PURPOSE: The aim of this study was to define the capsules of synchronous multicentric small hepatocellular carcinomas (HCCs) with use of high-frequency intraoperative ultrasonography (IOUS). METHODS: Among the 131 consecutive patients undergoing hepatic resection and high-frequency IOUS for HCC, 16 synchronous multicentric small HCCs in 13 patients were histologically diagnosed in the resected specimens. High-frequency IOUS and pathologic findings of these lesions were compared, with particular focus on the presence and appearance of the capsule in or around each lesion. RESULTS: Synchronous multicentric small HCCs were pathologically classified into distinctly nodular (n=12) or vaguely nodular (n=4) types. All 12 distinctly nodular HCCs including six subcentimeter lesions showed detectable capsules on high-frequency IOUS and pathology. The capsules appeared as a hypoechoic rim containing hyperechoic foci (n=6), hypoechoic rim (n=5), or hyperechoic rim (n=1) with varying degrees of coverage around each lesion. Histologically, the capsules were composed of a combination of one to four layers consisting of a fibrous capsule, peritumoral fibrosis, prominent small vessels, and entrapped hepatic parenchyma. CONCLUSION: Synchronous multicentric small HCCs with distinctly nodular type, even at subcentimeter size, can show capsules with varying coverage and diverse echogenicity on high-frequency IOUS.
Capsules ; Carcinoma, Hepatocellular* ; Fibrosis ; Humans ; Liver Neoplasms ; Pathology ; Ultrasonography*

Thallium-201 SPECT studies were done on 32 patients with brain tumors : 20 patients with glioma, 3 patients with meningiomas, 2 patients with metarastasis, 2 patients with pineal tumors, 1 patient each with germinoma, neurinoma, neurocytoma, and 2 postradiation patients. A 201T1 index was based on the ratio of thallium uptake tumor versus the homologous contralateral brain. It was calculated and compared with tumor histology. There was a substantial uptake of 201T1 in high grade gliomas with no uptake in low grade glioma. Meningiomas and metastatic tumors show hot uptake, revealing that 201T1 uptake is not exclusive to high grade gliomas. In conclusion, 201TI SPECT could distinguish the benign and malignancy, and seems to be useful in the follow-up after treatment, to period low-or high-grade lesions.
Brain Neoplasms* ; Brain* ; Follow-Up Studies ; Germinoma ; Glioma ; Humans ; Meningioma ; Neurilemmoma ; Neurocytoma ; Pinealoma ; Thallium ; Tomography, Emission-Computed, Single-Photon*

We report here on an unusual case of mucinous cystic tumor that was associated with endometriosis in the cecum. A 45-year-old woman was admitted to the hospital due to her 5 day history of right lower quadrant abdominal pain with a mild fever. A laparotomy was performed under the clinical impression of the tubo-ovarian abscess. A relatively well defined a multi-locular cystic mass (8.0x8.0x7.0 cm) filled with white-to-yellow thick mucoid material was found in the wall of the cecum. The right ovary and fallopian tube showed marked fibrous adhesion to the external surface of the cecal mass. A right hemicolectomy and salpingo-oophorectomy were performed. Histologically, the tumor was similar to those of ovarian borderline mucinous tumor, the intestinal type, and the mucinous epithelium of the tumor was merged with the endometriotic epithelium and stroma. On immunostaining, the CK20 positive mucinous epithelium was well demarcated from the CK7 endometriotic epithelium. This is the first case of low-grade mucinous cystic tumor intimately associated with intestinal endometriosis in the cecum.
Abdominal Pain ; Abscess ; Cecum* ; Endometriosis ; Epithelium ; Fallopian Tubes ; Female ; Fever ; Humans ; Laparotomy ; Middle Aged ; Mucins* ; Ovary

