Magnetic resonance imaging in Tietze`s syndrome
Transcription
Magnetic resonance imaging in Tietze`s syndrome
Magnetic resonance imaging in Tietze’s syndrome L. Volterrani1, M.A. Mazzei2, N. Giordano3, R. Nuti3, M. Galeazzi4, A. Fioravanti4 Department of Human Pathology and Oncology, 3Department of Internal Medicine, and 4 Rheumatology Unit, Department of Clinical and Immunological Science, University of Siena, Siena, Italy; 2Radiologia Universitaria, Policlinico Santa Maria alle Scotte, Azienda Ospedaliera Universitaria Senese, Siena, Italy. 1 Abstract Objective To evaluate the usefulness of magnetic resonance imaging (MRI) in Tietze’s ’’s syndrome which, to our knowledge, has not previously been reported in the literature. Methods Twelve consecutive outpatients with clinical features of Tietze’s ’’s syndrome underwent evaluation, including the anamnesis, clinical general examination, clinical evaluation of costosternal and sternoclavicular joints (SCJ) and biochemical and instrumental investigations. Twenty normal subjects age- and sex-matched to the patients’’ group were examined in a similar manner. MRI of costosternal and SCJ was performed using a 1.5 Tesla unit (Gyroscan NT 1.5 Philips, The Netherlands and GE Signa Excite HD, GE Healthcare, Milwaukee, Wis., USA). Results The MRI pattern of primary Tietze’s ’’s syndrome was characterized as follows: enlargement and thickening of cartilage at the site of complaint (12/12 patients); focal or widespread increased signal intensities of affected cartilage on both TSE T2-weighted and STIR or FAT SAT images (10/12 patients); bone marrow oedema in the subcondral bone (5/12 patients); vivid gadolinium uptake in the areas of thickened cartilage, in the subcondral bone marrow and/or in capsule and ligaments (10/12, 4/12 and 7/12 patients respectively). Conclusion Magnetic resonance is an excellent technique to evidence both the cartilage and bone abnormalities, therefore it represents the elective method in the investigation of primary Tietze’s ’’s syndrome, due to its high sensitivity, diagnostic reliability and biological advantages thanks to the lack of ionizing radiation. Key words Tietze’s syndrome, magnetic resonance imaging, diagnosis, costosternal joints, sternoclavicular joints. Clinical and Experimental Rheumatology 2008; 26: 848-853. MRI in Tietze’s sindrome / L. Volterrani et al. Luca Volterrani, MD, Prof. of Radiology Maria Antonietta Mazzei, MD Nicola Giordano, MD, Prof. of Rheumatology Ranuccio Nuti, MD, Prof. of Int. Medicine Mauro Galeazzi, MD, Prof. of Rheumatology Antonella Fioravanti, MD Please address correspondence and reprint requests to: Dr. Maria Antonietta Mazzei, Radiologia Universitaria, Policlinico Santa Maria alle Scotte, Azienda Ospedaliera Universitaria Senese, Viale Bracci 2, Siena 53100, Italy. E-mail: [email protected] [email protected] Received on July 26, 2007; accepted in revised form on March 19, 2008. © Copyright CLINICAL AND EXPERIMENTAL RHEUMATOLOGY 2008. Competing interests: none declared. Introduction Named in 1921 after Alexander Tietze, a German surgeon (1), Tietze’s syndrome, also known as costochondritis, is an inflammatory process involving one or more of the costochondral cartilages. Tietze’s syndrome can be defined as a benign, painful, non-suppurative, with localised swelling of the costosternal, costochondral, and/or sternoclavicular joints (SCJ) (Tietze’s area), in the absence of other causes which could be responsible for this disorder (1, 2). In most cases (80%), only one costal cartilage is involved (most commonly the second or the third rib), but other joints can be affected simultaneously (2, 3). The exact occurrence of this condition is not well known. It predominantly strikes subjects between twenty and fifty years of age, even if cases in children and the elderly have been documented (3, 4). Moreover, it has been reported that females are diagnosed with the disease more often than males by a 2:1 ratio (2). The aetiopathogenesis of Tietze’s syndrome is still being debated: the micro-traumatic theory currently seems to be the most cited one (3, 5, 6). Histological examinations of the swellings showed non-specific findings in the hyaline cartilage, consisting of an increased vascularity and degenerative changes with patchy loss of ground substance leading to a fibrillar appearance (7). Different rheumatic and non-rheumatic diseases can account for pain with or without swelling around Tietze’s area (8-15). The diagnosis of this condition is primarily clinical. Many radiological techniques have been suggested to confirm the diagnosis, but there are few studies on the value of conventional radiography (16, 17), computed tomography (CT) (18, 19), scintigraphy with 67Ga and 99mTc diphosphonate (20, 21), and ultrasound (US) (22-25). Magnetic resonance (MR) (26) is an excellent technique to show cartilaginous, joints and bone abnormalities: it has been employed in cases of chest wall pain following thoracic trauma (27), spondyloarthropathies (28), septic arthritis and malignant tumours (26, 29), which may