Primary solitary Echinococcosis in cervical spine. Postsurgical successful outcome after long-term albendazole treatment

Parasitic infections of the spine: case series and review of the literature

OBJECTIVEAlthough parasitic infections are endemic to parts of the developing world and are more common in areas with developing economies and poor sanitary conditions, rare cases may occur in developed regions of the world.METHODSArticles eligible for the authors' literature review were initially searched using PubMed with the phrases "parasitic infections" and "spine." After the authors developed a list of parasites associated with spinal cord infections from the initial search, they expanded it to include individual diagnoses, using search terms including "neurocysticercosis," "schistosomiasis," "echinococcosis," and "toxoplasmosis."RESULTSTwo recent cases of parasitic spinal infections from the authors' institution are included.CONCLUSIONSKey findings on imaging modalities, laboratory studies suggestive of parasitic infection, and most importantly a thorough patient history are required to correctly diagnose parasitic spinal infections.

VERTEBRAL HYDATIDOSIS: BIBLIOGRAPHICAL REVIEW AND CLINICAL CASE REPORT

ABSTRACT We will present a literature review of the vertebral location of hydatidosis. It is a rare, locally aggressive condition with a high recurrence rate that requires clinical treatment (antihelminthic drugs) and surgery, with decompression of the spinal canal. We report a case with more than 11 years of follow-up, which required surgical treatment on 4 occasions. Level of Evidence V; Therapeutic-investigational study of treatment results.

A rare and unexpected clinical progress and location on a primary extradural spinal hydatid cyst in a pediatric patient: a case report

BACKGROUND

Involvement of spine in patients with hydatid disease (HD) is less than 1% and primary intra-spinal extradural HD is extremely rare. Although this disease is introduced as benign pathology according to its clinical presentation and biological behavior, intraoperative rupture of the cyst may aggravate the patients' outcome in the long-term especially in pediatric patient population.

CASE PRESENTATION

We report a 9-year-old girl who presented a progressive neurological deterioration due to an enlargement of a ventrally located extradural hydatid cyst within the thoracic spinal canal. Total removal of the cyst was achieved by preserving the capsule integrity for preventing potential seeding. Our preoperative initial diagnosis based on the radiological findings was confirmed as cyst hydatid histopathologically.

CONCLUSION

Cyst hydatid should be considered in the differential diagnosis of the presence of homogenous cystic lesions with regular shape inside the spinal canal especially in patients from endemic region. To our knowledge, this pediatric patient is the first case of cyst hydatid located ventral side of the spinal cord extradurally located inside the spinal canal showing no extension.

Tibial hydatidosis: a case report

Background

Hydatidosis is a tapeworm infection caused by the larval stage of Echinococcus species. The organs most frequently affected are the liver and the lungs. Primary involvement of the skeleton is rare. The location of hydatid cysts in the tibia is seldom described in the medical literature, and its diagnosis is challenging and often presenting with a pathologic fracture simulating benign bone cystic lesion.

Case presentation

We report a 53-year-old Tigrian woman who developed hydatid disease of the tibia.

Conclusion

The diagnosis of primary bone hydatid disease, especially tibial hydatidosis, is difficult and requires high index of suspicion. Hence, orthopedic surgeons should be aware of this disease. Moreover, it should be considered in preoperative differential diagnosis of destructive bone lesions especially in endemic areas.

A rare case of recurrent primary spinal echinococcosis

Spinal hydatid disease, though rare, is one of the differential diagnosis of spinal cord compression syndrome especially in endemic areas. Surgery is the treatment of choice but surgery alone is not curative. Adjuvant drug therapy as well as intraoperative prophylaxis are indicated. Despite all measures, the disease has high recurrence rates and overall outcome is still poor. We report a case of 65 year old male with lumbosacral hydatidosis recurring after 13 years.

Spinal manifestation of hydatid disease: a case series of 36 patients

OBJECTIVE

Vertebral hydatid cysts are found in <1% of all cases of hydatidosis. The pathology has an infiltrative malignant nature, affecting the vertebral body with possible extension in the epidural space. This pathomechnism is associated with a high rate of morbidity, mortality, and relapse. Decompressive surgery combined with antihelminthic therapy is recommended to eradicate the disease and prevent recurrence.

