum of manifestations at the sternocostoclavicular region. Radiologic evaluation of 34 cases. Clin Rheumatol. 1991;10:250–63.
Lindor NM, Arsenault TM, Solomon H, Seidman CE, McEvoy MT. A new autosomal dominant disorder of pyogenic sterile arthritis, pyoderma gangrenosum, and acne: PAPA Syndrome. Mayo Clin Proc. 1997;72:611–5.
Tlougan BE, Podjase JO, O’Haver J, et al. Chronic recurrent multifocal osteomyelitis (CRMO) and synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome with associated neutrophilic dermatoses: a report of seven cases and review of the literature. Pediatr Dermatol. 2009;26(5):497–505.
Siau K, Laversuch CJ. SAPHO syndrome in an adult with ulcerative colitis responsive to intravenous pamidronate: a case report and review of the literature. Rheumatol Int. 2010;30:1085–8.
Chamot AM, Benhamou CL, Kahn MF, et al. Acne–pustulosis–hyperostosis–osteitis syndrome. Results of a national survey. 85 cases. Rev Rhum Mal Osteoartic. 1987;54:187–96.
Boutin RD, Resnick D. The SAPHO syndrome: an evolving concept for unifying several idiopathic disorders of bone and skin. AJR Am J Roentgenol. 1998;170(3):585–91.
Depasquale R, Kumer N, Lalam RK, et al. SAPHO: what radiologists should know. Clin Radiol. 2012;67:195–206.
Assmann G, Simon P. The SAPHO syndrome—are microbes involved? Best Pract Res Clin Rheumatol. 2011;25(3):423–37.
Assmann G, Kueck O, Kirchhoff T, et al. Efficacy of antibiotic therapy for SAPHO syndrome is lost after its discontinuation: an interventional study. Arthritis Res Ther. 2009;11:R140.
Govoni M, Colina M, Massara A, Trotta F. SAPHO syndrome and infections. Autoimmun Rev. 2009;8:256–9.
Colina M, La Corte R, Trotta F. Sustained remission of SAPHO syndrome with pamidronate: a follow-up of fourteen cases and review of the literature. Clin Exp Rheumatol. 2009;27:112–5.
Edlund E, Johnsson U, Lidgren L, et al. Palmoplantar pustulosis and sternocostoclavicular arthro-osteitis. Ann Rheum Dis. 1988;47:809–15.
Trimble BS, Evers CJ, Ballaron SA, Young JM. Intraarticular injection of Propionibacterium acnes causes an erosive arthritis in rats. Agents Actions. 1987;21:281–3.
Colina M, Lo Monaco A, Khodeir M, Trotta F. Propionibacterium acnes and SAPHO syndrome: a case report and literature review. Clin Exp Rheumatol. 2007;25:457–60.
Hayem G. Valuable lessons from SAPHO syndrome. Joint Bone Spine. 2007;74:123–6.
Amital H, Govoni M, Maya R, et al. Role of infectious agents in systemic rheumatic diseases. Clin Exp Rheumatol. 2008;26(1 Suppl 48):S27–32.
Rozin AP. From molecular mimicry to cross-reactivity or pathogen expansion? A hypothesis. Clin Rheumatol. 2007;26:285–8.
Rozin AP. SAPHO syndrome: is a range of pathogen-associated rheumatic diseases extended? Arthritis Res Ther. 2009;11(6):131.
Barton GM, Medzhitov R. Toll-like receptor signaling pathways. Science. 2003;300(5625):1524–5.
Kalis C, Gumenscheimer M, Freudenberg N, et al. Requirement of TLR9 in the immunomodulatory activity of P. acnes. J Immunol. 2005;174:4295–300.
Hurtado-Nedelec M, Chollet-Martin S, Chapeton D, Hugot JP, Hayem G, Gérard B. Genetic susceptibility factors in a cohort of 38 patients with SAPHO syndrome: a study of PSTPIP2, NOD2, and LPIN2 genes. J Rheumatol. 2010;37:401–9.
