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Query: UMLS:C0027651 (tumor)
 685,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Cerebellopontine angle lipoma has been previously described in 21 patients and is frequently unresectable. An intracanalicular lipomatous hamartoma in a 60-year-old male is presented. MRI enabled a correct preoperative diagnosis to be made. Complete surgical excision, without major neurologic deficit was achieved. A review of the literature reveals that the tumor is frequently infiltrative, especially when vascular elements are prominent. The histologic characteristics and the hamartomatous nature of the lesion are discussed.
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PMID:Cerebellopontine angle lipomatous hamartoma of nerve: case report. 178 8

We conducted a study of 90 patients with soft tissue tumor in their arms or legs, in order to determine the usefulness of scintigraphy with gallium-67 citrate as a diagnostic means. All patients had adequate scan images, and tumor tissues had been histologically confirmed by surgical resection. The subjects consisted of 19 patients with malignant tumors, 55 patients with benign tumors, and 16 patients with other disorders in which soft tissue tumor-like lesions occurred. When the activity of the tumor was more than the activity of the normal region of the contralateral extremity, it was estimated to be positive. The positive rate was found in 78% (15/19) of patients with malignant tumors, in 25% (14/55) of patients with benign tumors and in 31% (5/16) of patients with other disorders. Classified by diseases, high positive rates were observed in liposarcoma, leiomyosarcoma, malignant lymphoma, neurinoma, extra-abdominal desmoid and sarcoidosis. Out of 7 patients in which the activity of the tumor was equal to, or higher than that of the liver, 6 patients had malignant tumors and one patient was diagnosed as having an abscess. It seemed possible to distinguish between liposarcoma and lipoma by means of a gallium-67 scan. Furthermore, the gallium-67 scan was useful in detecting lesions of sarcoidosis as well as in evaluating the response to treatment.
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PMID:Gallium-67 citrate scintigraphy in the pre-operative evaluation of soft tissue tumors of the extremities. 179 66

To compare conventional and fat suppression MR imaging in their ability to detect head and neck lesions, we prospectively studied 17 patients with head and neck tumors and one normal volunteer. Five patients had benign tumors (one mixed cell tumor, one hemangioma, one lipoma, and two plexiform neurofibromas), 10 had malignant tumors (six squamous cell carcinomas, two minor salivary gland carcinomas, one lymphoma, and one malignant fibrous histiocytoma), and two had nonspecific lymphadenopathy. All subjects were studied with standard spin-echo T1- and T2-weighted images (T2-weighted imaging was done with and without fat suppression technique). In addition, T1-weighted images with contrast enhancement and fat suppression were obtained in nine patients. A four-point grading system was used for comparison of the conventional and fat suppression images. Grades ranged from 0 (unsatisfactory, the lesion cannot be seen) to 3 (excellent, the lesion and its margins can be seen clearly with sharp contrast from surrounding normal tissue). We found that postcontrast fat suppression T1-weighted images and fat suppression T2-weighted images were most useful; these sequences obtained an average score close to grade 3 (2.77 and 2.85, respectively). On the other hand, the conventional T2-weighted images had an average score of about 2 (1.82) and the conventional T1-weighted image had a score of about 1 (1.33). Fat suppression T2-weighted sequences generally were superior in cases of lymphadenopathies. Postcontrast T1-weighted images were most useful in a case of plexiform neurofibroma, owing to their fibrous component and lower proton density.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Improved detection and delineation of head and neck lesions with fat suppression spin-echo MR imaging. 184 94

Sixty-one children (below 12 years) with midline dermal inclusions of the cranium and spine were operated on at the Red Cross War Memorial Children's Hospital between 1969-1990. The bregmatic area was the most common position for superficial cysts (33). Eight children had sinuses or cysts near the external occipital protuberance, 2 had isolated fourth ventricular cysts and 1 had a cyst in the quadrigeminal plate cistern. Fifteen children had spinal dermal inclusions, 13 of these were in the lumbosacral area, there was 1 sinus in the cervical spine and another in the midthoracic area attached to an intramedullary cyst. Two children had frontal sinuses, one of which was connected to an interhemispheric dermoid cyst and a lipoma of the corpus callosum. A midline swelling or sinus was the most common clinical presentation. Four out of 15 spinal inclusions and 1/11 occipital sinuses had a meningitic history. Five of 11 of the posterior fossa inclusions had raised intracranial pressure and signs suggestive of cerebellar tumor or abscess. Not one of the 33 bregmatic lesions had any connection to the central nervous system. MRI has proved useful in diagnosing both dermal sinuses and cysts, but CT scanning was our standard investigation. Plain x-ray revealed bony abnormalities in only 60% of our patients with spinal sinuses. We feel that all dermal sinuses or cysts in the midline should be surgically explored after CT or MRI scanning. Lesions mistaken for bregmatic cysts have included hemangiomas (4), hamartomas (2), an encephalocele through the anterior fontanelle (1) and lipomas (2).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Midline dermal sinuses and cysts and their relationship to the central nervous system. 185 13

