Biomaterial Database

Localized thymic amyloidosis presenting with myasthenia gravis: case report. 2014

Seung-Myoung Son, and Yong-Moon Lee, and Si Wook Kim, and Ok-Jun Lee

Department of Pathology, Chungbuk National University College of Medicine, Cheongju, Korea.

A mediastinal mass was incidentally found on chest radiography in a 46-yr-old woman who had had myasthenia gravis (MG) for 2 months. Computed tomography revealed a 4-cm in size, well-defined, and lobulating mass with nodular calcification that was located in the thymus. Microscopically, the mass consisted of diffuse amorphous eosinophilic materials. These deposits exhibited apple-green birefringence under polarized light microscopy after Congo red staining. Immunohistochemical analysis revealed that they were positive for both kappa and lambda light chains and negative for amyloid A. A diagnosis of localized primary thymic amyloidosis was finally made. After thymectomy, the symptoms of MG were controlled with reduced corticosteroid requirements. Localized thymic amyloidosis associated with MG has not been reported to date.

UI	MeSH Term	Description	Entries
D007145	Immunoglobulin kappa-Chains	One of the types of light chains of the immunoglobulins with a molecular weight of approximately 22 kDa.	Ig kappa Chains,Immunoglobulins, kappa-Chain,kappa-Immunoglobulin Light Chains,Immunoglobulin kappa-Chain,kappa-Chain Immunoglobulins,kappa-Immunoglobulin Light Chain,kappa-Immunoglobulin Subgroup VK-12,kappa-Immunoglobulin Subgroup VK-21,Chains, Ig kappa,Immunoglobulin kappa Chain,Immunoglobulin kappa Chains,Immunoglobulins, kappa Chain,Light Chain, kappa-Immunoglobulin,Light Chains, kappa-Immunoglobulin,kappa Chain Immunoglobulins,kappa Chains, Ig,kappa Immunoglobulin Light Chain,kappa Immunoglobulin Light Chains,kappa Immunoglobulin Subgroup VK 12,kappa Immunoglobulin Subgroup VK 21,kappa-Chain, Immunoglobulin,kappa-Chains, Immunoglobulin
D007146	Immunoglobulin lambda-Chains	One of the types of light chain subunits of the immunoglobulins with a molecular weight of approximately 22 kDa.	Ig lambda Chains,Immunoglobulins, lambda-Chain,Immunoglobulin lambda-Chain,lambda-1-Immunoglobulin,lambda-2-Immunoglobulin,lambda-Chain Immunoglobulins,lambda-Immunoglobulin Light Chain,lambda-Immunoglobulin Light Chains,lambda-x Immunoglobulin,Chains, Ig lambda,Chains, lambda-Immunoglobulin Light,Immunoglobulin lambda Chain,Immunoglobulin lambda Chains,Immunoglobulin, lambda-x,Immunoglobulins, lambda Chain,Light Chain, lambda-Immunoglobulin,Light Chains, lambda-Immunoglobulin,lambda 1 Immunoglobulin,lambda 2 Immunoglobulin,lambda Chain Immunoglobulins,lambda Chains, Ig,lambda Immunoglobulin Light Chain,lambda Immunoglobulin Light Chains,lambda x Immunoglobulin,lambda-Chain, Immunoglobulin,lambda-Chains, Immunoglobulin
D008482	Mediastinum	A membrane in the midline of the THORAX of mammals. It separates the lungs between the STERNUM in front and the VERTEBRAL COLUMN behind. It also surrounds the HEART, TRACHEA, ESOPHAGUS, THYMUS, and LYMPH NODES.
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009157	Myasthenia Gravis	A disorder of neuromuscular transmission characterized by fatigable weakness of cranial and skeletal muscles with elevated titers of ACETYLCHOLINE RECEPTORS or muscle-specific receptor tyrosine kinase (MuSK) autoantibodies. Clinical manifestations may include ocular muscle weakness (fluctuating, asymmetric, external ophthalmoplegia; diplopia; ptosis; and weakness of eye closure) and extraocular fatigable weakness of facial, bulbar, respiratory, and proximal limb muscles. The disease may remain limited to the ocular muscles (ocular myasthenia). THYMOMA is commonly associated with this condition.	Anti-MuSK Myasthenia Gravis,MuSK MG,MuSK Myasthenia Gravis,Muscle-Specific Receptor Tyrosine Kinase Myasthenia Gravis,Muscle-Specific Tyrosine Kinase Antibody Positive Myasthenia Gravis,Myasthenia Gravis, Generalized,Myasthenia Gravis, Ocular,Anti MuSK Myasthenia Gravis,Generalized Myasthenia Gravis,Muscle Specific Receptor Tyrosine Kinase Myasthenia Gravis,Muscle Specific Tyrosine Kinase Antibody Positive Myasthenia Gravis,Myasthenia Gravis, Anti-MuSK,Myasthenia Gravis, MuSK,Ocular Myasthenia Gravis
D002114	Calcinosis	Pathologic deposition of calcium salts in tissues.	Calcification, Pathologic,Calcinosis, Tumoral,Microcalcification,Microcalcinosis,Pathologic Calcification,Calcinoses,Calcinoses, Tumoral,Microcalcifications,Microcalcinoses,Tumoral Calcinoses,Tumoral Calcinosis
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000686	Amyloidosis	A group of sporadic, familial and/or inherited, degenerative, and infectious disease processes, linked by the common theme of abnormal protein folding and deposition of AMYLOID. As the amyloid deposits enlarge they displace normal tissue structures, causing disruption of function. Various signs and symptoms depend on the location and size of the deposits.	Amyloidoses
D013902	Radiography, Thoracic	X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs.	Thoracic Radiography,Radiographies, Thoracic,Thoracic Radiographies