Wagner AD, Andresen J, Jendro MC, Hulsemann JL, Zeidler H. Sustained response to tumor necrosis factor alpha-blocking agents in two patients with SAPHO syndrome. Arthritis Rheum. 2002;46:1965–8.
Carpenter E, Jackson MA, Friesen CA, Scarbrough M, Roberts CC. Crohn’s-associated chronic recurrent multifocal osteomyelitis responsive to infliximab. J Pediatr. 2004;144:541–4.
Olivieri I, Padula A, Ciancio G, Salvarani C, Niccoli L, Cantini F. Successful treatment of SAPHO syndrome with infliximab: report of two cases. Ann Rheum Dis. 2002;61:375–6.
Jappe U, Boit R, Farrar MD, Ingham E, Sandoe J, Holland KT. Evidence for diversity with Propionibacterium acnes: a comparison of the T cell stimulatory activity of isolates from inflammatory acne, endocarditis and the laboratory. J Eur Acad Dermatol Venereol. 2004;18:450–4.
Jansson A, Renner ED, Ramser J, et al. Classification of non-bacterial osteitis: retrospective study of clinical, immunological and genetic aspects in 89 patients. Rheumatology (Oxford). 2007;46:154–60.
Ferguson PJ, Chen S, Tayeh MK, et al. Homozygous mutations in LPIN2 are responsible for the syndrome of chronic recurrent multifocal osteomyelitis and congenital dyserythropoietic anaemia (Majeed syndrome). J Med Genet. 2005;42:551–7.
El-Shanti HI, Ferguson PJ. Chronic recurrent multifocal osteomyelitis: a concise review and genetic update. Clin Orthop Relat Res. 2007;462:11–9.
Yeon HB, Lindor NM, Seidman JG, Seidman CE. Pyogenic arthritis, pyoderma gangrenosum, and acne syndrome maps to chromosome 15q. Am J Hum Genet. 2000;66:1443–8.
Li J, Nishizawa K, An W, Hussey RE, Lialios FE, Salgia R, et al. A cdc15-like adaptor protein (CD2BP1) interacts with the CD2 cytoplasmic domain and regulates CD2-triggered adhesion. EMBO J. 1998;17:7320–36.
Baum W, Kirkin V, Mateus Fernandez SB, et al. Binding of the intracellular Fas ligand (FasL) domain to the adaptor protein PSTPIP results in a cytoplasmic localization of FasL. J Biol Chem. 2005;280:4012–24.
Ferguson PJ, Bing X, Vasef MA, et al. A missense mutation in pstpip2 is associated with the murine autoinflammatory disorder chronic multifocal osteomyelitis. Bone. 2006;38:41–7.
Byrd L, Grossmann M, Potter M, Shen-Ong G. Chronic multifocal osteomyelitis, a new recessive mutation on chromosome 18 of the mouse. Genomics. 1991;11:794–8.
Colina M, Govoni M, Orzincolo C, Trotta F. Clinical and radiologic evolution of synovitis, acne, pustulosis, hyperostosis, and osteitis syndrome: a single center study of a cohort of 71 subjects. Arthritis Rheum. 2009;61:813–21.
Hayem G, Bouchaud-Chabot A, Benali K, et al. SAPHO syndrome: a long-term follow-up study of 120 cases. Semin Arthritis Rheum. 1999;29:159–71.
Mann B, Shaerf DA, Sheeraz A, et al. SAPHO syndrome presenting as widespread bony metastatic disease of unknown origin. Rheumatol Int. 2012;32(2):505–7.
Sallés M, Olivé A, Perez-Andres R, et al. The SAPHO syndrome: a clinical and imaging study. Clin Rheumatol. 2011;30:245–9.
Kahn MF, Khan MA. The SAPHO syndrome. Baillieres Clin Rheumatol. 1994;8:333–62. Semin Arthritis Rheum 1999;293:159–171.
Takigawa T, Tanaka M, Nakahara S, et al. SAPHO syndrome with rapidly progressing destructive spondylitis: two cases treated surgically. Eur Spine J. 2008;17 Suppl 2:S331–7.