mimic Tietze’s syndrome. The purpose of the present study was 849 to evaluate the usefulness of MR in the diagnosis of Tietze’s syndrome which, to our knowledge, has not previously been reported in the literature. Patients and methods Between July 2004 and December 2006, 12 consecutive outpatients (ten women and two men, mean age 56.08 years, age range 29 to 70 years) with Tietze’s syndrome were observed at the Rheumatology Unit (A. F. and M. G.) and the Department of Internal Medicine (N.G. and R.N.) of the University of Siena. The demographic data and clinical characteristics of the patients are summarized in Table I. The same rheumatologist performed patients’ evaluation, including the medical history, general examination and clinical evaluation of costosternal joints and SCJ. All the subjects examined had no history of thoracic trauma, aggressive exercise able to cause strain, prior upper respiratory tract infection, or either signs and/or symptoms of systemic disease. Furthermore, a series of laboratory exams including blood cell count, erythrocyte sedimentation rate, C-reactive protein, serum uric acid, lactate dehydrogenase, creatine phosphokinase (CPK), CPK-MB, troponin, rheumatoid factor, anti-cyclic citrullinated peptide antibodies and urinalysis were performed. Bacterial, viral, and mycotic cultures of blood, sputum, urine and stools were also collected, in order to exclude other pathologies. Finally, chest x-rays and electrocardiograms (ECG) were recorded for all patients. During the same period, 20 normal subjects, age and sex matched, were examined in a similar manner. The study was approved by the Ethics Committee of the School of Medicine of the University of Siena. All patients provided informed oral consent. In all the individuals examined, an MR imaging of the anterior thoracic wall was performed by using a 1.5 Tesla unit (Gyroscan NT 1.5 Philips, The Netherlands and GE Signa Excite HD, GE Healthcare, Milwaukee, Wis.) with a superficial and phased array detection receiving coil. Subjects were placed prone on the MRI table to reduce respiratory motion artefacts, arms alongside the body. MRI in Tietze’s sindrome / L. Volterrani et al. Table I. Demographic data and clinical features of patients with Tietze’s syndrome. Patient Age (year)/sex Duration of Tietze’s syndrome, when first examined (years) 1 2 3 4 5 6 7 8 9 10 70/F 62/F 56/F 62/F 64/F 56/F 58/F 42/M 58/F 29/F 2 0.6 1.6 3 1.5 2.3 0.6 0.8 0.8 1 11 12 56/F 60/M 0.6 1.8 In the pre-contrast examination, fast spin-echo T1-weighted (FSE T1) on axial or coronal planes, fast spin-echo T2-weighted (FSE T2) and T2 STIR (short time inversion recovery) or FAT SAT (saturation) sequences on coronal planes were chosen. For all sequences, slice thickness was 3-4 mm and slices were separated by 0.3-0.4 mm gaps. In all patients 0,2 ml gadolinium/kg body weight (Magnevist, Schering, Berlin, Germany) was administered and dynamic acquisition with gradient echo sequences on coronal planes were conducted with the same TR and TE as the pre-contrast scans on GE Signa MR unit. T1-weighted gadolinium-enhanced sequences with fat saturation Clinical findings Painful tender swelling of the right SCJ Painful swelling of the right SCJ Painful swelling of either SCJ Painful swelling at left first costochondral junction Painful swelling of either SCJ Painful swelling of the right SCJ Painful swelling of the right SCJ Painful of the left third costochondral junction Painful of the left SCJ Painful swelling at right third costochondral junction Painful tender swelling of the right SCJ Painful swelling of the right second costochondral junction were taken for all patients examined on the Gyroscan MR unit. The principal data of the MR sequences used are reported in Table II. The MR images were evaluated by two experienced musculoskeletal radiologists (L.V. and M.A.M.). The following MR imaging findings were evaluated: abnormal thickness and abnormal signal intensity (increased signal intensity on T2 STIR or FAT SAT weighted images) of the hyaline cartilage compared with the thickness and signal intensity of the controlateral cartilage, presence or absence of cortical bone erosion, abnormal signal intensity of subcondral bone (decreased signal intensity on T1-weighted images, increased signal intensity on Table II. Technical parameters of principal utilized MR sequences. Sequences TR (ms) TE (ms) FSE* T1 weighted 756 9 FSE T2 3500-4000 weighted TI (ms) 100-120 Section Acquisition thickness/ time (min) gap (mm) 256X512 3.00/0.3 5:54 196X256 3.00/0.3 3:33 176X256 3.00/0.3 6:45 STIR** 1400 20 FSE T1 600 10.3 384X256 4.00/0.4 5:15 3560 101 384X256 4.00/0.4 2:58 100 2-8 320X288 3.00/0.3 0.58 T2 FAT SAT*** FSPGR**** 155 Matrix (pixel) *FSE: MR unit Gyroscan NT 1.5 T Gyroscan NT 1.5 T Gyroscan NT 1.5 T GE Signa 1.5 T GE Signa 1.5 T GE Signa 1.5 T fast spin echo; **STIR: short time inversion recovery; ***SAT: saturation; ****FSPGR: fast spoiled gradient echo. 850 T2-weighted images) compared with the normal bone signal intensity, and capsular and ligament involvement. The criterion