Analysis of CT data on 213 patients with soft tissue and trunk tumors has shown that a majority of malignant and benign tumors have a similar picture (except lipoma). Features of the contours of a tumor and its inner structure do not permit the assessment of its nature. The only significant differential-diagnostic sign of malignant soft tissue tumors is destruction of an adjacent bone, noted in 17.6%. The majority of malignant and benign soft tissue tumors (70.9%) on CT scans look like a single node; recurrent tumors look multinodular (78.2%). Verification of soft tissue tumors, revealed by CT, should be done using morphological methods.
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PMID:[Computerized tomography in the diagnosis of soft tissue neoplasms of the extremities and trunk]. 187 67

The incidence of brain tumors was studied in Yamaguchi prefecture of about 1,600,000 population. All of the brain tumor patients admitted to the neurosurgical hospitals in Yamaguchi prefecture were registered. Cases of osteoma, lipoma, scalp tumor and spinal tumor were excluded. From 1986 through 1989, 726 cases were registered. 135 recurrent cases were included. Therefore first-diagnosed primary brain tumors were selected to calculate the true incidence. The number of cases of primary brain tumor was 478 and showed female preponderance (male/female: 207/271). The incidence of primary brain tumor was 7.5/100,000/year (male/female: 6.8/8. 1). No difference was present between the incidence in cities and that in rural districts. Percentages of representative tumors were 28.2% for glioma, 32.8% for meningioma, 13.0% for pituitary adenoma and 10.7% for neurinoma. Age-adjusted incidence was 2.1/100,000/year for glioma and 2.1/100,000/year for meningioma. The incidence of glioma was lower and that of meningioma was higher in Yamaguchi prefecture than those in other reports. Compared with the Brain Tumor Registry of Japan (1969-1983), the percentage of meningioma cases was large in Yamaguchi prefecture. This difference owed partly to the increased number of population over age of 40's in Yamaguchi prefecture. The peak of age distribution was present in age of 50's in Yamaguchi prefecture and in age of 30's and 40's in Brain Tumor Registry of Japan. The peak of age distribution shifted to older ages in Yamaguchi and the difference was conspicuous in age of 60's. This peak consisted of mainly cases of meningioma and partly those of glioma.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Brain tumors in Yamaguchi Prefecture--incidence through 4 years]. 188 75

A 71-year-old male patient was referred to our department for further examination for right retroperitoneal tumor. Exploration was done through a flank approach and the tumor with right adrenal gland was removed. A pleomorphic lipoma was diagnosed histopathologically. There have been 8 reported cases of pleomorphic lipoma including our present case in Japan and we discuss the pathogenesis and treatment of this rare disease.
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PMID:[A case of retroperitoneal pleomorphic lipoma]. 189 94

A tumor mass covered with scrotum-like skin on its tip was found on the perineal region of 3-year-old boy since his birth. The mass was diagnosed as congenital lipoma, which was resected, because of its gradual enlargement. Histopathological findings of the tumor indicated perineal lipoma, and the scrotum-like portion was diagnosed as an accessory scrotum. In the Japanese literature, 7 congenital perineal lipomas (6 males, 1 female) have been reported and all male cases except 1 case (no description about scrotum) were accompanied with an accessory scrotum. We conclude that there may be a close relationship between congenital perineal lipoma and accessory scrotum.
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PMID:[Congenital perineal lipoma with accessory scrotum: a case report]. 189 16

We present a rare case of an intrinsic lipoma of the left false vocal cord in a 62-year-old man. The tumor was a manifestation of generalized lipomatosis. Successful endolaryngeal removal was accomplished.
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PMID:Laryngeal lipoma. 189 90

Lipoma of the parotid gland is a rather rare tumor (2-3% of all tumors of the gland). Comparative imaging of a case of parotid lipoma by computed tomography, sonography and magnetic resonance is presented.
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PMID:[Lipoma of the parotid gland. Apropos of a case]. 189 52


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