Carcinosarcoma (True Malignant Mixed Tumor) of the Parotid Gland: A Report of a Case with Small Cell Carcinoma as the Carcinoma Component

True malignant mixed tumor (carcinosarcoma) of the salivary gland is an extremely rare tumor. By definition, it is a heterologous neoplasm that's composed of both malignant epithelial and mesenchymal components. We report here on a case of an 83 year old female patient with a parotid gland mass. Histologic examination showed a biphasic pattern of growth with both a poorly differentiated epithelial component and a sarcomatous spindle cell background. The immunohistochemical and ultrastructural findings support the diagnosis of a small cell neuroendocrine epithelial tumor and an undifferentiated malignant mesenchymal features. The histologic and ultrastructural features along with the immunohistochemical findings are presented. We also review the literature and we discuss the different opinions on the exact histogenesis of the true malignant mixed tumor of the salivary gland. To the best of our knowledge, this histological pattern has not been previously reported in the English medical literature.

Association between Diverticulosis and Colonic Neoplasm in Koreans / 대한소화기학회지

BACKGROUND/AIMS: Although a few published studies have reported on the relationship between diverticulosis and neoplasia in the west, it is not yet examined in Korea. The aim of this study was to determine whether there is an association between diverticulosis and colonic neoplasia. METHODS: We retrospectely analysed the medical records of 3,007 patients (M:F=1.3:1) who underwent colonoscopic examinations from year 2002 to year 2004. Patients who had a history of previous polypectomy, colon resection, or inflammatory bowel diseases were excluded. The size, extent (none, few, or many), and location of diverticuli and polyps were analyzed. RESULTS: Of 2,377 patients, included 57% were male and the mean age was 50.8 year-old. Nine percent of the patient had diverticulosis, 29% had more than one neoplasm, and 6% had advanced neoplasia. Patients with diverticular diseases had higher risks of any neoplasia than those without diverticulum (p=0.03, 37.7% vs. 28.2%). There was no correlation between diverticular diseases and advanced neoplasia. Patients with proximal diverticular diseases had higher risk of any proximal neoplasia than other patients (p<0.01 24.6% vs. 14.3%). Moreover, they had higher risk of proximal advanced neoplasia than others (p=0.01, 4.5% vs. 2%). In addition, comparison of multiple diverticular disease with few or no diverticuli revealed no difference in the risk of any neoplasia. CONCLUSIONS: These data show that the patients with diverticular diseases have more neoplasms than controls without diverticula.

Immunohistochemical Demonstration of Nerve Fibers of the Human Knee Synovium / 대한정형외과연구학회지

PURPOSE: To demonstrate the presence of nerve fibers including nociceptive fibers in synovium of human knee joint using immunohistochemistry. MATERIALS AND METHODS: 10 Synovial membrane tissues of knee joint obtained from 5 cadavers were analyzed immunohistochemically using antibodies to protein gene product 9.5, betaIII-tubulin, substance P and calcitonin gene-related peptide (CGRP). RESULTS: Many nerve fibers immunoreactive for protein gene product 9.5 and betaIII-tubulin were demonstrated in synovial folds of human knee joints. Also, immunostaining showed the presence of free nerve ending fibers immunoreactive for substance P and calcitonin gene-related peptide in synovium. CONCLUSION: The presence of putative nerve fibers including nociceptive fibers in synovial folds supports a possible role for theses structures as source of knee joint pain.

Coexistence of the Renal Fibromuscular Dysplasia and Familial Adenomatous Polyposis / 대한신장학회지

Fibromuscular dysplasia (FMD) is a nonatherosclerotic, noninflammatory vascular disease that most commonly affects the renal and internal carotid arteries. A Familial adenomatous polyposis (FAP) is characterized by hundreds of adenomatous colorectal polyps, with an almost inevitable progression to colorectal cancer. A 19-year-old woman with history of total colectomy as a result of familial adenomatous polyposis presented with high blood pressure incidentally. Abdominal CT scan showed "string of beads" appearance of right renal artery. Percutaneous transluminal renal angioplasty was performed and then hypertension was improved. To our knowledge, there has been no previous case report of secondary renovascular hypertension resulting from fibromuscular dysplasia in patients with FAP. Here, we report a patient with a review of the literature.

A Case of the Pedunculated Angiomyolipoma Attached to Renal Cortex / 대한신장학회지

A renal angiomyolipoma is uncommon congenital mixed tumor like formations consisting of blood vessel, smooth muscle cells and adipose tissue. We report a case of retroperitoneal hemorrhage from spontaneous rupture of renal angiomyolipoma in a 37 year-old woman that appeared unilateral and pedunculated attached to renal cortex. The patient presented with a clinical feature of flank pain and shock because of massive hemorrhage. Because the patient suffered from flank pain regardless of selective renal embolization, laparoscopic surgery was necessary to remove angiomyolipoma from renal cortex.

Extraskeletal Osteosarcoma of the Posterior Mediastinum: A Case Report

Extraskeletal osteosarcoma is a rare malignant tumor of soft tissue. In addition, there are only several cases of osteosarcoma of the mediastinum as a primary site in the world. We report a case of extraskeletal osteosarcoma arising in the posterior mediastinum. A 54-year-old man visited our hospital because of chest pain. Chest CT showed a 12 cm sized huge mediastinal mass. The mass revealed solid and ivory-colored cut surface with multifocally ovoid cystic spaces and hemorrhage. Microscopically, the tumor consisted of polygonal stromal cells, giant cells and varying amounts of neoplastic new bone, and mitotic figures were frequently observed. There were no distant metastasis and regional lymph node involvement.

Imaging Findings of Hepatic Paragonimiasis: A Case Report

Hepatic paragonimiasis is a rare form of ectopic infestation caused by Paragonimus. We experienced a case of hepatic paragonimiasis that showed characteristic imaging findings. CT and MR images showed a cluster of small cysts with rim enhancement in the subcapsular area of the liver. This finding seems to be characteristic for hepatic paragonimiasis, considering imaging findings in paragonimiasis involving other organs.

Primary Malignant Lymphoma of the Breast: Case report

The authors report a case of primary breast lymphoma in a 29-year-old female patient. The patient had a growing, nontender, palpable mass in the left breast. Film-screen mammogram showed a sharply marginated mass with a thin perimeter of radiolucency, halo and slight lobulation.Sonography revealed a well marginated hypoechoic mass with posterior acoustic enhancement. The patient had undergone wide excision of mass and ipsilateral axillary dissection. Histologic examination and immuno-histochemistry confirmed a diagnosis of diffuse B-cell type non-Hodgkin's lymphoma. Abdominal ultrasonography, thoracic computed tomography and bone scan, checked postoperatively, showed non-specific findings. We concluded a final diagnosis of primary breast lymphoma, and report the case with a brief review of the literatures.