• Journal of Korean Neurosurgical Society
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• v.58 no.6
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• pp.563-565
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• 2015

Juxtafacet cysts are implicated in neural compression. Thus far, it is known that surgical removal is the definitive treatment for symptomatic juxtafacet cyst because spontaneous regression is rare, and the failure rate of conservative treatment is high. We have reported a rare case of right-sided juxtafacet cyst development after the spontaneous resolution of contralateral left-sided facet cyst. The left-sided facet cyst resolved spontaneously without surgical treatment, but a juxtacyst developed on the contralateral facet on the right side, as illustrated on 4-year follow-up magnetic resonance images. To the best of our knowledge, this is the first report of newly developed contralateral juxtafacet cyst after spontaneous regression. Herein, we have discussed the natural history and the management of this rare case.

• Korean Journal of Environmental Biology
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• v.36 no.1
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• pp.82-89
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• 2018

To investigate the occurrences of resting cysts of Diplopsalis and Protoperidinium species, sediment trap samples were collected from Gamak Bay, Korea. Based on the germination experiments, nine species of order Peridiniales were identified; cyst of Diplopsalis lebourae, cyst of Protoperidinium excentricum, cyst of Protoperidinium sp. cf. nudum, cyst of Protoperidinium obtusum, cyst of Protoperidinium ventricum, cyst of Protoperidinium sp.1, cyst of Protoperidinium sp.2, Protoperidinium sinuosum (Brigantedinium majusculum) and unidentified Peridiniales.

• Journal of Korean Neurosurgical Society
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• v.40 no.2
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• pp.69-73
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• 2006

Objective : The optimal surgical treatment for symptomatic middle cranial fossa arachnoid cysts is controversial. Therapeutic options include endoscopic fenestration, excision, cyst shunting, and craniotomy for fenestration of basal cistern. We reviewed the results of surgically treated middle cranial fossa arachnoid cysts. Methods : We performed a retrospective study in 18 cases of middle cranial fossa arachnoid cysts who had been treated with microsurgical fenestration between 1995 to 2003. The analysis was based on the results of the patients' age, sex distribution, developed area, clinical symptoms, treatment method, and complications. Results : Eighteen surgical treated middle cranial fossa arachnoid cysts patients were evaluated. The age range of cyst development was between 2 years and 44 years with the average of 16.4 years. The follow-up periods averaged 31.48 months. There were 15 male and 3 female patients, with significantly more cyst development in males than females. The most common clinical symptom was headache, followed by seizure. In the entire series, 77.8% of patients demonstrated a decrease in cyst size In serial imaging studies. Of them, 67.3% demonstrated a complete cyst effacement. Overall, 100% of patients with Grade I cysts, 81.8% of patients with Grade II cysts, 60% of patients with Grade III cysts exhibited evidence of decrease in cyst size during long-term monitoring. Complications included headache, meningitis, and hydrocephalus. Conclusion : Patients who were treated with microsurgical fenestration showed good outcome with acceptable complications. We concluded that microsurgical fenestration is a safe and effective surgical method for middle cranial fossa arachnoid cysts.

• Journal of Korean Neurosurgical Society
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• v.30 no.sup2
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• pp.211-215
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• 2001

Objective : The present study was performed to analyze treatment results for 22 cases of arachnoid cyst and to have appropriate surgical method in our department. Material and Methods : We performed a retrospective study in 22 cases in 11 years between 1989 to 2000 that could be followed up. The analysis was based on the results of patients age, sex distribution, developed area, clinical symptom, treatment method, and complication. Results : The age range of cyst development was between 7 months to 60 years with the average age of 21 years. As for sex distribution, 20 were male and 2 were female, with significantly more cyst development in males than females. Thirteen cases were developed in the sylvian fissure, 3 cases in the posterior fossa, 4 cases in the cerebral convexity of the supratentorial area, 1 case in the suprasella and 1 case in interhemiphere. Those cases with the sylvian fissure involvement included 6 cases of Type I, 4 cases of Type II, and 3 cases of Type III. As for the distribution according to hemisphere, more arachnoidal cysts were seen in the right hemisphere. The most common clinical symptom was headache, followed by seizure and speech disturbance. As for the treatment method in 22 cases, surgery was performed in 17 cases and conservative treatment in 5 cases. Fenestration was performed in 14 cases. 13 cases of them showed good outcome, and 1 case with delayed development showed no improvement. Cyst-peritoneal shunt was done in 2 cases. Both fenestration and cyst-peritoneal shunt were done in 1 case. Conclusion : Patients who perforemed fenestration were showed good outcome with few complication. We concluded that fenestration is the most appropriate surgical method for arachnoid cyst.

