Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0027627 (metastases)
 103,950 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Spontaneous neoplasms in 930 control Wistar rats from five carcinogenicity bioassays conducted between 1990 and 1995 were reviewed and compared with review findings in studies between 1980 and 1990. Mean survival at 104 weeks was 55% for males and 60% for females, similar to that of the previous review. A total of 1599 neoplasms was diagnosed in 361 (78%) male and 415 (89%) female rats; 1293 (81%) of these were benign and 306 (19%) were malignant (11% with metastases). Sixty-eight percent of all neoplasms were in endocrine and integumentary systems, similar to 74% seen in the previous review. Most common neoplasms (affecting > 7% of either sex) were pituitary adenoma (34% of males, 50% of females), benign adrenal pheochromocytoma (10% of males, 1% of females), thyroid C cell adenoma (6% of males, 8% of females), mammary fibroadenoma (3% of males, 36% of females), keratoacanthoma (11% of males, 0.6% of females), testicular interstitial cell tumor (11% of males), uterine stromal polyp (16% of females), pancreatic acinar cell adenoma (13% of males, 0.6% of females), and benign thymoma (3% of males, 8% of females). Seventeen neoplasms affecting 2 to 6.9% of either sex included adrenal cortical adenoma, thyroid follicular adenoma, pancreatic islet cell adenoma, pituitary carcinoma, mammary adenoma, mammary adenocarcinoma, fibroma, fibrosarcoma, dermal papilloma, uterine schwannoma, uterine granular cell tumor, pancreatic acinar cell carcinoma, hepatocellular adenoma, lymphoma, granular cell meningioma, renal mesenchymal tumor, and hemangiosarcoma. Remaining neoplasms occurred in fewer than 2% of animals. Mean tumor incidence did not differ significantly between our two reviews. Ratios of benign to malignant neoplasms were similar in both reviews and percentages of survival at 104 weeks were similar. Between the two reviews, greater than threefold increase in frequency of some neoplasms occurred only in males and included keratoacanthomas, pancreatic acinar cell adenomas/carcinomas, and astrocytomas. Frequencies of remaining neoplasms were within twofold or within 10% of previous frequencies. Some neoplasms diagnosed in this review but not in the previous review included cardiac schwannoma, pilomatrixoma, parathyroid adenoma, and prostatic adenoma but incidence was approximately 1% for any one tumor. Based on these reviews, Wistar rats appear to have a predilection to pituitary neoplasms and mammary fibroadenomas (females).
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PMID:Spontaneous neoplasms in control Wistar rats: a comparison of reviews. 984 5

The clinical and pathological findings of 28 cases (27 horses, 1 donkey) of equid sinonasal tumours examined at the Edinburgh Veterinary School are presented and include: seven cases of squamous cell carcinoma (SCC); five adenocarcinomas; three undifferentiated carcinomas; two adenomas; five fibro-osseous and bone tumours; and single cases of ameloblastoma, fibroma, fibrosarcoma, undifferentiated sarcoma, melanoma and lymphosarcoma. The median ages of animals affected with epithelial, and fibro-osseous/bone tumours were 14 and 4 years, respectively. Unilateral purulent or mucopurulent nasal discharge (81% of cases) and gross facial swellings (82% of cases) were the most common presenting signs with sinonasal tumours, with epistaxis recorded in just 23% of cases. Radiology and endoscopy were the most useful ancillary diagnostic techniques. The maxillary area was the most common site of tumour origin, and only three cases were definitively identified as originating in the nasal cavity. Four of the maxillary SCC lesions originated within the nasal cavities or maxillary sinuses, while two originated in the oral cavity. Fourteen of 15 carcinomas, but only two of the 13 remaining tumours, spread to other sites in the head. Only three cases of sinonasal tumour had lymph node metastases, and none had distant metastases. In the long term, surgical treatment with seven malignant tumours was unsuccessful (6 months median survival post-operatively), but was successful with four out of five benign tumours (no regrowth at a median of 4 years post-operatively).
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PMID:Equine nasal and paranasal sinus tumours: part 2: a contribution of 28 case reports. 1032 34

