Cases reported "Cysts"

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1/104. arachnoid cyst of the middle fossa with paradoxical changes of the bony structures.

    Two patients with an arachnoid cyst of the middle fossa showed paradoxical changes of the adjoining bony structures of the skull. There was a diminution of the middle fossa and hyperplasia of the sphenoid sinus (pneumosinus dilatans) as well as a marked bulging of the squamous part of the temporal bone. In one case in which scinticisternography was performed, communication between the cyst and the subarachnoidal space was proven as well as an extremely slow cerebrospinal fluid circulation in the cyst. The pathogenesis of the cyst is discussed, based upon the structural changes of the skull, the angiographic findings and the locally disturbed cerebrospinal fluid circulation. The primary disturbance seems to be a temporal lobe agenesis.
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2/104. hiv-1 (p24)-positive multinucleated giant cells in HIV-associated lymphoepithelial lesion of the parotid gland. A report of two cases.

    BACKGROUND: Cystic benign lymphoepithelial lesion (CBLL) is a well-recognized parotid disorder the diagnosis of which can be made on the basis of clinical findings, human immunodeficiency virus (HIV) testing, image studies and fine needle aspiration (FNA). Most aspirations are cystic, and the lesion can be recognized if the triad of foamy macrophages, lymphoid and epithelial (squamous) cells is observed. CASES: The authors recently observed FNA cytologic features of two HIV-associated cases that exhibited numerous multinucleated giant cells (MGCs) but failed to show the epithelial component. A subsequent surgical resection was performed in one patient. Similarly to what has been described for nasopharyngeal (adenoid and tonsil) lymphoid tissue of HIV-positive patients, intense immunoexpression of S-100 and p24 (hiv-1) protein was present in MGC. CONCLUSION: The diagnosis of HIV-associated CBLL should always be considered if a parotid cystic lesion presents with numerous MGCs. Immunocytochemical detection of p24 (hiv-1) protein in MGC becomes a very useful diagnostic aid and extends to parotid CBLL many of those pathogenic features of hiv-1 infection already noted in other hiv-1-infected, lymphoid oropharyngeal lesions.
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ranking = 38.059762651654
keywords = macrophage
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3/104. Meniscal cysts causing bone erosion: retrospective analysis of seven cases.

    Meniscal cysts of the knee are common and well evaluated by magnetic resonance (MR) imaging, a method that also reveals the frequently associated meniscal tear. diagnosis of meniscal cysts with routine radiography is difficult, although bone erosions are reported as a very rare manifestation of such cysts. Our retrospective study describes seven patients in whom meniscal cysts were associated with adjacent erosion of bone.
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keywords = bone
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4/104. Temporocele: CT findings and management.

    The temporocele, a rare case of extra-mastoid pneumatization is discussed. It presented as a swelling over the mastoid in a 16-year-old female and the diagnosis was made by computed tomography (CT) scan. It was treated by obliteration by covering the sieve-like mastoid with bone dust and a large piece of temporalis fascia as well as ventilating the middle ear.
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5/104. Fine needle aspiration cytology of foreign bodies presenting as cystic abdominal masses. A report of three cases.

    BACKGROUND: Foreign body material (gauze sponges) presented as cystic abdominal masses and were confused with malignant tumors. CASES: Two females and one male presented with abdominal masses. They had undergone laparotomy 5-12 years earlier. Clinically the masses were diagnosed as benign or malignant cystic lesions. Fine needle aspiration revealed necrotic material, hemosiderin-laden macrophages, foreign body giant cells, cholesterol crystals and many fragments of birefringent material. The possibility of malignancy was ruled out. Cut sections of the excised cystic lesions revealed gauze sponges surrounded by a thick, fibrotic wall. CONCLUSION: This report underscores the usefulness of fine needle aspiration in ruling out malignancy.
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keywords = macrophage
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6/104. Pneumocele of the maxillary sinus. A second case report.

