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PubMed2004

The etiologic diagnosis of infectious discitis is improved by amplification-based DNA analysis.

OBJECTIVE: Blood cultures and cultures of disc material are required to identify and treat bacterial agents responsible for septic spondylodiscitis, but these methods have limited sensitivities. We undertook this study to compare nonculture amplification-based DNA analysis with conventional culture of disc aspirate. METHODS: Nineteen patients with spondylodiscitis, including 11 with a history of spinal surgery, presented with negative blood cultures and underwent percutaneous disc or epidural abscess puncture for bacterial diagnosis. Amplification by polymerase chain reaction was performed on 16S ribosomal DNA universal target genes and femA staphylococci-specific target genes in all patients, and on the upstream p34 mycobacterial gene in 1 patient. Species identification relied on amplicon sequencing and comparison with templates from GenBank. Amplification of the femA gene led to subsequent testing for methicillin resistance by amplification of the mecA gene. Further assessment using a staphylococci- and methicillin resistance-specific DNA array was performed on 3 samples. RESULTS: Microbiologic and molecular assays identified the causative organism in 14 of 19 patients (74%) and 19 of 19 patients (100%), respectively. In culture-positive patients, DNA-based and microbiologic results were highly correlated. Five agents (Staphylococcus simulans, Staphylococcus sciuri, Brucella species, Actinomyces israelii, and Mycobacterium tuberculosis complex) were identified only by DNA-based methods. In 1 sample, Corynebacterium jeikeium and coagulase-negative Staphylococcus were both cultured, whereas DNA analysis identified only Staphylococcus hominis. CONCLUSION: DNA-based methods are highly sensitive and specific. They can usefully complement standard microbiologic methods for identifying the cause of infectious spondylodiscitis and contribute to species-specific therapeutic orientation in patients with negative blood and disc aspirate cultures.

Adult↗

PubMed1994

Hypersegmentation of neutrophils in the cerebrospinal fluid: report of a case with hematologic correlation and review of the literature.

Hypersegmented neutrophils can occasionally be seen in the cerebrospinal fluid (CSF) of patients with acute pyogenic meningitis, and rarely as an artifact of cytocentrifugation. We report a case of florid neutrophil hypersegmentation in cytocentrifuged CSF specimens from a patient presenting with anemia and mental status changes. Megaloblastic anemia was excluded by a thorough hematologic evaluation, and the patient was later found to have an epidural abscess. The striking hypersegmentation is attributed to the combined effects of meningeal infection and cytocentrifugation, and a review of the available limited literature on cytomorphologic alterations in CSF cells, specifically neutrophils, is presented.

Cell Nucleus↗

PubMed2001

Toxicity of photodynamic therapy after combined external beam radiotherapy and intraluminal brachytherapy for carcinoma of the upper aerodigestive tract.

BACKGROUND AND OBJECTIVE: To describe the toxicity of photodynamic therapy (PDT) in patients with carcinoma of the upper aerodigestive tract who received prior treatment with external beam irradiation and intraluminal brachytherapy (IB). STUDY DESIGN/MATERIALS AND METHODS: Hospital records of PDT patients were reviewed. Three patients who received prior treatment with external beam irradiation and IB were identified. Two patients had esophageal carcinoma treated with combined chemotherapy and external beam irradiation (55.8 and 50.4 Gy) followed by IB (12 Gy and 35 Gy at 1 cm). These patients then received PDT for treatment of recurrence (2 mg/kg Photofrin injection and 2 light applications: 630 nm, 150--200 J/cm, 200--400 mW/cm). One patient had non-small cell lung cancer treated with external beam irradiation (60 Gy) followed by IB (36.1 Gy at 1 cm) and then received PDT for recurrence (1 mg/kg Photofrin injection and one light application: 630 nm, 150 J/cm, 200 mW/cm). RESULTS: One patient with esophagus cancer had formation of a tracheoesophageal fistula, which required stent placement. The other esophageal cancer patient developed quadriplegia due to an epidural abscess arising from a fistula with the diseased portion of the esophagus. The lung cancer patient had massive hemoptysis after the procedure and died 2 days later. Autopsy showed necrotizing arteritis of the right pulmonary artery. CONCLUSION: Patients with upper aerodigestive tract carcinoma who have received treatment with both external beam irradiation and IB seem to be at higher risk for complications when treated with PDT.

Aged↗

PubMed1991

Pulmonary Aspergillus chest wall involvement in chronic granulomatous disease: CT and MRI findings.