for diagnosis of cartilage enlargement used was represented by the thickened and bulbous aspect of the affected tissue compared to the opposite normal side (18). The enhancement characteristics of the abnormal tissue after gadolinium-based contrast material injections were also evaluated. The final decision regarding MR morphology as well as MR signal characteristics and enhancement of the cartilaginous, bone and joint components was done by consensus. Results Biochemical parameters, chest x-rays and electrocardiogram appeared within the normal limits for both patients and control subjects; cultures also gave negative results in patients and controls. Normal subjects Among the 20 normal subjects examined, 14 presented signs that are known to be “degenerative”: osteophytes, meniscal calcification, calcification of the costal cartilage and bone sclerosis. In order to help the reader to differentiate between normal and pathological patterns, MRI findings of normal SCJ and condrosternal joints in a young patient are shown in Figure 1 (A-E). The SCJ is formed by the sternal end of the clavicle, the clavicular notch of the manubrium sterni, and the cartilage of the first rib. It is completely divided into two articular compartments by a fibrocartilaginous disk. SCJ and costosternal cartilage size may vary with body habitus and costal cartilage level, even if the costal cartilage is normally symmetrical in size and orientation at any single level (18, 19). MR imaging showed the normal cartilage as an intermediate signal intensity on FSE T1weighted images and hypo-intense on FSE T2-weighted, STIR and FAT SAT images without enhancement in postcontrast images. The enhancement pattern of the periarticular and intra-articular structures and surrounding bone after administration of gadolinium was gradual, progressive and homogeneous. MRI in Tietze’s sindrome / L. Volterrani et al. Patients with Tietze’s ’’s syndrome The peculiar MR pattern in Tietze’s syndrome is shown in Figures 2 (A-C) and 3 (A-D). In all the subjects examined, no mass was identified at the site of complaint. The results obtained with MR are reported in Table III. In particular, enlargement and thickening of the hyaline cartilage at the site of complaint was found in 12/12 patients, focal or widespread oedema of cartilage was found in 10/12 patients, marrow oedema in the subcondral bone in 5/12 patients, vivid gadolinium uptake of the cartilage, the subcondral bone and capsular components in 10/12, 4/12 and 7/12 patients respectively. Both TSE T2-weighted and STIR or FAT SAT images showed thickened cartilage with focal or widespread increased signal intensity. Bone marrow oedema was often noticeable in the subcondral bone of the involved cartilage; in addition, in post-contrast MR images, vivid gadolinium uptake was present in the areas of thickened cartilage, in the subcondral bone marrow and/or in the other peri-articular components. Fig. 1. 35-year-old woman without involvement of anterior chest wall. Images show normal MR appearance of the SCJ and condrosternal joints on coronal T1-weighted MR image (A) coronal T2weighted MR image (B). Coronal T2 STIR image (C) and normal MR appearance of the SCJ and of the condrosternal joints on axial T1- weighted MR image respectively (D and E). Fig. 2. 62-year-old woman with painful swelling at left first condrosternal junction. A. axial T1-weighted MR image shows enlargement of the left first cartilage (black arrow). B and C, coronal FSE T2 and STIR images, respectively, show oedema in the subcondral bone of the sternum (black arrows). 851 Discussion In the present study, we examined 12 consecutive outpatients with clinical characteristics of Tietze’s syndrome, 10 females and 2 males, aged between 29 and 70 years. The findings confirm the data already found in the literature (2, 3) on the high prevalence of the disease in adults and in the female gender. As previously reported (2, 3), also in our cases Tietze’s syndrome was prevalently monolateral (10/12) and more often affected the right ribs (2/12) or the right SCJ (7/12), probably due to its microtraumatic aetiology (3). Analysing the literature on Tietze’s syndrome, we noted that costosternal, costochondral and SCJ involvement, often neglected in the past, has recently been the object of a great deal of interest, probably due to recent reports of the anterior chest wall involvement in many rheumatic diseases, in particular in spondyloarthritis, psoriatic arthritis, sternoclavicular hyperostosis, and SAPHO syndrome (8, 10, 14, 28, 30). Tietze’s syndrome is included in the differential diagnosis of visceral anterior MRI in Tietze’s sindrome / L. Volterrani et al. in echogenicity and thickness of pathological cartilage compared to the opposite normal side. Furthermore, it shows in real time the topographic correspondence between the cartilage alterations and the painful swelling, increased by digital pressure. This technique, however, has some limits as it does not allow an immediate comparison between the two sides; this is due mainly to technical