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Query: UMLS:C0027627 (metastases)
 103,950 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Primary cardiac neoplasms are rare, and are more commonly benign than malignant. However, metastases are by far the most common cardiac neoplasms. MRI allows evaluation of myocardial infiltration, pericardial involvement and/or extracardiac extension. MRI overcomes the usual limitations of echocardiography and assesses more accurately changes in cardiac function. Specific tumoral characterization is only possible in cases of myxoma, lipoma, fibroma and hemangioma. Suggestive features of malignancy are right side location, extracardiac extension, inhomogeneity in signal intensity of the tumor and pericardial effusion. The use of intravenous contrast material improves tumor characterization and depiction of tumor borders. MRI also allows differentiation of tumor from other nontumoral masses such as intracavitary tumors or fibromuscular elements of the posterior wall of the right atrium.
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PMID:Evaluation of cardiac tumors with magnetic resonance imaging. 1658 17

Intraarticular masses can be classified as noninfectious synovial proliferative processes (lipoma arborescens, synovial osteochondromatosis, pigmented villonodular synovitis, rheumatoid arthritis), infectious granulomatous diseases (tuberculous arthritis, coccidioidomycosis arthritis), deposition diseases (gout, amyloid arthropathy), vascular malformations (synovial hemangioma, arteriovenous malformations), malignancies (synovial chondrosarcoma, synovial sarcoma, synovial metastases), and miscellaneous (cyclops lesion). Knowledge of articular anatomy aids the radiologist in localizing masses to the joint space. Some joints have complex anatomy with contiguous or adjacent bursae, recesses, and tendinous connections from which masses may originate or into which masses may extend. Many of the diseases causing intraarticular masses have specific imaging characteristics, especially on magnetic resonance images, and knowledge of these characteristics will allow for a more confident diagnosis.
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PMID:Imaging of intraarticular masses. 1565 90

Fat-containing tumors of the liver are a heterogeneous group of tumors with characteristic histologic features, variable biologic profiles, and variable imaging findings. Benign liver lesions that contain fat include focal or geographic fatty change (steatosis), pseudolesions due to postoperative packing material (omentum), adenoma, focal nodular hyperplasia, lipoma, angiomyolipoma, cystic teratoma, hepatic adrenal rest tumor, pseudolipoma of the Glisson capsule, and xanthomatous lesions in Langerhans cell histiocytosis. Malignant liver lesions that can contain fat include hepatocellular carcinoma, primary and metastatic liposarcoma, and hepatic metastases. Identification of fat within a liver lesion can be critical in characterization of the lesion. The imaging characteristics of a lesion coupled with the pattern of intratumoral fatty change are helpful in narrowing the differential diagnosis. Although the presence of fat can be demonstrated with computed tomography or ultrasound, magnetic resonance imaging is the most specific imaging technique for demonstration of both microscopic and macroscopic fat.
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PMID:Fat-containing lesions of the liver: radiologic-pathologic correlation. 1579 52

While endobronchial lesions that present with symptoms of obstruction may be reflective of primary bronchogenic malignancy, there have been a number of reports of bronchial lesions other than primary bronchogenic carcinoma simulating primary endobronchial epithelial malignancy clinically. Twenty-five cases of symptomatic endobronchial disease were encountered with pathological assessment demonstrating an endobronchial process other than carcinoma, representing metastatic disease (breast, colon, renal, head and neck origin), fungal infection, Hodgkin's lymphoma, primary bronchogenic melanoma, lipoma, broncholith and inflammatory pseudopolyp. The present report underscores the potential pathogenetic heterogeneity encountered in lesions presenting with signs and symptoms of endobronchial obstruction, emphasizing the critical role of biopsy for establishing a definitive diagnosis.
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PMID:Endobronchial mimics of primary endobronchial carcinoma: a clinical study of 25 cases. 1587 62

This article provides an overview of the histopathologically defined nonneoplastic and neoplastic entities involved in submucosal lesions (SMLs) of the gastrointestinal tract, particularly those in the upper gastrointestinal tract. The gross appearance and the histomorphological and cytomorphological features of the most frequent SMLs are described, including gastrointestinal stromal tumor (GIST), leiomyoma, lipoma, carcinoid, granular-cell tumor, glomus tumor, schwannoma, submucosal metastases, Brunner's gland hamartoma, pancreatic rests, and cysts. The current state of important technical aspects of biopsy processing and the role of histology and cytology in the diagnosis of SMLs are discussed.
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PMID:Histopathological classification of nonneoplastic and neoplastic gastrointestinal submucosal lesions. 1601 Jun 7