METHODS

Between 1990 and 2007, 36 patients with a mean age of 31 years were diagnosed as having spinal hydatid disease and underwent surgery on several occasions for multiple recurrences. Combined chemotherapy with albendazole also was given.

RESULTS

Initial surgery and chemotherapy steadied clinical progression and functional deterioration, but with a recurrence rate of 89% and an average time to disease recurrence of 2.5 years, did not improve the known malignant course of disease in comparison to the literature.

CONCLUSION

The devastating and malignant course of this disease, which affects mostly young patients, demands continuous development of preventive care in endemic regions, the early detection and screening of the diseased patients, and eventually the advancement of the combined medical and surgical treatment.

Recurrent Echinococcal Infection of the Lumbar Spine: An 11 Year Follow-up

Spinal hydatid cyst is a rare occurrence in non endemic countries. We present a case of recurrent lumbar hydatid disease in a 21-year-old male who following initial treatment had a good functional outcome and healing for 8 years, following which he came back with complaints of low back ache and neurological deficit. Patient underwent a second surgery with global debridement of L3-L5 vertebrae followed by medical management for two years. He had a good surgical outcome with recovery from the neurological deficit. Patient has returned to his routine activities and is being reviewed every year; there is no evidence of recurrence in the past 3 years. To the best of our knowledge recurrence after 8 years of initial treatment, followed by good clinical and radiological outcome for 3 years after surgery and treatment of the recurrence has not been reported in literature.

Intradural extramedullary primary hydatid cyst of the spine: a case report and review of literature

Primary intradural extramedullary hydatid cyst is a rare form of parasitic infection, causing focal neurological signs, commonly observed in sheep-raising areas of the world. We report a rare case of intradural, extramedullary spinal cyst, which we had misdiagnosis in the first surgery, because of rarity of the case. A 55-year-old man presented to our hospital in August 2008. He was admitted to our clinic because of lumbar pain of increasing severity and progressive difficulty with walking and stiffness of both lower limbs, which had lasted for 1 month. On the basis of imaging results, arachnoid cyst of the lumbar spine was diagnosed. Due to rapid progression of the patient's symptoms toward spastic paraplegia, he underwent an emergency surgical decompression procedure. The patient underwent exploratory surgery using a posterior approach. A L1-L2 laminectomy was performed. After opening the dura, an intradural extramedullary cystic mass was determined. The surgical specimen measured 6 × 2 cm and was described as a whitish, pearl-like, semitranslucent, cystic material, which was thought to be parasitic. Surgery has to be followed by albendazole therapy.

Primary solitary hydatid cyst in paraspinal cervical muscles: a case report and review of the literature

Hydatid disease caused by Echinococcus granulosus and Echinococcus multilocularis commonly presents with pulmonary and hepatic cysts. Primary paraspinal muscle cysts are a rare presentation. We report a case of hydatid cyst within paraspinal muscles presenting with cervical mass and associated pain. The hydatid disease serological test was negative. Neither hepatic nor pulmonary cystic lesions were found. Radiographic findings were unspecific for hydatid cysts. Surgical resection was planned due to the provisional diagnosis of muscular cystic neoplasm. During surgery, a cyst containing a clear liquid was found. The cyst wall was excised and the surgical field was irrigated with hypertonic saline. The patient's symptoms resolved by discharge day. Postoperative pathological examinations revealed a muscular hydatid cyst.