reasons. In particular, the 7-12 MHz linear scanner usually utilized is not wide enough to scan simultaneously the two sides so that the comparison is only possible by flanking the images obtained separately. Moreover, this technique depends strongly on the operator and it is not suitable for getting a clear image of the complex anatomy of the SCJ and condrosternal joints; the above-mentioned joints’ anatomy is well shown by CT and MR imaging. Edelstein et al. (18) proved the usefulness of CT in the evaluation of six patients with clinical features of Tietze’s syndrome: the spectrum of CT findings includes focal cartilage enlargement, ventral angulations of the costal cartilage and normal anatomic features. The author (18) concluded affirming that CT is able to show the costal cartilage, bone and adjacent structures and to define the characteristics of the mass noted during the clinical exam. Even if MR is an excellent technique for highlighting cartilage and bone abnormalities (26, 28), its value in the diagnosis of Tietze’s syndrome Fig. 3. 70-year-old woman with painful tender swelling of the right SCJ. A and B coronal T2-weighted and T2 FAT SAT MR images show enlarged right SCJ cartilage (white arrow) with abnormal signal intensity (increased signal intensity on T2-weighted images) of the hyaline cartilage (black arrows) and focal area of oedema in the subcondral bone of the sternal end of the right clavicle (white thin arrow). C and D axial T1-weighted images before and after intravenous administration of gadolinium, respectively, show enlarged right SCJ cartilage and contrast enhancement of affected cartilage and capsular components (black thin arrows). chest wall pain (31, 32). Many diagnostic techniques have been used to investigate Tietze’s syndrome, but only a few studies have analysed and compared the suitability of radiography (16, 17), CT (18, 19), scintigraphy (20, 21), and US (22-25). In many cases, conventional radiological methods (standard x-rays, conventional tomography) (16,17) help to exclude bone lesions, but they are not able to show cartilage damage. Scintigraphy (19, 20) shows an abnormal accumulation of 67Gallium and 99mTc diphosphonate at the level of the involved joint, but this technique is un-specific and is unable to represent different components of the examined joint. US (2225) shows an inhomogeneous increase Table III. Pathological MR findings. Patient Site of complaint 1 right SCJ 2 right SCJ Enlargement and thickening of hyaline cartilage Y Y Y Focal or widespread oedema of cartilage – Y – Bone marrow oedema in the subcondral bone Y Y Y (left) Gadolinium uptake of subcondral bone Y Y Y Y Y Gadolinium uptake of cartilage Gadolinium uptake of capsular components Y Y 3 4 5 either left first either SCJ costochondral SCJ junction Y (particular left side) 6 right SCJ 7 8 9 10 11 12 right left third left right third right right second SCJ costochondral SCJ costochondral SCJ costochonjunction junction dral junction Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y – Y – – – – – – Y low Y – low Y Y Y Y – – – Y Y Y low Y Y Y – Y – – – Y Y= yes. 852 – – – – MRI in Tietze’s sindrome / L. Volterrani et al. has not been amply investigated. In the present study, we have reported the spectrum of MR findings in twelve patients with clinical characteristics of Tietze’s syndrome; to our knowledge similar studies are not present in literature until now. MR images revealed a characteristic spectrum of abnormalities in patients with Tietze’s syndrome compared with MR images taken in normal subjects. In detail, the specific MR findings were represented by focal cartilage enlargement, oedema of the cartilage and the subcondral bone, vivid and rapid contrast enhancement of the cartilage and peri-articular structures involved. These MR findings confirmed the histological observations of hypervascularization and degeneration of the hyaline cartilage, reported by Cameron and Fornasier (7). Normal cartilage is not vascularised, however the authors described one case of Tietze’s syndrome, histologically examined, and documented a blood vessel in a central area of cartilage degeneration. Furthermore they described columns of cartilage, indicating proliferative activity, at the periphery of the shaving. Probably it is possible to assume that the hypertrophic changes of the cartilage should be coupled with angiogenesis, as showed in our investigation by vivid gadolinium enhancement of the cartilage in post-contrast MR images. This observation is in accordance to recent studies that describe the osteochondral junction angiogenesis in osteoarthritis (33, 34). Our study demonstrated that MR images were able to show changes in cartilage and bone marrow oedema, which could not be revealed by CT. We believe that the greatest advantages of using MR compared to other techniques, are the capacity to detect damage of the cartilaginous components and sub-condral bone in the form of oedema and the vivid contrast enhancement after gadolinium-based injections. 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