• Journal of Korean Neurosurgical Society
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• v.30 no.sup2
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• pp.364-367
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• 2001

A 4-month-old female patient admitted because of hydrocephalus. She was premature infant with germinal matrix hemorrhage at gestational period 27 wks. A ventriculoperitoneal shunt with a low-pressure type valve was placed. Follow-up CT scan obtained 3 months after VP shunt placement, revealed a new Lt. middle cranial fossa cyst. The girl was readmitted to hospital at 7 months after VP shunt placement, complaining of lethargy and vomiting. A CT scan was demonstrated a increase in size of a cyst, She subsequently underwent a left-sided pterional craniotomy with partial excision of membrane and cyst fenestration into the basal cisterns. Follow-up CT scan after 18 months revealed reaccumulation of cyst, the girl was reoperated on. After 2 months, the size of cyst was not decreased. Finally, She underwent a cystoperitoneal shunt. Follow-up CT scan after 5 months was demonstrated disappeared cyst and reexpansion of brain parenchyma. We report the development of a symptomatic sylvian fissure arachnoid cyst developed after ventriculoperitoneal shunt.

• Journal of Korean Neurosurgical Society
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• v.48 no.6
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• pp.551-554
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• 2010

We report a rare case of fibrous dysplasia with the development of a secondary aneurysmal bone cyst presenting as solitary tumor of calvarium. Although fibrous dysplasia with aneurysmal bone cyst is rare, it should be taken into account in differential diagnosis of the osteolytic solitary skull lesion.

• Korean Journal of Head & Neck Oncology
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• v.27 no.2
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• pp.234-236
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• 2011

Thyroglossal duct cyst is the most common congenital neck mass. It develops from remnants of precursors of thyroid gland left behind during embryologic descent form the foramen cecum at the tongue base into the anterior neck during fetal development. An anterior midline neck mass presenting before the age of twenty and displaying vertical movement with tongue protrusion and swallowing is characteristic of this lesion. In this paper, we report on a case of TGDC without remnant duct that is presenting as thyroid cyst.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.20 no.3
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• pp.237-240
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• 1998

Aneurysmal bone cyst is a benign lesion of bone consisting of a septated, cystic cavity filled with non-endothelium-lined, blood-filled spaces. As it grows, expanding and destroying the affected part of the bone by direct compression, the lesion characteristically produces a prominent bulging of the affected bone, which eventually erodes the overlying cortex. Patients rarely complain of pain unless the cyst affects adjacent nerves or its expasion is great enough to impinge on the surrounding joints and soft tissue. Teeth adjacent to the cyst may be displaced, but usually remain vital. Development of the lesion in the craniofacial region is rare, and the mandible is more often affected than the maxilla. Complete surgical excision is used to treat aneurysmal bone cyst, with either curettage or composite resection. This is a case report of 49 years old female with aneurysmal bone cyst treated with surgical excision & DFDB graft.

• Korean journal of applied entomology
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• v.19 no.1 s.42
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• pp.31-34
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• 1980

In pot experiment, relations between soybean cyst nematode, Heterodera glycines, and growth and yield of soybean were followed. Soybean growth and nodule development in plots which inoculated more than 16 cysts were reduced greatly from two month after inoculation. Tolerance limit was about 20 cysts per 500g of soil at seeding period. There was $60\%$ loss of grain yield 낀hen nematode population was 1 cyst/g of soil at seeding period. Reproduction of soybean cyst :nematode was good when initial population had been low. So, the final population was no difference depend on inoculation density.

• Journal of Korean Neurosurgical Society
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• v.52 no.2
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• pp.152-155
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• 2012

A Rathke's cleft cyst (RCC) is a benign pituitary cyst derived from the remnant of Rathke's pouch, and usually presents as an intrasellar lesion with varying degrees of suprasellar extension. However, to date, a description of a primary prepontine RCC with no intrasellar component has not been reported. The author describes an exceptional case of a symptomatic RCC located behind the sella turcica in a 41-year-old woman who presented with severe headache. The author also provides an embryological hypothesis of the development of an ectopic RCC, with a special emphasis on radiologic characteristics.