Testicular sarcoma appears to be a rare stromal tumor usually of indolent course with potential for distant metastases. A pure primary intratesticular fibrosarcoma in a 71-year-old male is presented. By the time the tumor became evident metastases had already occurred widely. The course was rapidly fatal. A review of the literature yielded only one case reported previously. The present case illustrates that pure fibrosarcoma occurs occasionally as a stromal tumor and may be associated with a dismal prognosis. The diagnosis of pure fibrosarcoma should be made only after extensive sampling of the testicular tumor to rule out an associated germ cell component. The differential diagnosis also includes the fibroma of gonadal stroma origin and the unclassified sex cord-stromal tumor with a predominance of spindle cells.
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PMID:Primary pure intratesticular fibrosarcoma. 1035 76

Fibrocartilaginous mesenchymoma of bone is a tumoral entity which is somewhat controversial. It has been delineated in 1984 by Dahlin and al. Fifteen cases have been reported in the literature. We report a new case which involves proximal humerus. X-ray data, microscopic findings and local recurrence indicate a low grade malignancy. Metastasis have never been reported. The main differential diagnosis are desmoplastic fibroma, fibrous dysplasia and fibrosarcoma with low grade malignancy. Treatment is surgical.
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PMID:[Fibrocartilaginous mesenchymoma of bone. A case report]. 1059 75

Patients with the inherited, bilateral form of retinoblastoma have an increased incidence of osteogenic sarcoma such that the mortality from the secondary tumor exceeds that of the initial bilateral retinoblastoma. We report a 29-year-old male survivor of bilateral retinoblastomas originally diagnosed at 8 months of age, whose treatment eventually included bilateral enucleation, bilateral orbital radiation, and systemic chemotherapy. At age 26, a tumor removed from his right maxillary sinus was diagnosed as fibroma. At age 29, he developed an inferior orbital mass that extended into the right maxillary sinus. A biopsy and comparison with the previous maxillary sinus mass revealed both lesions to be leiomyosarcoma. Both light and electron microscopy supported the diagnosis. The patient has survived treatment with orbital exenteration and maxillectomy combined with postoperative radiation to the right orbital-maxillary area. This appears to be the fourth case of leiomyosarcoma in the third decade of life in a male patient with a previously irradiated orbit after enucleation for bilateral retinoblastoma. Leiomyosarcoma appears to be another orbital tumor associated with bilateral retinoblastoma.
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PMID:Orbital leiomyosarcoma after retinoblastoma. 1092 85

Epithelioid sarcoma is a histologically distinct soft tissue sarcoma of high grade malignancy. We report a case of epithelioid sarcoma in a young man who presented with multiple nodules over the left forearm, with bony invasion and pulmonary metastases. The histological features of the dermal tumour were those of a malignant spindle cell tumour with positive cytokeratin and vimentin staining and differed from the classical epithelioid sarcoma in its absence of typical necrobiotic nodular epithelioid pattern. It was the clinical presentation and the histology of the subcutaneous nodules that led to the final diagnosis of epithelioid sarcoma. This case illustrates a predominance of spindle cell pattern in the dermal tumour of epithelioid sarcoma, which has previously been reported as fibroma-like variant of epithelioid sarcoma.
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PMID:Spindle cell variant of epithelioid sarcoma: an easily misdiagnosed tumour. 1130 41

Primary intraosseous salivary gland tumors are rare, with mucopidermoid carcinoma being the most frequent histotype. The authors present a case of adenoid cystic carcinoma, located in the mandibular incisor region, associated with pain. Endodontic treatment resulted in increased pain and progressive mandibular expansion. An apicoectomy was conducted, and an intraosseous adenoid cystic carcinoma was diagnosed at histological examination. The patient was treated by wide surgical resection, and is alive and well without recurrences or distant metastases 14 yr after the original diagnosis. The case presented herein calls attention to the preoperative clinical diagnosis of periapical lesions. Radiologically, focal sclerosing osteitis, cementoblastoma, cementifying and ossifying fibroma, periapical cemental dysplasia, complex odontoma, and calcifying epithelial odontogenic tumor should be considered in the differential diagnosis. In addition the unusual occurrence of salivary gland tumors in intraosseous location stresses the importance of systematic histological examination of any tissue sample obtained after endodontic procedures.
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PMID:Central (intraosseous) adenoid cystic carcinoma of the mandible: report of a case with periapical involvement. 1147 50