Severe kyphoscoliosis after primary Echinococcus granulosus infection of the spine

A primary Echinococcus granulosus infection of the spine involving the vertebrae T8 and T9 of a 6-year-old child was treated elsewhere by thoracotomy, partial corporectomy, multiple laminectomies and uninstrumented fusion. Owing to inappropriate stabilization, severe deformity developed secondary to these surgeries. X-rays, CT and MRI scans of the spine revealed a severe thoracic kyphoscoliosis of more than 100 degrees (Fig. 1) and recurrence of Echinococcus granulosus infection. The intraspinal cyst formation was located between the stretched dural sac and the vertebral bodies of the kyphotic apex causing significant compression of the cord (Figs. 2, 3, 4). A progressive neurologic deficit was reported by the patient. At the time of referral, the patient was wheelchair bound and unable to walk by herself (Frankel Grade C). Standard antiinfectious therapy of Echinococcus granulosus requires a minimum treatment period of 3 months. This should be done before any surgical intervention because in case of a rupture of an active cyst, the delivered lipoprotein antigens of the parasite may cause a potentially lethal anaphylactic shock. Owing to the critical neurological status, we decided to perform surgery without full length preoperative antiinfectious therapy. Surgical treatment consisted in posterior vertebral column resection technique with an extensive bilateral costotransversectomy over three levels, re-decompression with cyst excision around the apex and multilevel corporectomy of the apex of the deformity. Stabilisation and correction of the spinal deformity were done by insertion of a vertebral body replacement cage anteriorly and posterior shortening by compression and by a multisegmental pedicle screw construct. After the surgery, antihelminthic therapy was continued. The patients neurological deficits resolved quickly: 4 weeks after surgery, the patient had Frankel Grade D and was ambulatory without any assistance. After an 18-month follow-up, the patient is free of recurrence of infection and free of neurologically deficits (Frankel E). This case demonstrates that inappropriate treatment--partial resection of the cyst, inappropriate anterior stabilization and posterior multilevel laminectomies without posterior stabilization--may lead to severe progressive kyphoscoliotic deformity and recurrence of infection, both leading to significant neurological injury presenting as a very difficult to treat pathology. Fig. 1 X-rays of the patient showing a kyhoscoliotic deformity. a ap view, b lateral view Fig. 2 CT reconstruction of the whole spine showing the apex of the deformity is located in the area of the previous surgeries Fig. 3 Sagittal CT-cut showing the bone bloc at the apex with a translation deformity Fig. 4 Sagittal T2-weighted MRI image showing the cystic formation at the apex.

Intradural extramedullary spinal hydatidosis: case report

The parasitic tapeworm Echinococcus granulosis causes hydatid disease, which is rarely encountered in nonendemic regions. It is a progressive disease with serious morbidity risks. Rarely, these cysts are found in the spine. They are mainly found epidurally, originating from direct extension from pulmonary, abdominal or pelvic infestation. Nevertheless, the main mechanism for intradural involvement is not yet clear. Antihelminthic treatment should be administered for a long period following early decompressive surgery. We report a case of recurrent hydatid disease that presented unusual intradural dissemination. Prognosis for spinal hydatid disease remains very poor and comparable to that of a malignant neoplasm.

Multiple intradural spinal hydatid disease: a case report and review of literature

STUDY DESIGN

A case report.

OBJECTIVE

We present an unusual case of pathologically confirmed multiple distinct spinal intradural extramedullar spinal hydatid cyst after 1 year of lung cyst hydatid operation.

SUMMARY OF BACKGROUND DATA

Hydatid disease is usually diagnosed in endemic regions. Spinal involvement of disease is very unusual and the literature about this entity is generally restricted to regional publications. Furthermore, intradural multiple involvement was not reported in literature.

METHODS

A 14-year-old boy admitted to our clinic with pain in the back, both of leg and disability in walking. The patient presented with back pain, asymmetrical paraparesis, right more than left and weakness. Multiple distinct spinal intradural extramedullary cystic lesion was identified with magnetic resonance imaging and was shown to be hydatid cyst by histopathologic confirmation after the surgical removal.

RESULTS

T5 and L4, L5, S1 laminectomies were performed at the same session, after these a lot of pearly white hydatid cysts located intradural extramedullary were removed totally with their capsule, and the cavity was irrigated with 20% hypertonic saline. Surgical treatment was uneventful. Second-month follow-up neurologic examination was normal and the hydatid cysts had totally disappeared in both regions in the second month of postoperative magnetic resonance imaging.

