Diagnostic yield of image-guided biopsy in patients with suspected infectious spondylodiscitis

Aims The aims of this study were to determine the diagnostic yield of image-guided biopsy in providing a final diagnosis in patients with suspected infectious spondylodiscitis, to report the diagnostic accuracy of various microbiological tests and histological examinations in these patients, and to report the epidemiology of infectious spondylodiscitis from a country where tuberculosis (TB) is endemic, including the incidence of drug-resistant TB. Methods A total of 284 patients with clinically and radiologically suspected infectious spondylodiscitis were prospectively recruited into the study. Image-guided biopsy of the vertebral lesion was performed and specimens were sent for various microbiological tests and histological examinations. The final diagnosis was determined using a composite reference standard based on clinical, radiological, serological, microbiological, and histological findings. The overall diagnostic yield of the biopsy, and that for each test, was calculated in light of the final diagnosis. Results The final diagnosis was tuberculous spondylodiscitis in 250 patients (88%) and pyogenic spondylodiscitis in 22 (7.8%). Six (2.1%) had a noninfectious condition-mimicking infectious spondylodiscitis, and six (2.1%) had no definite diagnosis and improved without specific treatment. The diagnosis was made by image-guided biopsy in 152 patients (56%) with infectious spondylodiscitis. Biopsy was contributory in identifying 132/250 patients (53%) with tuberculous spondylodiscitis, and 20/22 patients (91%) with pyogenic spondylodiscitis. Histological examination was the most sensitive diagnostic modality, followed by Xpert MTB/RIF assay. Conclusion Image-guided biopsy has a reasonably high diagnostic yield in patients with suspected infectious spondylodiscitis. A combination of histological examination, Xpert MTB/RIF assay, bacterial culture, and sensitivity provides high diagnostic accuracy in a country in which TB is endemic. Cite this article: Bone Joint J 2022;104-B(1):120–126.

A Case of Restrictive Lung Disease Masquerading as Sars-Cov-2 Pneumonia: The Complexity of Integrating Lung Ultrasound in Clinical Management

This report aims to highlight the importance of integrating the lung ultrasound findings in the clinical judgement, and to integrate its findings, exemplified in this patient, thought to have COVID-19 bilateral pneumonia, and turn out to have an infectious spondylodiscitis and secondary, a restrictive lung disease.As ultrasound devices become increasingly portable and affordable, the future potential of lung ultrasound relies on a not lesser degree of clinical skills acquisition.

SAPHO Syndrome Mimicking Infectious Spondylodiscitis and Bone Metastasis

The acronym SAPHO (synovitis, acne, pustulosis, hyperostosis, and osteitis) includes diseases with similar osteoarticular manifestations and skin conditions. Making this diagnosis is not always obvious, especially when the clinical presentation does not fit the typical pattern of the disease or it occurs in a particular field. We described three cases where the diagnosis was difficult. A 46 year-old woman presented with cervical pain. The cervical X-ray showed the aspect of an ivory C5 vertebra. The patient had, however, preserved general condition, no signs of underlying neoplasia, nor other joint complaints. Blood analysis was normal. Tomography did not find any suspect lesion but showed sclerosis and hyperostosis of the manubrium. Scintigraphy showed the characteristic “bullhead” appearance. A 61-year-old woman had thoracic and lumbar pain. MRI showed spondylodiscitis in D3-D4, D4-D5, D5-D6, D6-D7, and L1-L2 with paraspinal soft tissue involvement, simulating infectious spondylodiscitis. Infectious investigations and discovertebral biopsy performed twice were negative. SAPHO syndrome was then suspected. Bone scintigraphy showed uptake in the chondrosternal articulations and D4 to D7 vertebrae. The diagnosis of SAPHO was established. The third case was a 46-year-old man with a lung adenocarcinoma. Staging for metastatic disease, a TAP tomography was performed and showed osteosclerosis of D8 to D12 and intra-articular bridges in the sacroiliac joints. MRI and scintigraphy eliminated malignancy and confirmed the diagnosis of SAPHO. In our cases, imaging findings could facilitate differentiating SAPHO syndrome from other diseases.

Bugs and bones: a study of 25 cases of infectious spondylodiscitis

Background: Infectious spondylodiscitis (IS) is an illness that presents a diagnostic dilemma. It is often associated with significant neurological morbidity, hence early diagnosis and treatment is crucial. As only a few Indian studies have dealt with IS, our study analyses the unique clinico-epidemiological profile of this disease in India and assesses the current management trends and outcome in these patients.Methods: A retrospective study of 25 cases of microbiologically confirmed IS in a single unit at a tertiary care hospital over an 18-month period (January 2018 to June 2019).Results: A total of 25 cases of IS were considered with a mean age of 49 years. Among the cases of non-tubercular spondylodiscitis (NTS), the organisms isolated were methicillin-resistant Staphylococcus aureus (MRSA), Brucella, Escherichia coli and Citrobacter. The average time taken from onset of symptoms to diagnosis was 3 months in tubercular spondylodiscitis (TS) cases and 5 months in NTS cases. Neurological complications were seen in 32% of the patients. Magnetic resonance imaging (MRI) was the imaging modality used to confirm diagnosis in up to 80% of the patients. Medical and surgical management were required in 84% of the cases.Conclusions: The clinical conundrum in IS primarily due to its atypical presentation. The higher tubercular burden of IS was also confirmed in our study and the time taken to presentation was markedly longer compared to the western data. Therefore, understanding the clinical spectrum of this disease helps overcome hurdles of recurrence and debilitating neurological morbidity.