Magrey M, Khan MA. New insights into synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome. Curr Rheumatol Rep. 2009;11:329–33.
Van Doornum S, Barraclough D, McColl G, Wicks I. SAPHO: rare or just not recognized? Semin Arthritis Rheum. 2000;30:70–7.
Earwaker JWS, Cotten A. SAPHO: syndrome or concept? Imaging findings. Skelet Radiol. 2003;32:311–27.
Karadag-Saygi E, Gunduz OH, Gumrukcu G, et al. SAPHO syndrome: misdiagnosed and operated. Acta Reumatol Port. 2008;33:460–3.
Court C, Charlez C, Molina V, et al. Isolated thoracic spine lesion: is this the presentation of a SAPHO syndrome? A case report. Eur Spine J. 2005;14:711–5.
Mandell GA, Contreras SJ, Conard K, Harcke HT, Maas KW. Bone scintigraphy in the detection of chronic recurrent multifocal osteomyelitis. J Nucl Med. 1998;39:1778–83.
Khanna L, El-khoury GY. SAPHO syndrome—a pictorial assay. Iowa Orthop J. 2012;32:189–95.
Callen JP. Neutrophilic dermatoses. Dermatol Clin. 2002;20:409–19.
Cotten A, Flipo RM, Mentre A, et al. SAPHO syndrome. Radiographics. 1995;15:1147–54.
Sugimoto H, Tamura K, Fujii T. The SAPHO syndrome: defining the radiological spectrum of disease comprising the syndrome. Eur Radiol. 1998;8:800–6.
Benhamou CL, Chamot AM, Kahn MF. Synovitis-acne-pustulosis-hyperostosis-osteomyelitis syndrome (SAPHO). A new syndrome among the spondyloarthropathies? Clin Exp Rheumatol. 1988;6:109–12.
Maugars Y, Berthelot JM, Ducloux JM, et al. SAPHO syndrome: a follow-up study of 19 cases with special emphasis on enthesis involvement. J Rheumatol. 1995;22:2135–41.
Fritz J, Tzaribatchev N, Claussen CD, et al. Chronic recurrent multifocal osteomyelitis: comparison of whole-body MR imaging with radiography and correlation with clinical and laboratory data. Radiology. 2009;252:842–51.
Nguyen MT, Borchers A, Selmi C, Naguwa SM, Cheema G, Gershwin ME. The SAPHO syndrome. Semin Arthritis Rheum. 2012;42:254–65.
Guérin-Pfyffer S, Guillaume-Czitrom S, Tammam S, Koné-Paut I. Evaluation of chronic recurrent multifocal osteitis in children by whole-body magnetic resonance imaging. Joint Bone Spine. 2012;79(6):616–20.
Weckbach S. Whole-body MRI for inflammatory arthritis and other multifocal rheumatoid diseases. Semin Musculoskelet Radiol. 2012;16(5):377–88.
Freyschmidt J, Sternberg A. The bullhead sign: scintigraphic pattern of sternocostoclavicular hyperostosis and pustulotic arthroosteitis. Eur Radiol. 1998;8:807–12.
Pichler R, Weiglein K, Schmekal B, Sfetsos K, Maschek W. Bone scintigraphy using Tc-99m DPD and F18-FDG in a patient with SAPHO syndrome. Scand J Rheumatol. 2003;32:58–60.
Inoue K, Yamaguchi T, Ozawa H, et al. Diagnosing active inflammation in the SAPHO syndrome using 18FDG-PET/CT in suspected metastatic vertebral bone tumors. Ann Nucl Med. 2007;21(8):477–80.
Takeuchi K, Matsusita M, Takagishi K. A case of SAPHO (synovitis-acne-pustulosis-hyperostosis-osteomyelitis) syndrome in which [18F]fluorodeoxyglucose positron emission tomography was useful for differentiating from multiple metastatic bone tumors. Mod Rheumatol. 2007;17(1):67–71.
Patel CN, Smith JT, Rankine JJ, et al. F-18 FDG PET/CT can help differentiate SAPHO syndrome from suspected metastatic bone disease. Clin Nucl Med. 2009;34:254–7.