CONCLUSION

Spinal hydatid disease are uncommon. Among these, multiple distinct spinal intradural extramedullar location is extremely rare. Although total removal of the cysts without rupture should be the surgical goal in all cases, the best treatment remains an active nationwide prevention of the disease.

Disseminated intraspinal hydatid disease

Spinal echinococcosis is a rare entity, accounting for 1% of all cases of hydatid disease. The authors report the case of a 60-year-old man whom they treated for recurrent nerve root compression due to disseminated intraspinal echinococcosis (hydatid disease). Six years previously he had undergone surgery on an emergency basis at another institution after presenting with acute paraplegia due to a primary extradural hydatid cyst of the thoracic spine. Unfortunately, during surgical removal of the cysts, the echinococcosis disseminated into the spinal canal. This complication was documented by magnetic resonance (MR) imaging. In the 4 years before the authors treated him, he was hospitalized 4 times for 4 recurrences of nerve root compression. The authors treated the disseminated disease successfully with total T7-8 corpectomy, grafting with titanium cage and Texas Scottish Rite Hospital instrumentation, and long-term administration of albendazole (400 mg daily). Early diagnosis, proper utilization of MR imaging, and radical resection of diseased vertebrae and soft tissues followed by anthelmintic treatment are essential to control disseminated spinal hydatidosis and prevent recurrence.

Paraplegia due to recurrent multiple hydatid cyst of the spine: a case report

Recurrence after surgical treatment of hydatid cyst of the spine is extremely common. Preexisting fibrosis, fragility of the cyst wall, confluent cysts and proximity to vital structures makes radical excision difficult and repeated recurrences are inevitable. This case report describes a recurrent hydatid cyst presenting as three separate cysts in the dorsal spine in a middle-aged male. The extradural cyst caused paraplegia. The extraspinal cyst presented as an extrapleural mass in relation with the eighth, ninth and the tenth ribs near the costo-vertebral junction. The three cysts were resected en masse. Complete neurological recovery occurred with no recurrence at four years follow-up. Resection of the hydatid cyst en masse offers the best chance of cure and must be attempted in all cases. A prolonged chemotherapy should be administered in all cases.

Spinal hydatidosis accompanied by a secondary infection. Case report

Spinal hydatid disease is rarely encountered in nonendemic regions. It is a progressive disease that is associated with risks of serious morbidity. The authors report a case of an isolated primary hydatid cyst of the spine in a 34-year-old woman who presented with back pain, which had lasted for 3 months, as well as lower-extremity pain and fatigue, which had persisted for 2 months. A neurological examination yielded findings indicative of upper motor neuron involvement with complete sensory loss below the level of T-11. Magnetic resonance imaging of the spine showed multiple extradural cystic lesions with an abscess formation at T-11 and involvement of the paraspinal muscles. The patient underwent spinal decompression in which stabilization and total excision of the multiple epidural and psoas abscesses and paraspinal multiloculated cysts were performed. The diagnosis of hydatid disease associated with another infection was confirmed by histopathological evaluation. Albendazole was administered during the postoperative period. Previous reports of secondary infections accompanying this disease in extraspinal locations have been published. However, to the best of the authors' knowledge, there have been no publications about a secondary infection associated with hydatidosis in the spinal cord. One should bear in mind that spinal hydatidosis may be accompanied by other infections in endemic regions. Antihelminthic treatment should be administered for a long period following early decompressive surgery and adequate stabilization.

Diagnosis and treatment of multiple hydatid cysts at the craniovertebral junction. Case report

Echinococcosis, or hydatid disease, of the craniovertebral junction and skull base is rare. The authors report the occurrence of multiple hydatid cysts at this anatomical location in a young woman who was previously misdiagnosed with tuberculosis. The patient underwent transoral excision of the hydatid cysts followed by posterior decompression and occipitocervical fusion. She was treated postoperatively with albendazole for 12 weeks with a good outcome. The management of spinal hydatid disease is reviewed.