Pulmonary Aspergillus infection in patients with chronic granulomatous disease tends to involve the chest wall and consequently carries a high mortality rate. We report the findings of computed tomography (CT) and magnetic resonance imaging (MRI) in three such cases. One patient underwent both CT and MRI, one, CT only, and one, MRI only. In all three, both CT and MRI demonstrated pulmonary consolidations with direct extension to the adjacent chest wall. In both patients who were examined by CT, scans revealed permeative osteolytic changes of adjacent rib or spine compatible with osteomyelitis. In both patients who were examined by MRI, adjacent chest wall involvement was depicted on T1-weighted images and showed increased signal intensity on T2-weighted images. In one of these patients, the chest wall lesion was well defined on T2-weighted images, an appearance compatible with abscess. Epidural extension was demonstrated on MRI in the other patient, who later developed paraparesis. We suggest that CT and MRI have a complementary role in evaluating chest wall invasion by pulmonary Aspergillus infection in chronic granulomatous disease.

Adolescent↗

PubMed1996

Cauda equina syndrome secondary to lumbar spondylodiscitis caused by Streptococcus milleri.

A 79-year-old Afro-Caribbean woman presented with a 5-month history of low back pain and a 2-month history of weakness of the lower limbs associated with cauda equina syndrome. A plain X-ray of the lumbar spine showed a collapse of the L4 body consistent with osteomyelitis. An MRI scan of the lumbar spine showed narrowing of the L3/4 disc space, destruction of the adjacent vertebral bodies and an epidural abscess. She was admitted to hospital and treated with a high dose of i.v. antibiotics followed by radical surgical excision of the lesion through a combined anterior and posterior approach with instrumentation. Tissue culture grew Streptococcus milleri. One week after surgery the patient developed septicaemia. A blood culture grew Pseudomonas aeruginosa, which was successfully treated with antibiotics. She eventually recovered bowel and bladder control and regained muscle power in the lower limbs. Streptococcus milleri is a rare causative organism in osteomyelitis, this being only the eighth reported case in the literature. Aggressive surgical treatment combined with a prolonged antibiotic regime is recommended to achieve a satisfactory result.

Abscess↗

PubMed1990

Cranioplasty with a frozen and autoclaved bone flap.

27 cases of cranioplasty with autogenous bone grafts stored in a deep-freezer and autoclaved before use are reported. The results of follow-up for an average period of one year were satisfactory from the standpoint of brain protection and cosmetic reconstruction. A small area of absorption of grafted bone was observed in two cases on the follow-up skull roentgenograms. No serious complications were seen except in one case, whose bone flap had to be removed due to an epidural abscess. Experiments revealed that deep-freezing and autoclaving had only minimal effects on bone structure, although osteocytes degenerated. Autogenous bone flap after deep-freezing is a useful material for cranioplasty but sterilization before use is indispensable. Autoclaving is a simple method for sterilization of the flap, available in any operating theatre. It does not increase the risk of postoperative complications such as infection or absorption.

Adult↗

PubMed1989

Complications of anterior cervical discectomy without fusion in 450 consecutive patients.

The complications of anterior discectomy without fusion were analyzed on the basis of 450 consecutive cases treated surgically for degenerative disc disease. There was no death related to the procedure. The most common complication was a worsening of the pre-existing myelopathy. This occurred in 3.3%, including one case with severe medullary contusion. Wound infection developed in 1.6%. Additional radicular symptoms and wound haematoma, respectively, occurred in 1.3%; recurrent nerve palsy, Horner's syndrome, and respiratory insufficiency, respectively, in 1.1% of the cases. Epidural haematoma and instability of the cervical spine, respectively, occurred in 0.9%, nerve root lesion and aseptic spondylodiscitis, respectively, in 0.4%. There was one case each (0.2%) with a pharyngeal lesion, meningitis due to dural perforation, transient additional myelopathy, and epidural abscess. The results and the management of complications are discussed in relation to numerous previously published reports, including posterior procedures and anterior fusion techniques. Precise knowledge of all potential accidents and pitfalls related to the surgical procedure and of their aetiology may contribute to preventing failures. The rate of complications in this series has been reduced in the past years by better patient selection, by paying more attention to correct positioning of the patient during the operation, and by meticulous removal of all offending structures. Discectomy without interbody fusion is now considered to be a reasonably safe procedure with an acceptable operative morbidity and lack of mortality.

Adult↗

PubMed1997

[Spinal and regional anesthesia in bacteremia].

