Stereotactic radiosurgery for brain metastasis in non-small cell lung cancer

PURPOSE: Stereotactic radiosurgery (SRS) has been introduced for small-sized single and oligo-metastases in the brain. The aim of this study is to assess treatment outcome, efficacy, and prognostic variables associated with survival and intracranial recurrence. MATERIALS AND METHODS: This study retrospectively reviewed 123 targets in 64 patients with non-small cell lung cancer (NSCLC) treated with SRS between January 2006 and December 2012. Treatment responses were evaluated using magnetic resonance imaging. Overall survival (OS) and intracranial progression-free survival (IPFS) were determined. RESULTS: The median follow-up was 13.9 months. The median OS and IPFS were 14.1 and 8.9 months, respectively. Fifty-seven patients died during the follow-up period. The 5-year local control rate was achieved in 85% of 108 evaluated targets. The 1- and 2-year OS rates were 55% and 28%, respectively. On univariate analysis, primary disease control (p or =65 years; p = 0.036) were significant predictive factors for OS. Primary disease control (p = 0.041) and ECOG status (p = 0.017) were the significant prognostic factors for IPFS. Four patients experienced radiation necrosis. CONCLUSION: SRS is a safe and effective local treatment for brain metastases in patients with NSCLC. Uncontrolled primary lung disease and ECOG status were significant predictors of OS and intracranial failure. SRS might be a tailored treatment option along with careful follow-up of the intracranial and primary lung disease status.

Late Presentation of Metastatic Renal Cell Carcinoma as a Bleeding Duodenal Mass / 대한내과학회지

Gastrointestinal metastasis of a renal cell carcinoma is very rare, and the clinical course of the disease ranges from months to several decades. We experienced a case of solitary duodenal metastasis about 22 years after a right nephrectomy for clear-cell type renal cell carcinoma in a 77-year-old man who complained of melena. This case is the longest reported time interval between surgical nephrectomy to presentation with a duodenal metastasis. Patients usually present with recurrence within a year after radical nephrectomy but can present after many years, warranting lifelong surveillance.

Predictable Factors of Histologic Discrepancy of Gastric Cancer between the Endoscopic Forceps Biopsy and Endoscopic Treatment Specimen / 대한소화기학회지

BACKGROUND/AIMS: Recently, variable gastrointestinal track tumors including early stage malignancies are treated by endoscopic procedure. However, the discrepancy of histologic diagnosis may sometimes exist between the pretreatment forceps biopsy results and those of post treatment specimen. So the prediction of malignant lesion is important in the aspect of treatment selection. In this study, we investigated the predictable factors of the histologic discrepancy through the clinical, endoscopic features of the lesion diagnosed as adenocarcinoma in the post-endoscopic treatment specimen after the adenoma was diagnosed by the endoscopic forceps biopsy. METHODS: From March 2005 to April 2009, 129 gastric tumor lesions (129 patients) which were not diagnosed as malignancy and treated with endoscopic procedure were enrolled retrospectively. We compared the pretreatment endoscopic forceps biopsy results and post-treatment specimen biopsy results, then, analyzed the tumor characteristics. RESULTS: Twenty-one cases (16.3%) were diagnosed as malignancy after endoscopic treatment. Especially, discrepancy occurred more frequently in depressed lesions than in flat or elevated lesions (41.7% vs. 13.7%, p=0.012), and in lesions diagnosed as high grade adenomas than low or moderate grade adenomas (33.3% vs. 11.1%. p=0.004). CONCLUSIONS: In cases of depressed type lesions in the pretreatment endoscopy or those diagnosed as high grade adenoma in the pretreatment forceps biopsy, we should consider combined malignant lesion. Therefore, treatment modalities ensuring accurate diagnosis and potentially curative resection, should be carefully selected and performed in cases which have these features.

Polyarteritis Nodosa Localized in Small Intestine: A Case Report / 대한소화기내시경학회지

Polyarteritis nodosa is a systemic necrotizing vasculitis that affects mainly small and medium-sized arteries that involve multiple organs. In addition to the systemic involvement of classical vasculitis, localized vasculitis involves blood vessels within a confined vascular distribution or single organ without clinical evidence of generalized inflammation. Localized vasculitis of the gastrointestinal tract is a rare entity. In particular, a limited involvement of the small bowel is an unusual manifestation of polyarteritis nodosa. In this report, we describe a case of biopsy-proven polyarteritis nodosa presenting as small bowel bleeding without other systemic manifestations.

A Case of Lymphoid Polyp in the Ampulla of Vater Associated with Tubulopapillary Adenoma / 대한소화기내시경학회지

Lymphoid polyp is a very rare disease that commonly occurs in the rectum. It is a benign, focal or diffuse lesion that typically occurs where clusters of lymphoid follicles are present. The polyp is composed of well differentiated lymphoid tissue. It can generally be differentiated from malignant lymphoma by the proliferation of normal lymphoid tissue, which has a prominent follicular pattern and a clearly defined germinal center. There have been only a few reports of lymphoid polyps of the rectum, and there have been no reports of lymphoid polyp in the ampulla of Vater. We experienced a case of lymphoid polyp in the ampulla of Vater associated with tubulopapillary adenoma, and the patient first presented with jaundice, weight loss and general weakness.