The purpose of this article is to provide an update on imaging techniques useful for detection and characterization of fat in the liver. Imaging findings of liver steatosis, both diffuse steatosis and focal fatty change, as well as focal fatty sparing, are presented. In addition, we will review computed tomography (CT) and magnetic resonance (MR) findings of focal liver lesions with fatty metamorphosis, including hepatocellular carcinoma, hepatocellular adenoma, focal nodular hyperplasia, angiomyolipoma, lipoma, and metastases.
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PMID:Fat in the liver: diagnosis and characterization. 1647 2

Liposarcoma of the spermatic cord is rare. It usually presents as a painless slowly-growing scrotal mass of consistency like lipoma. Inguinal orchiectomy is an adequate surgical approach. Retroperitoneal lymphadenectomy is not indicated owing to the low malignancy potential of the sarcomas. Value of adjuvant radiotherapy/chemotherapy remains uncertain. Recurrences are frequent, owing to incomplete surgical removal of the tumor. We report on a 62 year old male who presented with a half a year history of a soft painless mass in the left scrotum extending from the groin up to the testis. Clinical examination suggested inguinal hernia. Radical orchiectomy was performed. Histological examination revealed a well-differentiated liposarcoma of sclerosing subtype. No evidence of recurrence or metastases has been noted during the 6-month and one year follow-up without any postoperative adjuvant therapy.
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PMID:[Liposarcoma of the spermatic cord]. 1673 50

Fatty tissues lesions are the most frequent of both benign (lipoma) and malignant tumor (liposarcoma) of soft tissues in the adult. We here describe the case of female patient having a fatty tissue mass of the ankle corresponding to an hemosiderotic fibrohistiocytic lipomatous lesion (HFHLL). This very rare tumour of recent description is specific of the ankle/foot area of the middle age women. These lesions are always benign and frequently recur following incomplete resection. This tumor may have invasive local growth and metastases have not been described so far. We describe the anatomopathologist's key points of their diagnostic. We discuss the main differentials diagnosis and treatment.
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PMID:[Hemosiderotic fibrohistiocytic lipomatous lesion: a new entity you must remind]. 1731 48

Magnetic resonance imaging is a routine diagnostic measure for a suspected intracerebral mass. Computed tomography is usually also indicated. Further diagnostic procedures as well as the interpretation of the findings vary depending on the tumor location. This contribution discusses the symptoms and diagnostics for supratentorial tumors separated in relation to their intra- or extracranial location. Supratentorial tumors include astrocytoma, differentiated by their circumscribed and diffuse growth, ganglioglioma, ependyoma, neurocytoma, primitive neuroectodermal tumors (PNET), oligodendroglioma, dysem-bryoplastic neuroepithelial tumors (DNET), meningoangiomatosis, pineal tumors, hamatoma, lymphoma, craniopharyngeoma and metastases. The supratentorial extracranial tumors include the choroid plexus, colloid cysts, meningeoma, infantile myofibromatosis and lipoma. The most common sub-forms, especially of astrocytoma, will also be presented.
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PMID:[Supratentorial tumors]. 1754 38

Defining the location of tumors and mass lesions of the spine in relation to the spinal cord and the dura is of the utmost importance as certain types of lesions tend to occur in certain locations. The differential diagnostic considerations will vary according to location of the mass lesion as will the treatment and prognosis of these various lesions. The category of extramedullary intradural masses includes a variety of lesions from meningiomas and nerve sheath tumors (neurofibromas, schwannomas) to less common tumors (hemangiopericytoma), metastases, benign tumors (lipoma, dermoid, epidermoid), inflammatory disorders (arachnoid adhesions, sarcoidosis), vascular lesions (spinal-dural arteriovenous fistula), and cystic lesions (perineural or Tarlov cysts). Characteristic magnetic resonance imaging findings are helpful for localization and characterization of these lesions before treatment, as well as for follow-up after treatment. We present a pictorial review of the various extramedullary intradural lesions of the spine, with pathologic correlation. We discuss imaging features that are typical for the various entities and describe various therapeutic options that are important considerations for surgical treatment of these lesions.
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PMID:Extramedullary intradural spinal tumors: a pictorial review. 1776 98


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