Unusual location of hydatid cyst: soft tissue mass in the neck

Hydatid disease is a parasitic infestation caused by the larval form of the cestode worm Echinococcus. The most commonly encountered form of the disease is visceral hydatid cyst caused by Echinococcus granulosus or dog tapeworm. We hereby represent an unusual case of hydatid disease located in the neck region in a 22-year-old female patient.

Hydatid cyst of the craniocervical junction: case report

OBJECTIVE AND IMPORTANCE

Although rare in developed countries, hydatid disease is a serious parasitic infection in endemic areas. Spinal disease most commonly involves the thoracic region, and involvement of the upper cervical spine is extremely rare. In this report, a case of hydatid disease involving the craniocervical junction is presented, along with a review of the literature.

CLINICAL PRESENTATION

A 44-year-old man presented with the complaint of neck pain. The results of his physical and neurological examinations were within normal ranges, except for pain exacerbated by neck motion and spasm of the cervical musculature. Magnetic resonance imaging demonstrated a cystic lesion involving the odontoid process and body of C1 and C2, with thin and regular cyst walls and cyst contents similar in intensity to that of cerebrospinal fluid. The results of serological tests performed with the suspected diagnosis of hydatid disease were positive.

INTERVENTION

The patient initially underwent surgery to provide stabilization of the craniocervical junction, using autogenous bone graft and sublaminar wiring from the occiput to C3 via a posterior approach. The cyst was approached via a transoral route, using a U-shaped pharyngeal incision. There were no neurological deficits after surgery. Postoperative magnetic resonance imaging scans confirmed complete excision of the cyst, and the patient was discharged on the 12th postoperative day. He received six cycles of albendazole treatment, each consisting of 28 days with an intervening drug-free period of 2 weeks. Magnetic resonance imaging scans performed 1 year after surgery revealed the patient was still disease-free.

CONCLUSION

Hydatid disease should be considered in the differential diagnosis of spinal cord compression, especially in endemic areas. Although the chance of obtaining a cure is unlikely, radical surgery coupled with antihelminthic therapy seems to provide long-lasting relief.

Spinal hydatid disease, a rare but existent pathological entity: case report and review of the literature

Spinal hydatid disease is a not uncommon cause of spinal cord compression in endemic countries; however, involvement of the epidural space with sparing of the vertebral column is rare. Early diagnosis and surgical decompression with total removal of the hydatid lesion, when possible, is generally considered the standard of care for this disease. The authors describe a case of massive epidural hydatid disease without involvement of the vertebral column in a 62-year-old male patient, treated with a 2-stage surgical operation and administration of systemic albendazole. The literature is reviewed regarding the clinical features, diagnosis, treatment and prognosis of spinal echinococcosis.

Spinal hydatidosis

STUDY DESIGN

Retrospective study.

OBJECTIVES

To revise the treatment of spinal hydatidosis.

SUMMARY OF BACKGROUND DATA

About 50% of cases of bone hydatidosis are spinal.

METHODS

Twenty patients with spinal hydatidosis were treated. There were 13 men and 7 women, with a mean age of 53.1 years. The median follow-up was 4.8 years. The infected area was the cervical spine in 1 patient, the dorsal spine in 7, the lumbar spine in 7, and the sacrum in 5. Curettage and resection of the infected bone were performed. The spine was exposed posteriorly in all but 2 patients. An additional posterior decompression and fusion with instrumentation were performed after removing the involved posterior elements in 8 patients. An anterior approach was used in 2 patients: a total corpectomy was performed and a bone graft was added. Two weeks later, a posterior decompression and fixation with instrumentation was done. No preoperative drugs were used. Medical antihelmintic treatment was used after surgery in all but 8 patients.

RESULTS

Thirteen patients had spinal cord injury at the moment of surgery. The neurologic damage recovered only in 1 case. Repeated curettage was necessary in 13 cases: in 12 of them because of recurrence and in 1 because of surgical wound infection. In 6 cases of recurrence, there was also chronic wound infection. At last follow-up, 17 patients were free of disease.

CONCLUSIONS

The treatment of choice of spinal hydatidosis is surgical removal of the affected vertebrae combined with posterior stabilization, followed by postoperative adjuvant chemotherapy. Recurrence is very frequent.