Canbaz F, Gonullu G, Baris S, Selcuk MB, Bicakci N. SAPHO syndrome without dermatologic manifestations: multifocal uptake mismatch on 99mTc-MDP and 18F-FDG-PET/CT imaging. Hell J Nucl Med. 2010;13(1):73–5.
Adams MC, Turkington TG, Wilson JM, Wong TZ. A systematic review of the factors affecting accuracy of SUV measurements. AJR Am J Roentgenol. 2010;195(2):310–20.
van Holsbeeck M, Martel W, Dequeker J, et al. Soft tissue involvement, mediastinal pseudotumor, and venous thrombosis in pustulotic arthroosteitis. A study of eight new cases. Skelet Radiol. 1989;18:1–8.
Girschick HJ, Krauspe R, Tschammler A, Huppertz HI. Chronic recurrent osteomyelitis with clavicular involvement in children: diagnostic value of different imaging techniques and therapy with non-steroidal anti-inflammatory drugs. Eur J Pediatr. 1998;157:28–33.
Khanna G, Sato TS, Ferguson P. Imaging of chronic recurrent multifocal osteomyelitis. Radiographics. 2009;29(4):1159–77.
Toussirot E, Dupond JL, Wendling D. Spondylodiscitis in SAPHO syndrome. A series of eight cases. Ann Rheum Dis. 1997;56:52–8.
Laredo JD, Vuillemin-Bodaghi V, Boutry N, Cotton A, Parlier-Cuau C. SAPHO syndrome: MR appearance of vertebral involvement. Radiology. 2007;242(3):825–31.
Romanus R, Yden S. Destructive and ossifying spondylitic changes in rheumatoid ankylosing spondylitis (pelvospondylitis ossificans). Acta Orthop Scand. 1952;22:88–99.
Hermann KG, Althoff CE, Schneider U, et al. Spinal changes in patients with spondyloarthritis: comparison of MR imaging and radiographic appearances. RadioGraphics. 2005;253:559–69.
Jevtic V, Kos-Golja M, Rozman B, McCall I. Marginal erosive discovertebral “Romanus” lesions in ankylosing spondylitis demonstrated by contrast enhanced Gd-DTPA magnetic resonance imaging. Skelet Radiol. 2000;29:27–33.
Bennet AN, Rehman A, Hensor EM, Marzo-Ortega H, Emery P, McGonagle D. The fatty Romanus lesion: a non-inflammatory spinal MRI lesion specific for axial spondyloarthropathy. Ann Rheum Dis. 2010;69(5):891–4.
Nachtigal A, Cardinal E, Bureau NJ, Sainte-Marie LG, Milette F. Vertebral involvement in SAPHO syndrome: MRI findings. Skelet Radiol. 1999;28:163–8.
Remedios D, Natali C, Saifuddin A. Case report: MRI of vertebral osteitis in early ankylosing spondylitis. Clin Radiol. 1998;53:534–6.
Jevtic V, Rozman B, Kos-Golja M, Watt I. MR imaging in seronegative spondyloarthritis. Radiologe. 1996;36:624–31.
Marc V, Dromer C, Le Guennec P, Manelfe C, Fournie B. Magnetic resonance imaging and axial involvement in spondylarthropathies: delineation of the spinal entheses. Rev Rhum (Engl Ed). 1997;64:465–73.
Lacout A, Rousselin B, Pelage JP. CT and MRI of spine and sacroiliac involvement in spondyloarthropathy. Am J Roentgenol. 2008;191:1016–23.
Kotilainen P, Gullichsen RE, Saario R, Manner I, Kotilainen E. Aseptic spondylitis as the initial manifestation of the SAPHO syndrome. Eur Spine J. 1997;6(5):327–9.
Sweeney SA, Kumar VA, Tayar J, et al. Case 181: synovitis acne pustulosis hyperostosis osteitis (SAPHO) syndrome. Radiology. 2012;263(2):613–7.
Nikolaisen C, Nossent H. Early histology in ankylosing spondylitis related spondylodiscitis supports its inflammatory origin. Scand J Rheumatol. 2005;34(5):396–8.