Bacteraemia and septicaemia are generally thought to be relative or absolute contraindications for central neural axis (CNA) blocks. Postulated mechanisms for haematogenous infection of the central nervous system (CNS) caused by subarachnoid or epidural puncture might be an accidental vessel puncture, a change of pressure in the subarachnoid space, and the induction of a "locus minoris resistentiae." Infectious complications of diagnostic lumbar puncture, spinal or epidural anaesthesia are very rare. Although in animals meningitis can be induced by subarachnoid puncture during bactaeremia, there is no study that proves an increased risk for bacteraemic patients. Transient bacteraemia is common, especially in urological and obstetrical-gynecological procedures that are often done in regional anaesthesia, but the incidence of infectious complications is low. This review investigates the few published cases in which a haematogenous infection of the CNS may have been caused by regional anaesthesia. Based on current knowledge, bacteraemia cannot be an absolute, but only a relative contraindication for CNA blocks. Antibiotic chemoprophylaxis should be given before the puncture and the patients must be closely followed after the anaesthesia, particularly for the development of spinal epidural abscess. Because of the possibly increased risk of infectious complications, informed consent should be obtained from the patient.

Anesthesia, Conduction↗

PubMed2003

Brucellar spondylitis.

We carried out a prospective analysis of 86 patients with brucellosis, and 26 (30%) cases were diagnosed as brucellar spondylitis. Two patients had cervical involvement, two thoracic, and 21 lumbosacral as seen in MRI. Four patients had epidural abscess and two had paravertebral abscess. All patients received combined antibiotic therapy for 4 to 12 months. Those with cervical involvement underwent surgical treatment because of medullar compression. Neither death nor severe sequelae were observed.

Adolescent↗

PubMed2004

Vertebral infection.

Vertebral infection represents 2-4% of all cases of osteomyelitis. An increase in the incidence of pyogenic as well as granulomatous spondylitis has been noticed. Early radiological diagnosis is of great importance for prompt treatment and prevention of clinically significant consequences which include neural compromise and late spinal deformities. The most frequent causative pyogenic micro-organisms are gram-negative bacteria especially Staphylococcus aureus. An important form of nonpyogenic granulomatous infection is tuberculous spondylitis which represents the most common form of extrapulmonary tuberculosis. The routes of spinal infection include hematogenous spread, postoperative infections, direct implantation during spinal punctures and spread from a contiguous focus. The role of imaging is an early diagnosis, evaluation of extent of infection with special regard to potential neural compromise, differential diagnosis, guidance of diagnostic biopsy, planning of eventual operative procedures and assessment of therapeutic response. Imaging modalities include bone scintigraphy, radiography, CT and MRI. In practice, usually a combination of a sensitive and a specific method is utilised. The only imaging modality which combines high sensitivity with satisfactory specificity is MRI. This is the reason that MRI frequently has become the first imaging modality in clinically suspect spinal infection. The MRI is the method of choice for direct demonstration of extension of infection, especially of eventual epidural abscess or phlegmon and consecutive neural compression. Using MRI monitoring of therapeutic efficiency is possible.

Biopsy↗

PubMed2000

[Possibilities and limits of conservative therapy of spondylitis and spondylodiscitis].

BACKGROUND AND AIM OF THE STUDY: For many years the treatment of spondylitis and spondylodiscitis has been discussed controversially. The aim of this study is to report on objective and subjective mid-term results of therapy of spondylitis and to present a differentiated concept of treatment. METHODS: Between 1988 and 1996, 58 patients were treated with spondylitis or spondylodiscitis. Nine of these patients had to be operated. A biopsy was taken in all of the cases. According to the antibiogram obtained by the biopsy, antibiotics were applied intravenously. The patients were immobilized by a plaster bed for at least 6 weeks and were then treated by a spinal orthosis for another 3 months. Patients were re-examined clinically and radiographically and by a questionnaire (including Roland-Morris score), after 8 years on average. RESULTS: Patients were diagnosed correctly 4 months after the begin of the disease. Spondylitis was predominantly localized in the lumbar spine. A positive bacteriological culture was derived from one third of the biopsies; none of them was a specific culture. C-reactive protein was revealed as appropriate for diagnosis and follow-up of spondylitis. In 84% of the patients a total or partial bony fusion was demonstrated radiographically. Questionnaire assessment revealed a significant decrease of the Roland-Morris score (17.8-7.4) and a significant relief of pain (8.9-2.5). CONCLUSIONS: We recommend surgical treatment on patients with major vertebral body destruction, epidural abscess and progressive neurological impairment. These indications for operation can be prevented by a rapid diagnosis, so that spondylitis can be successfully treated by consequent immobilization in a plaster bed and appropriate antibiotics.

Adolescent↗

PubMed2003

Removal of esophageal expandable metal stents: description of technique and review of potential applications.

