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

The authors report a unique case of intracerebellar fibroma; the tumor was well circumscribed and was treated by complete excision.
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PMID:Intracerebellar "fibroma". Case report. 114 91

A polyp of the size of a small bean was discovered incidentally on the superior pole of the right tonsil of a 29-year-old man. Morphologically it bore a considerable resemblance to the immature infantile variant of the sebaceous-gland nevus, the Naevus epitheliomatosus sebaceus Wolters, but its top was mature. The polyp is viewed as a congenital dysontogenic tumor which, owing to its fibromatous basis, lack of hair, and its immature and mature sebaceous glands, may be informally classified as a "missing link" between the haired pharyngeal polyp and the pure pharyngeal fibroma.
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PMID:Congenital stalked fibromatous polyp of the superior pole of the tonsil containing hairless sebaceous glands. 118 Aug 14

A case history of a boy with an acute abdomen due to torsion of a pedunculated mesenteric fibroma is presented. A review of the literature shows that only a relatively small number of mesenteric fibromata have been reported. In these cases the tumor was described as growing between the two leaves of the mesentery. The symptoms these tumors gave usually were due to the size of the tumor and compression of adjacent organs. The present case is unusual because of the pedunculated nature of the fibroma and its presentation as an acute abdomen.
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PMID:Acute abdomen due to torsion of a pedunculated mesenteric fibroma. 118 8

The problems of restorative surgery for inborn eyelid-alterations are indicated here with examples. The following experiences result. 1. Inborn eyelid colobomas without disfigurement of the inner canthus are in general readily correctable. 2. Inborn eyelid colobomas with a disfigured inner canthus and atresia of the canaliculi hardly ever permit the production of a cosmetically satisfactory inner canthus, and never permit a functionally satisfactory one. The use of lacoductorhinostomy, according to L. Jones, is problematic here. 3. The correction of inborn eyelid colobomas in the case of Goldenhar's syndrome is difficult because, due to additional dermoids and fibromas, irregular excisions become necessary. Thus, the lid margin becomes significantly deformed. A considerable temporal displacement of the skin cannot be avoided. 4. Any plastic correction of an inborn, genuine eyelid tumor is difficult, if the important structures of the eyelid--especially the tarsus and levator muscles--are only fragmentarily developed. In the case of the large, soft fibroma of the upper eyelid in neurofibromatosis, only a static eyelid in middle position can be accomplished. 5. Very often, motility problems arise in this connection. Both in Goldenhar's disease and in Recklinghausen's disease, primary dysplasis of the rectus externus muscle occurs.
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PMID:[Atypical oculoplastic surgery in children (author's transl)]. 119 35

The histogenesis of pseudotumors of dense connective tissue has been studied. These lesions may be classified as mucoid (synovial cyst and periungueal myxoma), collagenous (desmoid tumor, desmoid fibroblastoma and fibromatosis colli), elastic (elastofibroma dorsi), cellular (fibroblastic: fibromatosis, fasciitis and myositis; histiocytic: giant-cell tumor of tendon sheath, fibrous histiocytoma and atypical fibroxanthoma), metaplastic (ossifying fasciitis, ossifying myositis and juvenile chondroid fibroma) and hamartomatous nature (fibrous hamartoma). It must be emphasized that these lesions show a variable and polymorphouse cellular composition and then can simulate sarcoma.
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PMID:[Pseudo-tumoral lesions of dense conjuntival tissue. Attempt at pathogenic interpretation]. 123 71

A recurrent tumor in a young male demonstrates the progression of an ameloblastic fibroma to an ameloblastic sarcoma. Chemotherapy with Actinomycin D, Vincristine, and Cytoxan produced a complete response without evidence of recurrence 4 years after initiation of chemotherapy. The patient developed an aggressive malignant melanoma 1 year after all chemotherapy was discontinued.
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PMID:Ameloblastic sarcoma: pathogenesis and treatment with chemotherapy. 126 Jun 84

A total of 93 tumors of the epidermis, its appendages, and dermis were observed in 1,433 (717 males, 716 females) rats employed in oncogenicity studies over a 2-yr period. Mammary gland neoplasms will be reported separately. Fifty-seven (61.3%) were epithelial with 49 in males and 8 in females. Keratoacanthoma was the most frequent epithelial neoplasm in males (22) followed by squamous cell carcinoma (11) and papilloma (5). Sebaceous gland neoplasms seen in males (5) included both adenomas (3) and carcinomas (2). In males, there were also 3 trichoepitheliomas, 1 pilomatricoma, 1 basal cell tumor, and 1 malignant melanoma. Of the 8 epithelial neoplasms in females, there were 3 squamous cell carcinomas, 2 keratoacanthomas, and 1 each basal cell tumor, malignant melanoma, and trichoepithelioma. There were 21 mesenchymal neoplasms in males and 15 in females. The most frequent neoplasm was fibroma (7 males, 8 females) followed by lipoma (7 males, 4 females) and fibrosarcoma (4 males, 3 females). One male had a liposarcoma and 2 males each had hemangioma. The total neoplasm incidence of 70/717 (9.8%) in males and 23/716 (3.2%) in females showed that skin neoplasms were 3 time more common in males than in females. Epithelial neoplasms of the skin were 6 times more common in males than in females. Males were more than twice as likely to have epithelial rather than mesenchymal skin neoplasms whereas the reverse was seen in females.
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PMID:Spontaneous skin neoplasms in aged Sprague-Dawley rats. 129 64