Estimation of CyberKnife Respiratory Tracking System Using Moving Phantom / 의학물리

In this study, we evaluated accuracy and usefulness of CyberKnife Respiratory Tracking System (SynchronyTM, Accuray, USA) about a moving during stereotactic radiosurgery. For this study, we used moving phantom that can move the target. We also used Respiratory Tracking System called Synchrony of the Cyberknife in order to track the moving target. For treatment planning of the moving target, we obtained an image using 4D-CT. To measure dose distribution and point dose at the moving target, ion chamber (0.62 cc) and gafchromic EBT film were used. We compared dose distribution (80% isodose line of prescription dose) of static target to that of moving target in order to evaluate the accuracy of Respiratory Tracking System. We also measured the point dose at the target. The mean difference of synchronization for TLS (target localization system) and Synchrony were 11.5+/-3.09 mm for desynchronization and 0.14+/-0.08 mm for synchronization. The mean difference between static target plan and moving target plan using 4D CT images was 0.18+/-0.06 mm. And, the accuracy of Respiratory Tracking System was less 1 mm. Estimation of usefulness in Respiratory Tracking System was 17.39+/-0.14 mm for inactivity and 1.37+/-0.11 mm for activity. The mean difference of absolute dose was 0.68+/-0.38% in static target and 1.31+/-0.81% in moving target. As a conclusion, when we treat about the moving target, we consider that it is important to use 4D-CT and the Respiratory Tracking System. In this study, we confirmed the accuracy and usefulness of Respiratory Tracking System in the Cyberknife.

A case of intussusception by appendiceal mucocele / 대한내과학회지

Intussusception of the appendix is not only extremely rare but also presents with symptoms similar to appendicitis. Therefore, preoperative diagnosis is unusual. On the other hand, appendiceal mucocele refers to obstructive dilatation of the appendiceal lumen caused by mucus. It has been reported in 0.2~0.3% of appendectomy specimens. A 22-year-old woman visited the Emergency Department because of right lower abdominal tenderness with hematochezia. Abdominal CT scan revealed a target sign in the right lower quadrant area that was suggestive of intussusception. The patient underwent emergency surgical reduction of the intussusception and appendectomy. The pathology showed an appendiceal mucocele.

Identification of parasite DNA in common bile duct stones by PCR and DNA sequencing

We attempted to identify parasite DNA in the biliary stones of humans via PCR and DNA sequencing. Genomic DNA was isolated from each of 15 common bile duct (CBD) stones and 5 gallbladder (GB) stones. The patients who had the CBD stones suffered from cholangitis, and the patients with GB stones showed acute cholecystitis, respectively. The 28S and 18S rDNA genes were amplified successfully from 3 and/or 1 common bile duct stone samples, and then cloned and sequenced. The 28S and 18S rDNA sequences were highly conserved among isolates. Identity of the obtained 28S D1 rDNA with that of Clonorchis sinensis was higher than 97.6%, and identity of the 18S rDNA with that of other Ascarididae was 97.9%. Almost no intra-specific variations were detected in the 28S and 18S rDNA with the exception of a few nucleotide variations, i.e., substitution and deletion. These findings suggest that C. sinensis and Ascaris lumbricoides may be related with the biliary stone formation and development.

A bleeding by colonic invasion of chest wall metastasis of hepatocellular carcinoma after RFA / 대한내과학회지

Radiofrequency ablation (RFA) has been widely used for treating localized hepatocellular carcinoma (HCC). Metastasis to the chest wall through the tract during performing RFA may occur uncommonly. However, it is extremely rare that massive hematochezia occurs by colonic invasion of metastatic focus on chest wall. A 48-year-old man was presented with approximately 500 cc of hematochezia. He was diagnosed as having HCC 6 years ago, and underwent RFA 3 times over a period of 5 years. Twelve months ago, right lobectomy was done on recurred lesion. 5 months ago, HCC recurred through invasion to the chest wall involving the right 5th rib, but there have been no recurrent tumor masses on the liver on CT until admission. Emergent colonoscopy demonstrated a 3 x 3 cm sized extrinsic mass on proximal transverse colon that had a blood clot. Pathology from colonic mass revealed pseudoglandular type of HCC.

A case report of nonepisodic angioedema with eosinophilia in a Korean patient and a review of the Korean literature

Episodic angioedema with eosinophilia (EAE) is characterized by recurrent angioedema, peripheral eosinophilia, elevated serum IgM, fever, weight gain, and a benign course lacking any internal organ involvement. Dozens of cases of the nonepisodic variant (NEAE), which is limited to a single attack, have been reported in Japan. These NEAE cases normally have been less severe than the episodic type. In this paper, we describe the case of a Korean patient whose clinical and laboratory findings were consistent with NEAE, and review five other cases of EAE and NEAE reported in the Korean literature. The Korean NEAE cases outlined in this paper demonstrate that, as in Japan, NEAE is not uncommon in Korea, and also suggest that this disease exhibits a cultural predilection for Asian populations.