Tohme-Noun C, Feydy A, Belmatoug N, Krainik A, Fantin B, Menu Y. Cervical involvement in SAPHO syndrome: imaging findings with a 10-year follow-up. Skelet Radiol. 2003;32:103–6.
Andersson O. Röntgenbilden vid spondylarthritis ankylopoetica. Nord Med Tidskr. 1937;14:2000–2.
Langlois S, Cedoz JP, Lohse A, Toussirot E, Wendling D. Aseptic discitis in patients with ankylosing spondylitis: a retrospective study of 14 cases. Joint Bone Spine. 2005;72(3):248–53.
Bron JL, de Vries MK, Snieders MN, van der Horst-Bruinsma IE, van Royen BJ. Discovertebral (Andersson) lesions of the spine in ankylosing spondylitis revisited. Clin Rheumatol. 2009;28(8):883–92.
Yu L, Kasser JR, O’Rourke E, Kozakewich H. Chronic recurrent osteomyelitis. Association with vertebra plana. J Bone Joint Surg Am. 1989;71:105–12.
Jurik AG, Egund N. MRI in chronic recurrent multifocal osteomyelitis. Skelet Radiol. 1997;26:230–8.
Demharter J, Bohndorf K, Michl W, Vogt H. Chronic recurrent multifocal osteomyelitis: a radiological and clinical investigation of five cases. Skelet Radiol. 1997;26:579–88.
Anderson SE, Heini P, Sauvain MJ. Imaging of chronic recurrent multifocalosteomyelitis of childhood first presenting with isolated primary spinal involvement. Skelet Radiol. 2003;32(6):328–36.
Huber AM, Lam PY, Duffy CM, et al. Chronic recurrent multifocal osteomyelitis: clinical outcomes after more than 5 years of follow-up. J Pediatr. 2002;141:198–203.
Manson D, Wilmot DM, King S, Laxer RM. Physeal involvement in chronic recurrent multifocal osteomyelitis. Pediatr Radiol. 1989;20:76–9.
Beretta-Piccoli BC, Sauvain MJ, Gal I, et al. Synovitis, acne, pustulosis, hyperostosis, osteitis (SAPHO) syndrome in childhood: a report of ten cases and review of the literature. Eur J Pediatr. 2000;159:594–601.
Kodama Y, Tanaka R, Kurokawa A. Severe destruction of the temporomandibular joint with complete resorption of the condyle associated with synovitis, acne, pustulosis, hyperostosis, and osteitis syndrome. Oral Surg Oral Med Oral Pathol Oral Radiol. 2013;116(2):e128–33.
Müller-Richter UD, Roldán JC, Mörtl M, Behr M, Reichert TE, Driemel O. SAPHO syndrome with ankylosis of the temporomandibular joint. Int J Oral Maxillofac Surg. 2009;38(12):1335–41.
Björkstén B, Boquist L. Histopathological aspects of chronic recurrent multifocal osteomyelitis. J Bone Joint Surg (Br). 1980;62:376–80.
Reith JD, Bauer TW, Schils JP. Osseous manifestations of SAPHO (synovitis, acne, pustulosis, hyperostosis, osteitis) syndrome. Am J Surg Pathol. 1996;20:1368–77.
Chow LT, Griffith JF, Kumta SM, Leung PC. Chronic recurrent multifocal osteomyelitis: a great clinical and radiologic mimic in need of recognition by the pathologist. APMIS. 1999;107:369–79.
Rozin AP, Nahir AM. Is SAPHO syndrome a target for antibiotic therapy? Clin Rheumatol. 2007;26:817–20.
Ballara SC, Siraj QH, Maini RN, Venables PJ. Sustained response to doxycycline therapy in two patients with SAPHO syndrome. Arthritis Rheum. 1999;42:819–21.
Schilling F, Wagner AD. Azithromycin: an anti-inflammatory effect in chronic recurrent multifocal osteomyelitis? A preliminary report. Z Rheumatol. 2000;59:352–3.
