Biomaterial Database

Case report 657: Malignant epithelial thymoma with osteoplastic metastases. 1991

M K McLennan

Department of Radiology, Toronto Hospital, Canada.

Malignant epithelial thymomas are slowly growing anterior mediastinal tumors. Local invasion and intrathoracic spread are not uncommon. Evidence of extrathoracic metastases are found in up to 15% of patients, most commonly in the liver, kidney, and bone. Almost all reports of thymoma metastases to bone have described purely lytic lesions. Once extrathoracic metastatic deposits are discovered, the mean extent of survival is 18 months. A case of a malignant epithelial thymoma in a young woman with diffuse sclerotic metastases to bone is reported. This case is remarkable not only for the presence and extent of the osteoblastic metastases but also for the fact that this woman lived for 6 years following the discovery of the extrathoracic bone involvement.

UI	MeSH Term	Description	Entries
D008159	Lumbar Vertebrae	VERTEBRAE in the region of the lower BACK below the THORACIC VERTEBRAE and above the SACRAL VERTEBRAE.	Vertebrae, Lumbar
D010384	Pelvic Bones	Bones that constitute each half of the pelvic girdle in VERTEBRATES, formed by fusion of the ILIUM; ISCHIUM; and PUBIC BONE.	Coxal Bone,Hip Bone,Innominate Bones,Bone, Coxal,Bone, Hip,Bone, Innominate,Bone, Pelvic,Bones, Coxal,Bones, Hip,Bones, Innominate,Bones, Pelvic,Coxal Bones,Hip Bones,Innominate Bone,Pelvic Bone
D001859	Bone Neoplasms	Tumors or cancer located in bone tissue or specific BONES.	Bone Cancer,Cancer of Bone,Cancer of the Bone,Neoplasms, Bone,Bone Neoplasm,Neoplasm, Bone
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D013125	Spinal Neoplasms	New abnormal growth of tissue in the SPINE.	Neoplasm, Spinal,Neoplasms, Spinal,Spinal Neoplasm
D013945	Thymoma	A neoplasm originating from thymic tissue, usually benign, and frequently encapsulated. Although it is occasionally invasive, metastases are extremely rare. It consists of any type of thymic epithelial cell as well as lymphocytes that are usually abundant. Malignant lymphomas that involve the thymus, e.g., lymphosarcoma, Hodgkin's disease (previously termed granulomatous thymoma), should not be regarded as thymoma. (From Stedman, 25th ed)	Carcinoma, Thymic,Carcinomas, Thymic,Thymic Carcinoma,Thymic Carcinomas,Thymomas
D013953	Thymus Neoplasms	Tumors or cancer of the THYMUS GLAND.	Cancer of Thymus,Thymus Cancer,Thymus Tumors,Cancer of the Thymus,Neoplasms, Thymic,Neoplasms, Thymus,Thymic Cancer,Thymic Neoplasms,Thymic Tumors,Cancer, Thymic,Cancer, Thymus,Cancers, Thymic,Cancers, Thymus,Neoplasm, Thymic,Neoplasm, Thymus,Thymic Cancers,Thymic Neoplasm,Thymic Tumor,Thymus Cancers,Thymus Neoplasm,Thymus Tumor,Tumor, Thymic,Tumor, Thymus,Tumors, Thymic,Tumors, Thymus