Infectious spondylodiscitis and kyphosis correction in an infant: a case report

Background Neonatal infectious spondylodiscitis is a rare bony infection with atypical clinical presentation and non-specific systemic symptoms. Diagnosis and treatment are often delayed resulting in vertebral destruction and severe complications. We retrospectively reviewed the case of an infant with infectious spondylodiscitis resulting in T12 body destruction and marked angular kyphosis. Case-report A 4-week-old infant developed an infectious spondylodiscitis resulting in destruction of the T12 vertebral body and involvement of disc between T12 and L1. At 6 months of age, X-ray showed a marked thoracolumbar angular kyphosis above 50 Cobb degrees. Therefore, the patient underwent single time surgery with double anterior and posterior approach. At 9 years follow up, clinical and radiological findings show a stable correction with good aesthetic appearance. Conclusion Neonatal spondylodiscitis could lead to marked kyphosis similar to the congenital one. Since treatment with casts and tutors is often inefficacious, prompt surgery should be considered. The double anterior and posterior approach is the best option in this condition.

POS1277 NON-CONTIGUOUS MULTIFOCAL SPONDYLODISCITIS: A CASE SERIES AND REVIEW OF LITERATURE

Background:Spondylodiscitis is an infective process of the disc and the two adjacent vertebrae. It is quite a rare disease accounting for 2–7% of all cases of septic osteomyelitis. These spinal infections touch commonly a single level, the lumbar spine being the most affected. Non-contiguous spine level involvement is seldom reported in the literature. This last group is for the most part imputable to granulomatous organisms [1,2].Objectives:Study the clinical, microbiological, radiological, therapeutic and evolutional characteristics of non-contiguous multi-levels spondylodiscitis.Methods:We conducted a retrospective descriptive study over twenty-one years in the Department of Rheumatology. The diagnosis of spondylodiscitis was based on combination of clinical, biological and radiological arguments.Results:Eight patients had non-contiguous multi-levels infectious spondylodiscitis. There were 6 men and 2 women. The mean age was 53.3±26.2 years. The mean delay from onset of symptoms to diagnosis was 134.6±77.6 days. Back pain was the most common symptom. All patients had spinal syndrome. The Signs of spinal cord compression were observed in 3 patients. C-reactive protein levels were elevated in 6 patients (mean: 56 ± 30.8 mg/L). Plain radiography, performed in all cases, showed pathological pictures in 7 patients. Magnetic resonance imaging was performed in 6 patients. Vertebral levels affected were thoracic / lumbar in 6 cases, cervical/thoracic in 1 case and cervical/lumbar in 1 case. The paravertebral abscess was associated to the disc involvement in 3 cases. Epiduritis was associated in 3 cases. Pathogens were isolated in all cases. Tuberculosis was the most common cause. The leading causative agents in non-tuberculosis spondylodiscitis were staphylococcus aureus, brucella and streptococcus B. Two microorganisms combined were found in two cases (mycobacterium tuberculosis associated to Escherichia coli in one case and mycobacterium tuberculosis associated to Brucella in another). Medical treatment was adapted to the microbial culture and the sensitivity profile of the etiological agent. After therapy, 7 patients had regression of symptoms and 1 patient had a permanent neurological impairment.Conclusion:Multilevel spondylodiscitis involving non-contiguous spine segments is rare. Although atypical organisms are generally held to be responsible, the common bacteria such as Streptococcus B or Staphylococcus aureus should not be overlooked.References:[1]Zimmerli W. Clinical practice.Vertebral osteomyelitis. N Engl J Med 2010 Mar;362(11):1022–9.[2]Cottle L, Riordan T. Infectious spondylodiscitis. J Infect 2008; 56(June (6)):401–12.Disclosure of Interests:None declared

Differentiation between infectious spondylodiscitis versus inflammatory or degenerative spinal changes: How can magnetic resonance imaging help the clinician?

Spondylodiscitis is a complex disease whose diagnosis and management are still challenging. The differentiation between infectious and non-infectious aetiology is mandatory to avoid delays in the treatment of life-threatening infectious conditions. Imaging methods, in particular magnetic resonance imaging (MRI), play a key role in differential diagnosis. MRI provides detailed anatomical information, especially regarding the epidural space and spinal cord, and may allow differential diagnosis by assessing the characteristics of certain infectious and inflammatory/degenerative lesions. In this article, we provide an overview of the radiological characteristics and differentiating features of non-infectious inflammatory spinal disorders and infectious spondylodiscitis, focussing on MRI results and presenting relevant clinical and pathological features that help early diagnosis.