Hypopituitarism Secondary to Paraclinoid Internal Carotid Artery Aneurysm / 대한내과학회지

Pituitary insufficiency due to a sellar aneurysm is relatively uncommon. The prevalence of this disorder was <0.2% in a large cohort of patients with panhypopituitarism. While uncommon, a vascular sellar lesion should be included as a differential diagnosis for a sellar mass resulting in hypopituitarism. We report herein a case of hypopituitarism with hyperprolactinemia secondary to a large (1.7-cm) saccular aneurysm at the left paraclinoid internal carotid artery.

Right middle lobe syndrome caused by eosinophilic mucoid impaction in adults

Right middle lobe syndrome (RMLS) is defined as a transient or recurrent, chronic collapse of the middle lobe of the right lung by certain pathologic conditions. RMLS is a relatively uncommon condition having multiple etiologies and various clinical presentations. Two patients were referred to Hallym University Sacred Heart Hospital, one for the treatment of coughing and the other for the treatment of pneumonia. A diagnosis of RMLS was identified through X-ray and computed tomography image evaluation for each condition. Bronchoscopy revealed mucus obstruction in the right middle lobe bronchus. Biopsy of the aspirated mucus showed mucus containing many eosinophils and Charcot-Leyden crystals. After removal of impacted mucus, clinical and radiological improvements were observed in both patients. Therefore, eosinophilic mucus impaction can be considered a potential cause of RMLS, irrespective of any underlying asthmatic symptoms.

The pattern of movement and stress distribution during retraction of maxillary incisors using a 3-D finite element method / 대한치과교정학회지

OBJECTIVE: The purpose of this study was to evaluate the displacement pattern and the stress distribution shown on a finite element model 3-D visualization of a dry human skull using CT during the retraction of upper anterior teeth. METHODS: Experimental groups were differentiated into 8 groups according to corticotomy, anchorage (buccal: mini implant between the maxillary second premolar and first molar and second premolar reinforced with a mini implant, palatal: mini implant between the maxillary first molar and second molar and mini implant on the midpalatal suture) and force application point (use of a power arm or not). RESULTS: In cases where anterior teeth were retracted by a conventional T-loop arch wire, the anterior teeth tipped more postero-inferiorly and the posterior teeth moved slightly in a mesial direction. In cases where anterior teeth were retracted with corticotomy, the stress at the anterior bone segment was distributed widely and showed a smaller degree of tipping movement of the anterior teeth, but with a greater amount of displacement. In cases where anterior teeth were retracted from the buccal side with force applied to the mini implant placed between the maxillary second premolar and the first molar to the canine power arm, it showed that a smaller degree of tipping movement was generated than when force was applied to the second premolar reinforced with a mini implant from the canine bracket. In cases where anterior teeth were retracted from the palatal side with force applied to the mini implant on the midpalatal suture, it resulted in a greater degree of tipping movement than when force was applied to the mini implant between the maxillary first and second molars. CONCLUSION: The results of this study verifies the effects of corticotomies and the effects of controlling orthodontic force vectors during tooth movement.