Benign Metastasizing Pulmonary Leiomyoma with Hemoptysis / 결핵및호흡기질환

A benign metastasizing pulmonary leiomyoma(BMPL) is a rare disease that is usually detected years after a hysterectomy or myomectomy. Despite the benign pathological appearance, these tumors can metastasize and become clinically malignant. Recently, we experienced case of BMPL with hemoptysis. A 43-year-old woman, who had undergone a hysterectomy due to uterine leiomyoma 8 years ago, visited our department complaining of intermittent hemoptysis. A chest CT showed bilateral multiple nodular lesions. Video-associated thoracoscopy was performed. The resected small nodular lesion revealed the proliferation of spindle cells without mitosis or nuclear atypism. The lesions tested positive to the smooth muscle marker (actin) by immunohistochemical staining. Therefore, the multiple nodules were considered as benign metastasizing pulmonary leiomyoma from a uterine leiomyoma. GnRH analogue therapy was initiated. A chest CT showed that the size and number of pulmonary lesions did not change after 3 months, and the patient was symptom free.

Benign Metastasizing Pulmonary Leiomyoma with Hemoptysis / 결핵및호흡기질환

A benign metastasizing pulmonary leiomyoma(BMPL) is a rare disease that is usually detected years after a hysterectomy or myomectomy. Despite the benign pathological appearance, these tumors can metastasize and become clinically malignant. Recently, we experienced case of BMPL with hemoptysis. A 43-year-old woman, who had undergone a hysterectomy due to uterine leiomyoma 8 years ago, visited our department complaining of intermittent hemoptysis. A chest CT showed bilateral multiple nodular lesions. Video-associated thoracoscopy was performed. The resected small nodular lesion revealed the proliferation of spindle cells without mitosis or nuclear atypism. The lesions tested positive to the smooth muscle marker (actin) by immunohistochemical staining. Therefore, the multiple nodules were considered as benign metastasizing pulmonary leiomyoma from a uterine leiomyoma. GnRH analogue therapy was initiated. A chest CT showed that the size and number of pulmonary lesions did not change after 3 months, and the patient was symptom free.

Early Therapeutic Effects of Cyberknife Radiosurgery on Trigeminal Neuralgia / 대한방사선종양학회지

PURPOSE: We evaluated whether Cyberknife radiosurgery is an effective and safe method of therapy for medically intractable trigeminal neuralgia (TN). MATERIALS AND METHODS: We retrospectively analyzed the outcome of 26 patients, who failed to surgery or were not suitable candidates for invasive intervention and were treated by Cyberknife radiosurgery between March 2004 and May 2005. Radiosurgery doses of 60~64 Gy were delivered to the 80% isodose line prescribed to an 6 mm length of the nerve, sparing the most proximal 3 mm away from the trigeminal nerve root entry zone (median dose: 64 Gy). RESULTS: Follow-up period was 3~15 months (median follow-up period: 9 months) Preliminary results from a cohort of 26 patients undergoing Cyberknife radiosurgery for TN showed that pain relief was achieved in 50% (13/26) of patients within the first 24 hrs after treatment. At last follow-up, 96.2% (25/26) of patients reported early pain relief within 7 days. Treatment failure developed in 2 of 26. Poor response occurred in one patient and relapse was observed in the other patient. 3 patients had hypoesthesia (11.5%), which was the only complication observed with any of our patients. CONCLUSION: With these results, authors assumed that Cyberknife radiosurgery for TN could be one of safe and effective therapeutic methods.

Reinduction of Hyponatremia by Vasopressin to Prevent Osmotic Demyelinating Syndrome / 대한신장학회잡지

Rapid correction of chronic hyponatremia can be associated with osmotic demyelinating syndrome leading to irreversible brain injury. Therefore, the primary efforts must be focused on maintaining appropriate correction rate (<10-15 mEq/L/24hr). But overcorrection may occur unpredictably in various circumstances. However, several reports showed that rapid relowering of the serum sodium level prevents osmotic demyelinating syndrome and reduces neurological injury. We report two cases of overcorrected chronic hyponatremia. After overshooting, we considered the risk of osmotic demyelinating syndrome and injected vasopressin to patients. The serum sodium concentrations were relowered immediately with no neurological deficit. There was no significant side effect of vasopressin.

Development of Total Body Irradiation Program / 의학물리

In total body irradiation (TBI) for leukemia, we have a two methode. One is a AP (anterior-posterior) method and the other is a Lateral methode. Our hospital used lateral methode. TBI must consider about body contour, because of homogeneous dose distribution. For compensation about irregular body contour, we use compensator. For TBI treatment, we must be considered, accurate manufacture of compensator and accurate calculation of dose. We developed the automatic program for TBI. This program accomplished for compensator design and dose calculation for irregular body. This program was developed for uses to use in a windows environment using the IDL language. In this program, it use energy data for each energy: TMR, output factor, inverse square law, spoiler, field size factor. This program reduces the error to happen due to the manual. As a development of program, we could decrease the time of treatment plan and care the patient accurately.