Inflammatory Pseudotumor of the Liver Mimicking an Infiltrative Malignancy / 계명의대학술지

Inflammatory pseudotumor (IPT) is a relatively rare and benign disease characterized by chronic inflammatory cell infiltration with fibrosis. It is difficult to diagnose IPT because of the absence of specific symptoms or unique radiological findings. IPT can be mistaken for a malignant tumor, such as cholangiocarcinoma or hepatocellular carcinoma, due to their similar clinical and radiological findings. Unfortunately, hepatic resection is often performed due to misdiagnosis. Presented here is a case of a woman aged over 60 years who presented with general weakness lasting more than one month and unexplained body weight loss.

Spontaneously Regressed Immunoglobulin IgG4-related Lung Disease Presenting as Multiple Cavitary Nodules / 대한내과학회지

Immunoglobulin (Ig) G4-related disease was recently recognized as a systemic fibro-inflammatory disease characterized by dense lymphoplasmacytic infiltrates, storiform fibrosis, and obliterative phlebitis with IgG4-positive cells in the target tissues. This disease can localize to a single organ or be diffuse in multiple organs. Pulmonary manifestation in IgG4-related lung disease presents as various sized nodules, lung masses, patchy ground-glass opacities, consolidation, thickened bronchovascular bundles, nodular pleural lesions, and interstitial lung disease. Traditional treatment for IgG4-related lung disease includes systemic (cortico) steroids. Here, we report a case of IgG4-related lung disease presenting as multiple cavitary nodules that spontaneously regressed without systemic steroid use.

Extranodal Marginal Zone B-Cell Lymphoma of Mucosa-Associated Tissue Type Involving the Dura / Journal of the Korean Cancer Association, 대한암학회지

Primary central nervous system marginal zone B-cell lymphoma (MZBCL) is very rare, with only a few reported cases worldwide. It has an indolent disease course with high cure potential. We experienced a rare case of dural MZBCL of mucosa-associated lymphoid tissue (MALT) in a 69-year-old man who presented with headache. A magnetic resonance imaging scan of brain showed a 1.9×3.6-cm-sized extra-axial mass with a broad based dural attachment to the anterosuperior aspect of the falx cerebri, radiographically consistent with meningioma. Surgical resection yielded a MZBCL of the MALT type. Histopathology revealed a lymphoplasmacytic infiltration of the dura, and immunohistochemical study showed a B-cell phenotype with CD20, bcl-2, MUM-1, Ki-67 positive. He was treated with chemotherapy after complete surgical resection and remained free of disease at 30 months after chemotherapy. MALT lymphoma must be considered in the differential diagnosis in patients presenting radiographically with meningioma.

Extranodal Marginal Zone B-Cell Lymphoma of Mucosa-Associated Tissue Type Involving the Dura / Journal of the Korean Cancer Association, 대한암학회지

Primary central nervous system marginal zone B-cell lymphoma (MZBCL) is very rare, with only a few reported cases worldwide. It has an indolent disease course with high cure potential. We experienced a rare case of dural MZBCL of mucosa-associated lymphoid tissue (MALT) in a 69-year-old man who presented with headache. A magnetic resonance imaging scan of brain showed a 1.9×3.6-cm-sized extra-axial mass with a broad based dural attachment to the anterosuperior aspect of the falx cerebri, radiographically consistent with meningioma. Surgical resection yielded a MZBCL of the MALT type. Histopathology revealed a lymphoplasmacytic infiltration of the dura, and immunohistochemical study showed a B-cell phenotype with CD20, bcl-2, MUM-1, Ki-67 positive. He was treated with chemotherapy after complete surgical resection and remained free of disease at 30 months after chemotherapy. MALT lymphoma must be considered in the differential diagnosis in patients presenting radiographically with meningioma.