Schwannoma or neurilemmoma and neurofibroma are two tumors of the peripheral nerves originating in the nerve sheaths. Schwannoma account for just over 1% of benign tumors reported in the oral cavity. The tongue is unanimously considered the most frequent site at this level; however, the tip is the least affected part of the organ. The case of schwannoma reported here is the third observed with a lingual localization in 18 years by the Division of Maxillo-Facial Surgery of The Odontostomatological Clinic of the University of Turin. The case is of interest due the rarity of this pathology and the presence of non-significant symptoms for a presumed initial diagnosis. CASE REPORT. A 21-year-old woman was referred to our attention following the appearance two years earlier of a slowly growing swelling on the tip of the tongue. The patient complained of the fastidious presence, disturbance to mastication and phonation and occasional paresthesia of the tip of the tongue. The small mass, which was clearly evident on examination, was covered with normal mucosa. On palpation it had a hard-elastic consistency; it was slightly painful, smooth and partial mobile on surrounding levels. The patient underwent the surgical removal of the neoplasia under anesthesia. The mass was well capsulated and a good cleavage plane was easily found. The neoformation was yellowy grey, oval bean-shaped, measuring 1.9 x 1.3 x 1.1 cm. The histological diagnosis, confirmed by immunohistochemical tests, was benign Antoni's, type A schwannoma. The postoperative period was good an there was no recidivation during the course of a one-year follow-up. DISCUSSION AND CONCLUSIONS. Benign schwannoma, which are relatively rare in the oral cavity, represent a pathology which are often not taken into account during clinical practice. Symptoms which take the form of slight hypoesthesia and vague paresthesia may lead to the suspected diagnosis of this type of neoplasia. The final diagnosis is always made after a definitive histological examination. Differential diagnosis must be made in relation to malignant tumors (on the basis of anamnestic data relating to the speed of growth and clinical appearance of the neoplasia) and, above all, in relation to numerous benign neoformations based on epithelial and connective tissues (lipoma, fibroma, leiomyoma and adenoma). Treatment is always surgical: in the case reported here, the exeresis of the lesion also allowed its histological characterization (excisional biopsy). Surgery was conservative and did not require local or locoregional prophylactic measures. After the final histological diagnosis of schwannoma, the patient underwent a thorough general objective examination to check the presence of other characteristic signs of Von Recklinghausen's syndrome, have a probability of malignant degeneration ranging between 5 and 16%. Isolated schwannoma hardly ever become malignant and in general, if exeresis is complete, no recidivation occurs after surgery.
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PMID:[Schwannoma located in the tongue. A clinical case report]. 130 93

A 31-year-old woman, with primary infertility associated with cervico-vaginal defect, presented with intermittent breathlessness often correlated by the patient with menses, cough and chest pain. The symptoms had lasted for 6 months, and were attributed to a pleurisy, which was confirmed at roentgenology and treated by frequent thoracentesis, evacuating in all over 15 liters of fluid. Several aetiologies were excluded, such as: viral, TB, L.E., neoplasia, liver disfunction. A gynecological ultrasonography finally diagnosed a solid extensive ovarian tumour. Right oophorectomy has completely stopped pleural effusion relapse. We consider this case representative for the importance of a serious consideration of Meigs' syndrome in any recurrent pleurisy. We also believe our case to support the hypothesis of a hormone implication in Meigs' syndrome cause, as the symptoms correlated with menses, and especially as the morphopathological diagnosis was ovarian fibroma with myxoid areas, which could be incriminated for the patient's primary infertility, but it was not properly investigated.
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PMID:Meigs' syndrome. A case report and review of literature. 130 26

The role of the epidermal growth factor homologue in malignant rabbit fibroma virus (MRV) pathogenicity was investigated by constructing a viral growth factor deletion mutant (MRV-GF-). Since MRV is a recombinant virus with a myxoma virus background but possesses some terminal sequences derived from Shope fibroma virus, the growth factor gene in MRV is in fact identical to Shope fibroma growth factor (SFGF). Although no significant differences were detected in the in vitro characteristics of MRV and MRV-GF-, a pronounced attenuation was observed after inoculation of the test rabbits with MRV-GF-. Animals infected with wild-type MRV uniformly developed a fatal syndrome involving disseminated tumors accompanied by purulent conjunctivitis and rhinitis. In contrast, although MRV-GF- recipients developed similar initial signs of the MRV disease syndrome, 75% of these animals completely recovered from the viral and secondary bacterial infections and became immune to subsequent MRV challenge. Tumors in MRV-GF- recipients displayed earlier and more prominent inflammatory reactions than their wild-type MRV counterparts and contained fewer proliferating cells. Squamous metaplasia and hyperplasia of target epithelia were less pronounced in MRV-GF- than in MRV infection. We conclude that SFGF is a major virulence factor in MRV infection and is responsible for at least some of the cellular proliferation observed at tumor sites. In addition, the diminished ability of MRV-GF- to cause hyperplasia in nasal and conjunctival epithelia may decrease the extent of gram negative bacterial overgrowth as compared to the parental virus and hence contribute to the dramatic reduction in the lethality of MRV-GF- infection.
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PMID:Deletion of the growth factor gene related to EGF and TGF alpha reduces virulence of malignant rabbit fibroma virus. 130 74


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