Ameloblastic fibrosarcoma is a rare malignant odontogenic tumour characterized by a benign epithelial component within a malignant fibrous stroma. Its behaviour is relatively benign, with absence of metastatic disease, and the prognosis is reported to be good. It is a paradoxical neoplasm with "sarcomatous" morphological and immunohistochemical patterns but with a favourable clinical course. We report a new case of this tumour in a mandibular ramus of a 31-years-old male patient, that was surgically excised and treated with adjuvant chemotherapy and radiotherapy. Five years later the patient is free of disease. The growth potential of ameloblastic fibrosarcoma is evaluated and compared with a related lesion, the ameloblastic fibroma. The sarcomatous mesenchymal component of ameloblastic fibrosarcoma is positive to Ki67, PCNA and p53, in front of the negativity of ameloblastic fibroma.
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PMID:Ameloblastic fibrosarcoma: report of a case. Immunohistochemical study and review of the literature. 1150 Jun 34

We report 19 Leydig cell tumors (LCTs) of the testis with adipose differentiation (n = 12) and/or spindle cell growth (n = 8) in patients 28-70 years of age; three tumors with adipose differentiation showed psammomatous calcifications, two of which also had foci of ossification. In eight tumors fat-like cells apparently derived from lipid accumulation within neoplastic Leydig cells and appeared as focal to prominent clusters in a background of vacuolated, neoplastic Leydig cells. The fat-like cells were usually immunoreactive for Leydig cell markers (inhibin-alpha, calretinin, and melan-A) but were typically strongly positive for the adipose tissue marker, S-100 protein, supporting a hybrid cell phenotype. Four tumors had fat of stromal derivation. In two of these there were intermixed mature adipocytes, but in two others only lipoblastic cells were present. These four tumors lacked vacuolated, neoplastic Leydig cells, and the fat cells in the single case studied were negative for inhibin-alpha and melan-A but positive for S-100. Three of the 12 LCTs with adipose differentiation were clinically malignant, and each had several of the established malignant features. Eight tumors with spindle cells occurred in men 34-70 years of age. Two tumors had ill-defined fascicles of spindle cells, and three showed prominent edematous to myxoid areas with spindle-shaped tumor cells. Two additional tumors had a fibroma-like spindled component that blended with islands of more plump, polygonal to spindle-shaped Leydig cells. Finally, one tumor had foci resembling an unclassified sarcoma that merged with conventional LCT; the spindle cell component in this case did not react for Leydig cell markers in contrast to the spindle cells in five of the six other cases in which immunostains were performed. Spindle cell differentiation, by itself, did not appear to have prognostic significance. Of the six patients with available follow-up, two developed metastases, but their tumors had malignant features apart from spindle cells; the remaining four patients were disease free at a mean of 3.6 years. Awareness of these unusual patterns in LCTs may prevent misinterpretation of fat admixed with neoplastic Leydig cells as evidence of extratesticular growth (a criterion for malignant LCT) may help avoid misdiagnosis of a LCT as a testicular "tumor" of the adrenogenital syndrome (which may contain fat) and may prevent misdiagnosis of a LCT with spindle cells as a sarcoma or unclassified sex cord-stromal tumor.
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PMID:Leydig cell tumors of the testis with unusual features: adipose differentiation, calcification with ossification, and spindle-shaped tumor cells. 1240 18

Lesions that involve the cortex of the tibia are fairly common in radiology practice. However, the number of diseases that involve the tibial cortex is great, and it can be difficult to arrive at a limited differential diagnosis from radiographic findings. Categorization of lesions of the tibia into those that cause cortical destruction and those that cause cortical proliferation can help narrow the broad differential diagnosis. Lesions that cause cortical destruction include nonossifying fibroma, fibrous dysplasia, osteofibrous dysplasia, aneurysmal bone cyst, giant cell tumor, eosinophilic granuloma, Ewing sarcoma, neurofibromatosis, adamantinoma, osteoblastoma, chondromyxoid fibroma, hemangioendothelioma, renal cell metastatic disease, hemangioma, and hemangiopericytoma. Lesions that cause cortical proliferation include osteochondroma, stress fracture, osteoid osteoma, periosteal osteogenic sarcoma, diaphyseal dysplasia, venous stasis, cellulitis, chronic osteomyelitis, osteopathia striatum, and melorheostosis. Conventional radiography along with clinical and pathologic data can aid in diagnosis of the wide variety of disease processes that involve the tibial cortex.
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PMID:Cortical lesions of the tibia: characteristic appearances at conventional radiography. 1253 51


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