Locating a corticotropin-releasing hormone (CRH)- or adrenocorticotropic hormone (ACTH)-secreting tumor is challenging. A 69-year-old woman admitted to our hospital for generalized edema was diagnosed with ectopic Cushing's syndrome. We attempted to find an ectopic tumor and could establish no ectopic focus except a retropharyngeal mass in the neck. We diagnosed the retropharyngeal mass as thyroid papillary carcinoma and examined whether the thyroid papillary carcinoma was the ectopic focus. No relationship between thyroid papillary carcinoma and ectopic Cushing's syndrome has been established. We failed to find another ectopic focus, except for the increased uptake of the retropharyngeal mass on fluorodeoxyglucose positron emission tomography (FDG-PET). Ectopic Cushing's syndrome combined with thyroid papillary carcinoma is very rare, so we report this case along with reviews of related literatures.
Adrenocorticotropic Hormone ; Aged ; Carcinoma ; Carcinoma, Papillary ; Corticotropin-Releasing Hormone ; Cushing Syndrome ; Edema ; Female ; Humans ; Neck ; Positron-Emission Tomography ; Thyroid Gland ; Thyroid Neoplasms

BACKGROUND: The mortality of liver abscess has remained relatively constant during this century despite earlier diagnosis, treatment of underlying causes and more aggressive antibiotics therapy. The aims of this study were to evaluate the risk factors that associated with mortality of liver abscess. METHODS: This study was carried out retrospectively including 70 patients with liver abscess from January 1992 to August 2001. The clinical features, laboratory, imaging, and microbiologic findings, management strategy, and final outcome were studied, and prognostic factors were analyzed. RESULTS: There were 37 males and 33 females whose ages ranged from 17 to 89 years. The mean age of the patients was 57 years, and the male to female ratio was 1.1:1. In the major part of patients, the abscess was located in the right lobe (61.4%) and single in number (78.5%). Upper abdominal pain, fever and chills were the most common symptoms, and right upper abdominal tenderness was the most common physical findings. Twenty-six percent of patients were diabetic and 40%, 10% had biliary tract disease, malignancy on presentation, respectively. A hypoalbuminemia ( Abdominal Pain ; Abscess ; Anti-Bacterial Agents ; Biliary Tract Diseases ; Catheters ; Chills ; Diabetes Mellitus ; Diagnosis ; Drainage ; Female ; Fever ; Humans ; Hypoalbuminemia ; Liver Abscess* ; Liver* ; Male ; Mortality ; Needles ; Pneumonia ; Retrospective Studies ; Risk Factors

A 67-year-old man presented with a 3-month history for intermittent epigastric pain and postprandial discomfort. Upper gastrointestinal endoscopy and contrast-enhanced axial computed tomographic scan demonstrated two separate tumors of the gastric antrum and the duodenal second portion, suggestive of the preoperative diagnosis of a double primary cancer. Pancreaticoduodenectomy with lymph node dissection was performed, and the microscopic features and immunohistochemical profiles of the resected specimen confirmed the diagnosis of the composite neuroendocrine carcinoma with adenocarcinoma of the stomach (mixed exocrine-endocrine carcinoma).
Adenocarcinoma* ; Aged ; Carcinoma, Neuroendocrine* ; Diagnosis ; Endoscopy, Gastrointestinal ; Humans ; Lymph Node Excision ; Neuroendocrine Tumors ; Pancreaticoduodenectomy ; Pyloric Antrum ; Stomach*

Neuroendocrine carcinomas of the colon and rectum are rare and have been known as either carcinoid tumors or undifferentiated cancers in the past. This type of tumor frequently occurred at cecum and is known for its aggressiveness and poor prognosis, differing from adenocarcinoma of colon. There has been no literature which describes endoscopic findings of colonic neuroendocrine carcinoma. Therefore, we report a case of neuroendocrine carcinoma of cecum in 36-year-old man with endoscopic findings. After right hemicolectomy followed by adjuvant chemotherapy, we have followed up the patient for 6 months without the evidence of recurrence.
Adenocarcinoma ; Adult ; Carcinoid Tumor ; Carcinoma, Neuroendocrine* ; Cecum* ; Chemotherapy, Adjuvant ; Colon ; Humans ; Peritonitis* ; Prognosis ; Rectum ; Recurrence

Solitary tubulovillous adenoma of the duodenal bulb is a rare tumor, which has not been reported in the Korean literature. Most of duodenal adenoma is located in the second portion of the duodenum. We report an unusual case of tubulovillous adenoma of the duodenal bulb. The lesion was treated by the endoscopic mucosal resection and was histologically diagnosed as tubulovillous adenoma.
Adenoma