Recurrent spinal hydatidosis in North America

Spinal hydatidosis is an uncommon manifestation of the parasite Echinococcus, affecting fewer than 1% of patients with hydatid disease. The authors report on a 34-year-old Turkish woman who presented with recurrent primary spinal hydatid disease. The patient originally presented with progressive numbness and paraparesis that was reversed after T5–6 laminectomy and cyst removal. Pathological findings indicated parasitic infection and she underwent treatment for cysticercosis. Nevertheless, she returned 4 years later with back pain, numbness, and monoparesis. Neuroimaging studies revealed spinal cord compression with multiple cysts that were again resected. Pathological findings were consistent with Echinococcus.

Although this disease is uncommon, particularly in North America, the authors conclude that spinal hydatidosis should be considered in the differential diagnosis of any patient who has lived or traveled within endemic areas and who presents with spine lesions and cord compression. The authors review the literature pertaining to the epidemiological features, presentation, diagnosis, neuroimaging characteristics, recommended treatments, and overall prognosis of spinal hydatidosis.

Hydatid disease of bone. Review of 11 cases

Osseous hydatid disease is defined as development within bone of multiple cysts that are the larval form of the tapeworm Echinococcus granulosus. Bone cysts account for only 0.5-2.5% of all hydatid cysts in humans. We report on our experience.

METHODS

This retrospective study included patients managed between 1988 and 1998 for histologically documented hydatid disease of bone.

RESULTS

Eleven patients were included, six men and five women, with a mean age of 40.7 +/- 11.04 years (range, 27-60 years). Mean time to diagnosis was 22.7 +/- 18.2 months (range, 5-36). The pelvis was involved in six patients and a long bone in five (the femur in three, the tibia in one, and the fibula in one). Peripheral eosinophil counts were high in four patients and serological tests for hydatid disease were positive in five patients. Surgical treatment was used alone in 10 patients and with albendazole in one patient. The main complications were fistulization (n = 6) and suppuration (n = 4). Five patients experienced recurrences.

CONCLUSION

Hydatid disease still occurs in Morocco. The liver and lungs are the most common targets. Bone cysts are uncommon but severe. The behavior of osseous hydatid cysts resembles that of locally malignant lesions. Although immunofluorescent assays are useful, the final diagnosis depends on histology. The treatment rests on surgical excision. Recurrence is common, particularly at sites that are difficult to access.

Case report: clinical and serological evaluation of echinococcosis of the spine

A 53-year-old male with a severe destructive lesion of the L4 vertebral body caused by an Echinococcus granulosus hydatid cyst was studied. He underwent surgery twice, and was treated continuously with albendazole, followed by albendazole combined with praziquantel. Specific anti-echinococcal immunoglobulin (Ig) G, IgG4, and IgE activities before and after surgery were further determined. In spite of long-term chemotherapeutic treatment combined with surgery, no eradication of the disease was achieved.

Hydatid disease of the spine in South African children

We present three patients with neurologic complications of the spine from hydatid disease. The first was a 6-year-old girl with lower limb paralysis evolving over 2 weeks. Neuroimaging revealed a cystic mass compressing the spinal cord at the level of T8 and extending from the vertebral body. She underwent surgical decompression. Histopathologic examination confirmed hydatid disease. At 6-month follow-up, functional improvement had occurred with full ambulation. She continues on long-term albendazole therapy. Two other patients are described, one with primary spinal disease and the other with cerebral disease and secondary seeding to the spine. Spinal hydatid disease is a rarity, even more so in children. Although secondary disease, primarily affecting bone, carries a poorer long-term outlook, the first patient made a dramatic recovery and has raised therapeutic dilemmas as to the total duration of continuing albendazole therapy. The literature documents some 37 reports, mostly in adults. Considering the frequency of hydatid disease in South Africa, the incidence in our population could be under-recorded. Unless the clinician includes spinal hydatid disease, in endemic areas, as part of the differential list for paralysis and considers performing neuroimaging, this potentially treatable diagnosis will be missed.