• Journal of the korean academy of Pediatric Dentistry
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• v.27 no.4
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• pp.535-539
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• 2000

Ectopic eruption of a tooth into the oral environment occurs commonly whereas ectopic eruption of a tooth into other sites is rare. Those that have been reported include the nasal cavity, chin, mandibular condyles, coronoid processes, orbits and maxillary sinus. The etiologic factors of ectopic eruption are developmental disturbances such as cleft palate and teeth displaced by trauma or cysts, maxillary infection, genetic factors, crowding and exceptionally dense bone. In many cases, however, the etiology cannot be identified. Eruption of the teeth into the maxillary sinus is uncommon, however the identification of such teeth can be important since they have the potential to cause considerable morbidity. The definitive treatment is surgical removal of the teeth. A 7 year-old-boy visited the Department of Pediatric Dentistry, College of Dentistry, Yonsei University for treatment of dental caries. The abnormal erupting paths of the left and right maxillary canines were found during routine panoramic radiographic investigations. A panoramic radiograph taken at 13 years old revealed that two maxillary canines were located into the sinus. The teeth were extracted by the Caldwell-Luc approach.

• Journal of the korean academy of Pediatric Dentistry
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• v.27 no.3
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• pp.438-443
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• 2000

Ectopic eruption should be understood as a change in the course of the normal eruption path of a dental bud at any moment its origin. An example of this alteration is the dental transposition, a rare and more specific dental anomaly that may be defined as a change of position between two teeth. This case shows ectopic eruption of transposed mandibular lateral incisor beneath primary first molar at the first transitional period of the mixed dentition The crown of the lateral incisor has tipped distally, compelling root resorption and exfoliation of the adjacent primary cuspid and primary first molar. The reason for such eruption is not clearly understood, but it may involve; (1)trauma history, (2)prolonged retention of the deciduous teeth, (3)premature exfoliation of the deciduous teeth, and (4)genetic factor. Treatment is divided into interceptive and definitive treatment. Ectopically erupting mandibular incisor tends to become transposed with the adjacent cuspid and thus seems to warrant early orthodontic intervention. Early treatment may obviate later extraction or transposition of the incisor and canine in the permanent dentition. Timing is an important factor to be considered regarding in the correction of the lateral incisor transposition. This case advocates treatment with an active orthodontic therapy at the early stage of the mixed dentiton, before the eruption of the permanent cuspid.

• The Journal of the Korean dental association
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• v.23 no.10 s.197
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• pp.827-827
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• 1985

• The Journal of the Korean dental association
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• v.23 no.11 s.198
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• pp.917-917
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• 1985

• The Journal of the Korean dental association
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• v.22 no.1 s.176
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• pp.6-6
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• 1984

• Proceedings of the Zoological Society Korea Conference
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• 2000.10a
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• pp.201.1-201
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• 2000

• 대한핵의학회:학술대회논문집
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• 1972.11a
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• pp.66.2-66.2
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• 1972

• Journal of Korean Neurosurgical Society
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• v.40 no.1
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• pp.47-50
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• 2006

This 51-year-old man suffered from paraparesis of 1-week history. On preoperative images, spinal cord compression by infiltrative vertebral mass was shown at T3 and T4 level. Several months earlier, he underwent surgical resection of left 2nd to 4th ribs, due to painful growing chest wall mass, which was proved to be hepatocellular carcinoma. All available diagnostic procedure failed to uncover origin of malignancy. Operation was followed by adjuvant irradiation and chemotherapy to the vertebral mass, however he only to die in 3 months after operation. This is an extremely rare case of ectopic hepatocellular carcinoma at thoracic vertebrae which showed very aggressive clinical course. Possible pathogenic process is presented and discussed.

• 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.

• Korean Journal of Bronchoesophagology
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• v.16 no.1
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• pp.64-67
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• 2010

Congenital esophageal stenosis due to tracheobronchial remnants is a rare anomaly, resulting in dysphagia and recurrent pneumonia, We have experienced three cases of csophageal stenosis due to ectopic tracheobronchial remnants and performed operative correction. Two patients were 20 months and five year old male with a chief complaints of swallowing difficulty from birth and the other was a twenty three year old female with a slowly increasing symptom of dysphagia for twenty years. Esophagogram of the patient with tracheobronchial remnants shows abrupt narrow segment at distal esophagus with marked proximal dilatation, and linear barium collections perpendicularly projecting from the stenotic esophagus. All of them were performed surgical correction by esophagectomy of the stenotic portion and esopahgo-gastrostomy with anti-reflux procedures, The resected specimens of these patients showed ectopic tracheobronchial chondroepithelial tissue within the esophageal wall histopathologically. Postoperative course was uneventful and have been in good condition without any problems.