BACKGROUND: Expandable metallic stents (EMS) have seen wide application in patients with malignant stricture and fistulas. They have not seen wide application for benign disease because of concern over acute complications and long-term sequelae. METHODS: Between June 1999 and October 2000, six patients with EMS in place for malignant stricture (n = 3), benign stricture (n = 1), anastomotic leak (n = 1) and benign esophagorespiratory fistula (n = 1) had their stents endoscopically removed. Removal was performed secondarily to the following complications: secondary stricture (n = 1), epidural abscess (n = 1), diskitis (n = 1), resolution of fistula (n = 2), and resolution of anastomotic leak (n = 1). RESULTS: Four patients had one EMS: Ultraflex (n = 3) and Z-stent (n = 1). In two patients, two stents (Ultraflex and Z-stent) were retrieved simultaneously. No procedurally related complications occurred. Two patients with esophageal cancer required additional stents. All three patients with benign fistula and stricture recovered uneventfully. CONCLUSIONS: The safe removal of current brands of EMS may facilitate the wider application of these devices to include selective patients with benign disease.

Adult↗

PubMed2006

Surgical treatment of spondylodiscitis in the cervical spine: a minimum 2-year follow-up.

Cervical spine spondylodiscitis is a rare, but serious manifestation of spinal infection. We present a retrospective study of 20 consecutive patients between 01/1994 and 12/1999 treated because of cervical spondylodiscitis. Mean age at the time of treatment was 59.7 (range 34-81) years, nine of them female. In all cases, diagnosis had been established with a delay. All patients in this series underwent surgery such as radical debridement, decompression if necessary, autologous bone grafting and instrumentation. Surgery was indicated if a neurological deficit, symptoms of sepsis, epidural abscess formation with consecutive stenosis, instability or severe deformity were present. Postoperative antibiotic therapy was carried out for 8-12 weeks. Follow-up examinations were performed a mean of 37 (range 24-63) months after surgery. Healing of the inflammation was confirmed in all cases by laboratory, clinical and radiological parameters. Spondylodesis was controlled radiologically and could be achieved in all cases. One case showed a 15 degrees kyphotic angle in the proximal adjacent segment. Spontaneous bony bridging of the proximal adjacent segment was observed in one patient. In the other cases the adjacent segments radiologically showed neither fusion nor infection related changes. Preoperative neurological deficits improved in all cases. Residual neurological deficits persisted in three of eight cases. The results indicate that spondylodiscitis in cervical spine should be treated early and aggressive to avoid local and systemic complications.

Adult↗

PubMed2006

Surgical treatment of pyogenic vertebral osteomyelitis with spinal instrumentation.

Pyogenic vertebral osteomyelitis responds well to conservative treatment at early stage, but more complicated and advanced conditions, including mechanical spinal instability, epidural abscess formation, neurologic deficits, and refractoriness to antibiotic therapy, usually require surgical intervention. The subject of using metallic implants in the setting of infection remains controversial, although more and more surgeons acknowledge that instrumentation can help the body to combat the infection rather than to interfere with it. The combination of radical debridement and instrumentation has lots of merits such as, restoration and maintenance of the sagittal alignment of the spine, stabilization of the spinal column and reduction of bed rest period. This issue must be viewed in the context of the overall and detailed health conditions of the subjecting patient. We think the culprit for the recurrence of infection is not the implants itself, but is the compromised general health condition of the patients. In this review, we focus on surgical treatment of pyogenic vertebral osteomyelitis with special attention to the role of spinal instrumentation in the presence of pyogenic infection.

Anti-Bacterial Agents↗

PubMed2006

Therapeutic use of cephazolin to prevent complications of spine surgery.

Discitis, caused by pyogenic organisms, is a potential complication of any procedure which involves entering the intervertebral disc during open or percutaneous procedures. While there are wide variations in the severity of symptoms, the characteristic feature of discitis is the development of increasingly severe back pain, which is not relieved by rest, or narcotic analgesics. While there is a tendency to spontaneous resolution over time, a self-limiting course does not always eventuate. Serious complications resulting from spread of the infective process can lead to vertebral osteomyelitis or to the formation of an epidural abscess with further risk of neural compression. Clinical and experimental evidence now supports the prophylactic use of a suitable antibiotic, but some uncertainties exist about the benefits of antibiotic therapy in treating established discitis. While cephazolin is a widely favoured choice of antibiotic, the timing of its administration to prevent or treat discitis has been complicated by the lack of suitable methods for detecting and measuring the concentration of cephazolin in the plasma and disc in experimental and clinical conditions. This paper describes a high-performance liquid chromatography technique for detecting the antibiotic cephazolin. The results conclude cephazolin can be detected in the plasma and disc after administering an intravenous bolus dose. However, concentration of cephazolin in the outer disc was 12 times greater than that of the inner disc.

