Hepatic Immunoglobulin G4-related Inflammatory Pseudotumor Mimicking Hepatocellular Carcinoma

Immunoglobulin G4-related disease is a recently recognized entity characterized by a mass-forming or regional lesion that contains an extensive infiltration of IgG4-producing plasma cells with dense fibrosis. Immunoglobulin G4-related disease can affect any organ system, but solitary hepatic lesion of Immunoglobulin G4-related disease is very rare. This entity mimics primary malignant hepatic tumor, such as hepatocellular carcinoma or intrahepatic cholangiocarcinoma. We experienced a case of hepatic IgG4-related inflammatory pseudotumor in a 50-year-old woman, mimicking hepatocellular carcinoma.

Case of Brain Biopsy Proven Giant Cell Arteritis

Giant cell arteritis (GCA) is categorized as vasculitis of the large and medium-sized vessels. Visual loss is one potential consequence of cranial arteritis. Temporal artery biopsies are performed frequently to demonstrate the involvement of arteritis. On the other hand, cerebral artery involvement with pathological findings is not well documented in patients with GCA. We report a rare case of GCA with cerebral vessel involvement in a 76-year-old woman.

Spontaneous Pulmonary Hematoma with No Underlying Causes: A Case Report / 결핵및호흡기질환

A 57-year-old male patient was admitted to our center because of a cystic mass on the lower portion of the right major fissure that was found incidentally by chest X-ray. He did not have a history of trauma or anticoagulant use. The lesion was removed by video-assisted thoracoscopic surgery. Pathological examination revealed an organizing pulmonary hematoma without any complications, and a follow-up chest X-ray after 1 year showed no recurrence.

Bone Marrow Findings, and TNF-alpha, IL-18 Expression in Bone Marrow of Adult Onset Still's Disease Patients / 대한류마티스학회지

OBJECTIVE: Inflammatory cytokines may play important roles in the pathogenesis of adult onset Still's disease. The enhanced expression of IL-18 was reported in the bone marrow of a Japanese systemic onset juvenile rheumatoid arthritis patient but not in the other organs. To date, there are very few studies relating the bone marrow and AOSD. This study examined the bone marrow findings as well as TNF-alpha and IL-18 expression in the bone marrow of AOSD patients. METHODS: A retrospective study was performed on 15 AOSD patients who had undergone a bone marrow examination at a university hospital. The clinical and laboratory findings, as well as the bone marrow findings, were analyzed. Immunohistochemistry of IL-18 and TNF-alpha in bone marrow was performed. RESULTS: The bone marrow cellularity and myeloid/erythroid cell ratio showed no correlation with the clinical and laboratory findings. TNF-alpha was expressed at 0.8~9.8% and IL-18 was expressed at 0.4~9.8% of bone marrow cells. Cytokine expression was not associated with the clinical patterns of AOSD. The platelet count correlated with the bone marrow TNF-alpha expression but TNF-alpha did not correlate with IL-18 expression. CONCLUSION: TNF-alpha and IL-18 expression in bone marrow were observed in some AOSD patients but there was no correlation with the other clinical and laboratory findings except for the platelet count.