Just A, Adams S, Brinkmeier T, et al. Successful treatment of primary chronic osteomyelitis in SAPHO syndrome with bisphosphonates. Dtsch Dermatol Ges. 2008;6(8):657–60.
Amital H, Applbaum YH, Aamar S, Daniel N, Rubinow A. SAPHO syndrome treated with pamidronate: an open-label study of 10 patients. Rheumatology (Oxford). 2004;43(5):658–61.
Solau-Gervais E, Soubrier M, Gerot I, et al. The usefulness of bone remodelling markers in predicting the efficacy of pamidronate treatment in SAPHO syndrome. Rheumatology (Oxford). 2006;45:339–42.
Whyte MP, Wenkert D, Clements KL, McAlister WH, Mumm S. Bisphosphonate-induced osteopetrosis. N Engl J Med. 2003;349:457–63.
Chang JT, Green L, Beitz J. Renal failure with the use of zoledronic acid. N Engl J Med. 2003;349:1676–9.
Rogers MJ, Gordon S, Benford HL, et al. Cellular and molecular mechanisms of action of bisphosphonates. Cancer. 2000;88(12 Suppl):2961–78.
Arias-Santiago S, Sanchez-Cano D, Callejas-Rubio JL, et al. Adalimumab treatment for SAPHO syndrome. Acta Derm Venereol. 2010;90:301–2.
Deutschmann A, Mache CJ, Bodo K, et al. Successful treatment of chronic recurrent multifocal osteomyelitis with tumor necrosis factor-alpha blockage. Pediatrics. 2005;116:1231–3.
Ben Abdelghani K, Dran DG, Gottenberg JE, et al. Tumor necrosis factor alpha blockers in SAPHO syndrome. J Rheumatol. 2010;37:1699–704.
Moll C, Hernández MV, Cañete JD, et al. Ilium Osteitis as the main manifestation of the SAPHO syndrome: response to infliximab therapy and review of the literature. Semin Arthritis Rheum. 2008;37(5):299–306.
Braun J, Baraliakos X, Brandt J, Listing J, Zink A, Alten R, et al. Persistent clinical response to the anti-TNF-alpha antibody infliximab in patients with ankylosing spondylitis over 3 years. Rheumatology. 2005;44:670–6.
Wollina U, Hansel G, Koch A, Schönlebe J, Köstler E, Haroske G. Tumor necrosis factor-alpha inhibitor-induced psoriasis or psoriasiform exanthemata: first 120 cases from the literature including a series of six new patients. Am J Clin Dermatol. 2008;9:1–14.
Aksentijevich I, Masters SL, Ferguson PJ, et al. An autoinflammatory disease with deficiency of the interleukin-1-receptor antagonist. N Engl J Med. 2009;360:2426–37.
Reddy S, Jia S, Geoffrey R, et al. An autoinflammatory disease due to homozygous deletion of the IL1RN locus. N Engl J Med. 2009;360:2438–44.
Burgermeister LT, Baeten DL, Tas SW. Biologics for rare inflammatory diseases: TNF blockade in the SAPHO syndrome. Neth J Med. 2012;70(10):444–9.
Ferguson PJ, Sandu M. Current understanding of the pathogenesis and management of chronic recurrent multifocal osteomyelitis. Curr Rheumatol Rep. 2012;14(2):130–41.
Rech J, Manger B, Lang B, Schett G, Wilhelm M, Birkmann J. Adult-onset Still’s disease and chronic recurrent multifocal osteomyelitis: a hitherto undescribed manifestation of autoinflammation. Rheumatol Int. 2012;32(6):1827–9.
Colina M, Pizzirani C, Khodeir M, et al. Dysregulation of P2X7 receptor-inflammasome axis in SAPHO syndrome: successful treatment with anakinra. Rheumatology. 2010;49:1416–8.
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Leone, A., Cassar-Pullicino, V.N., Casale, R. et al. The SAPHO syndrome revisited with an emphasis on spinal manifestations. Skeletal Radiol 44, 9–24 (2015). https://doi.org/10.1007/s00256-014-2025-0
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DOI: https://doi.org/10.1007/s00256-014-2025-0