    The term pneumocele refers to an expansile bone destructive air containing cyst-like lesion involving the sinus cavity proper, presumably due to obstruction of the major sinus ostium. It differs from pneumoceles described previously that have all been air pockets beyond a paranasal air sinus due to an abnormal fistulous communication, rather than expansion of the sinus cavity itself. In adding this second case to the literature we believe that this rare lesion may be encountered from time to time, and should be considered when an expanded maxillary antrum is found to contain air rather than fluid or soft tissue content.
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7/104. Hemophilic pseudotumor. diagnosis, treatment, and complications.

    patients with hemophilia are living longer as a result of improved therapeutic measures. Associated with this longevity is the increased occurrence of complications affecting the osseous system. One of the more serious bone complications is the hemophilic pseudotumor or hemophilic cyst. We studied its diagnosis, treatment, and complications, and report a case of an early hemophilic cyst occurring in a new location, the proximal part of the left clavicle. The increased incidence of this complication should alert the clinician to the possibility of these lesions appearing in previously unreported sites and demonstrating atypical roentgenographic features. Early recognition and treatment is essential if optimal therapeutic results are to be obtained.
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8/104. Relapsing exophiala jeanselmei phaeohyphomycosis in a lung-transplant patient.

    Dematiaceous fungi are a cause of a variety of human infections, including phaeohyphomycosis, that may affect patients with solid organ or bone marrow transplants. exophiala jeanselmei, the most common cause of the pheomycotic cyst/subcutaneous phaeohyphomycosis in the united states, has been shown to cause disease in transplant recipients. We report a lung-transplant patient with relapsing and invasive E. jeanselmei phaeohyphomycosis, who previously had a pheomycotic cyst excised and treated with oral fluconazole. The patient was subsequently treated with re-excision and an 8-month course of oral itraconazole without relapse as to date.
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keywords = bone
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9/104. Encapsulated cystic papillary variant of medullary carcinoma of thyroid gland.

    Papillary variant of medullary carcinoma of the thyroid (MCT) is an unusual histologic pattern with some diagnostic difficulties. A case of encapsulated papillary variant of MCT with extensive cystic appearance is reported. A euthyroid, 43-yr-old woman with bone pain was incidentally found to have a 4.0-cm solitary, cold nodule on her left thyroid lobe. Histopathologic examination revealed an encapsulated tumor composed of a large cystic cavity with small papillary projections. The papillae were lined by multiple layers of neoplastic cells with small and regular nuclei containing condensed chromatin and lacking the characteristic "ground glass" appearance of the papillary carcinoma of the thyroid gland. Immunohistochemical studies revealed specific cytoplasmic staining of the tumor cells for calcitonin, chromogranin a, neuron-specific enolase, carcinoembryogenic antigen, and cytokeratin. Specific staining for thyroglobulin was not observed in any neoplastic cell. Staining with congo red disclosed amyloid deposits within the stroma. The case was diagnosed as papillary variant of MCT. Medullary thyroid carcinomas may show a papillary pattern with a totally cystic gross appearance. Thyroid carcinomas should be classified according to their major immunoreactivity pattern rather than their morphologic pattern. Immunohistochemical and/or histochemical studies should be performed in all thyroid tumors that show unusual histologic features.
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keywords = bone
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10/104. Cystic paracervical mass as an unusual sequela of graft-versus-host disease. A case report.

    BACKGROUND: bone marrow transplantation is used in the treatment of a variety of malignancies. One common sequela is graft-versus-host disease (GvHD.) CASE: A case of vaginal GvHD in a postmenopausal woman manifested as a 2-cm, cystic, paracervical mass. The patient was followed with consecutive pelvic ultrasounds and pelvic examinations until 27 months after transplantation, when the mass increased in size to 4 x 3 cm. Exploratory laparotomy with total abdominal hysterectomy revealed a 3 x 3-cm phlegmon within the proximal part of the vagina. Presumably, this resulted from vaginal GvHD, causing a midvaginal stricture with obstruction of cervical/uterine effluent. CONCLUSION: An awareness of the gynecologic manifestations of GvHD is critical for clinicians caring for women undergoing bone marrow transplantation.
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