Animals↗

PubMed1994

HIV status does not affect microbiologic spectrum or neurologic outcome in spinal infections.

The impact of human immunodeficiency virus (HIV) on the clinical presentations, causative organisms, and neurologic outcomes of patients with spinal infections is reviewed. Thirty-two patients with spinal epidural abscesses, vertebral osteomyelitis, or both were treated at an urban hospital over a 42-month period. Thirteen of these patients were confirmed by serologic analysis to be HIV seropositive. The diagnoses were confirmed by 30 open surgical procedures (14 anterior, 16 posterior) and seven percutaneous biopsies. Twenty-seven intraoperative cultures were positive and the remaining three patients had positive blood cultures prior to the surgical procedure. In both the HIV (+) and HIV (-) groups, Staphylococcus aureus predominated as the causative organism (overall rate: 72%). Mycobacterium tuberculosis was the second most common organism. The clinical presentations in both groups were similar with pain as the most frequent symptom and objective neurologic abnormalities on physical examination in 29 of the 32 patients (91%). The results of this analysis show that the clinical presentations and organisms cultured do not differ depending upon a concurrent HIV infection. Furthermore, the ultimate neurologic outcome of patients with spinal infections depends on their neurologic status at the time of treatment and not on their HIV status.

Adult↗

PubMed2006

CT perfusion imaging in the syndrome of the sinking skin flap before and after cranioplasty.

The syndrome of the sinking skin flap (SSSF) has been described as one of the causes of neurological deficits after decompressive craniectomy We report a case of a 57-year-old woman with SSSF. Two years earlier, this patient, with no neurological deficits, underwent removal of the bone flap during treatment of an epidural abscess due to wound infection after a clipping operation for a ruptured aneurysm. The patient, who subsequently developed a sinking skin flap, gradually presented with gait disturbance and poor activity around 1 year before she came to our facility. On admission, neurological examination showed left hemiparesis and mild confusion. Cranioplasty with titanium mesh plate was performed. The cerebral blood flow (CBF) value in CT perfusion imaging in the symptomatic hemisphere increased from 23 to 31 cm3/100 g/min, and the value in the contralateral side increased from 37 to 41 cm3/100 g/min after cranioplasty. CT perfusion imaging after cranioplasty revealed the improvement of cerebral blood flow not only on the symptomatic side but also on the contralateral side. The patient recovered well and was discharged without hemiparesis and confusion 2 weeks after cranioplasty. As far as we know, this is the first reported case of SSSF examined with CT perfusion imaging before and after cranioplasty.

Cerebrovascular Circulation↗

PubMed2005

Acute mastoiditis and osteomyelitis of the temporal bone.

OBJECTIVE: Acute mastoiditis becomes clinically significant when infection spreads through the periosteum and induces periosteitis. This study describes an atypical complication of acute mastoiditis: osteomyelitis of the temporal bone. PATIENTS AND METHODS: The study sample included all patients admitted for acute mastoiditis between September 2001 and December 2003 who had symptoms, signs and imaging findings of osteomyelitis of the temporal bone beyond the mastoid area. The files were reviewed for diagnosis, work-up, radiographic findings and treatment. RESULTS: The study group included 6 of the 120 patients treated for acute mastoiditis. In four children (66%), the diagnoses of acute otitis media and acute mastoiditis were made simultaneously at admission. Ear cultures yielded coagulase-positive Staphylococcus in three patients, Bacteroides in two, multiple organisms in two, S. pneumoniae in one, and no growth in two. Complications were suspected if there was a lack of improvement in symptoms and signs, or in cases of skin involvement over the temporal bone beyond the area of the mastoid in accordance with imaging findings. Computerized tomography demonstrated temporal bone absorption beyond the mastoid area (squama and/or petrous bones) in all children, suspected sinus vein thrombosis in two, and suspected epidural abscess in one. All children were treated with at least cortical mastoidectomy and insertion of ventilation tubes. Revision mastoidectomy was performed in three children in whom no improvement was noted and imaging suggested other complications. CONCLUSION: The present study describes an unusual complication of acute mastoiditis-osteomyelitis of the temporal bone beyond the mastoid framework. The disorder is characterized by a failure to respond both locally and systemically to accepted medical and surgical therapy, persistent fever and high levels of inflammatory markers, and computerized tomography findings of temporal bone destruction. Treatment includes broad-spectrum antibiotics and at least cortical mastoidectomy. Prognosis is good.

Acute Disease↗