1/21. Progressive multifocal leukoencephalopathy and gliomas in a HIV-negative patient.A case of progressive multifocal leukoencephalopathy (PML) is reported, detected at autopsy of a 30-year-old patient. The clinical picture was characterized by a progressive course of mental deterioration and ingravescent neurological symptoms. The patient was HIV-negative. He died of bronchopneumonia, after a clinical course of 13 months. autopsy disclosed pulmonary tuberculosis with involvement of regional lymph nodes. In the brain, besides numerous PML-foci of varying age and structure, a pleomorphic astrocytoma was found in the white matter of the right parietal lobe. In the brain stem glial proliferation resembling diffuse gliomatosis was also present. in situ hybridization revealed Papova-virus (JCV) in oligoglial nuclei, but not in neoplastic astrocytes. This is the third report on the concomitant occurrence of PML and glioma in man.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
2/21. Human papillomavirus type 16 in a homosexual man. association with perianal carcinoma in situ and condyloma acuminatum.BACKGROUND--The association of anal carcinoma with human papillomavirus (HPV) type 16 infection is well documented. Anal carcinoma is also frequently associated with a history of anogenital condylomata. More than 90% of anogenital condylomata contain HPV type 6 or 11. It is rare for a condylomatous lesion to contain HPV 16. We report the unusual case of a homosexual man, testing positively for human immunodeficiency virus, with carcinoma in situ evolving within perianal condylomata infected with HPV 16. OBSERVATIONS--Microscopic examination of tissue specimens from ulcerated verrucous lesions on the perianal mucosa revealed changes of classic condylomata acuminata with contiguous focal squamous cell carcinoma in situ. Testing for HPV dna by in situ hybridization identified HPV 16 in both the condylomatous and carcinoma in situ areas. CONCLUSIONS--The association of HPV 16-infected condylomata and adjacent carcinoma in situ implies that cutaneous genital condylomata may progress to high-grade lesions. Given that homosexual men are at high risk for perianal carcinomas, HPV typing of perianal condylomata specimens may help identify immunocompromised patients who are at risk for the development of carcinomas.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
3/21. Hairy leukoplakia with involvement of the buccal mucosa.Oral hairy leukoplakia occurs mainly on the tongue of human immunodeficiency virus (HIV)-infected persons. An HIV-infected patient with hairy leukoplakia involving the tongue and buccal mucosa was studied by light and electron microscopic methods, in situ hybridization, and polymerase chain reaction. Our findings indicate that hairy leukoplakia may involve the buccal mucosa and should be considered in the differential diagnosis of white oral lesions in HIV-positive patients. Epstein-Barr virus particles were found in the epithelial cells of both buccal and tongue mucosa.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
4/21. KSHV/HHV8-associated lymphoma simulating anaplastic large cell lymphoma.We report a unique, previously undescribed case of KSHV/HHV8-associated lymphoma in a 49-year-old HIV-seropositive patient. The cervical lymph node-based lymphoma displayed distinctive characteristic features of preferential sinusoidal infiltrate and anaplastic cellular morphology, closely resembling classic anaplastic large cell lymphoma of the WHO classification both histologically and immunophenotypically. paraffin immunohistochemical study showed that the lymphoma cells were strongly positive for KSHV/HHV8 latency-associated nuclear antigen, and PCR analysis confirmed the presence of KSHV/HHV8 infection. Epstein-Barr virus in situ hybridization was negative. Molecular study clearly demonstrated B-cell lineage with immunoglobulin heavy and kappa light chain gene rearrangements. This case may add to the spectrum of the heterogeneous category of KSHV/HHV8-associated B-cell lymphomas.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
5/21. IgA nephritis in HIV-positive patients: a new HIV-associated nephropathy?Four HIV-positive patients were shown to have IgA-associated nephritis on biopsy, including one with anaphylactoid purpura. Three were homosexuals, while the fourth acquired the infection from his mother. All had hematuria, a variable degree of proteinuria and renal disease with a benign course. Serologic studies showed elevated levels of IgA as well as IgA immune complexes and rheumatoid factor. IgA antibodies to multiple hiv antigens were detected by Western blot. Pathologic studies showed tubuloreticular inclusions in endothelial cells and nuclear bodies in interstitial cells in all cases. hiv antigens were not detected in kidney biopsies by monoclonal antibodies nor was HIV viral genome demonstrated by in situ hybridization. The possibility that this represents a unique type of IgA-associated HIV nephropathy is discussed.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
6/21. condylomata acuminata of the neovagina in a HIV-seropositive male-to-female transsexual.We present an unusual case of condylomata acuminata arising in the transplanted skin of a neovagina in a male-to-female transsexual. The neovagina had been constructed using a penile and a scrotal skin flap. Resection of the larger condylomata was performed; then all visible lesions were ablated by electrovaporization. Microsocpic examination and dna hybridization revealed condylomata acuminata due to human papillomavirus type 16, 31, and 33 infection.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
7/21. EBV positive primary cutaneous CD30 large T-cell lymphoma in a heart transplanted patient: case report.Most post-transplant lymphoproliferative disorders (PTLDs) are of B-cell origin, whereas T-cell lymphomas rarely occur. We detail the clinicopathological features of the first case of Epstein-Barr virus (EBV)-associated primary cutaneous CD30 anaplastic large cell lymphoma (ALCL) in the setting of heart transplant. A 71-year-old patient, 111 months after transplant, presented with multiple cutaneous lesions on the left thigh; histological and immunohistochemical examinations led to diagnosis of T-cell CD30 ALCL. in situ hybridization demonstrated the presence of EBV-positive tumour cells. The patient received radiotherapy, but he relapsed at the same cutaneous site with loco-regional nodal spread. Chemotherapy was administered resulting in complete remission; four years later the patient is alive and well. Our findings indicate that primary cutaneous EBV CD30 ALCLs should be included within the T-cell PTLDs spectrum; further studies are required to confirm whether they may be also considered, in transplantation settings, a distinct lymphoma subset with relatively favourable outcome.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
8/21. A case of symptomatic primary HIV infection.A 30-year-old homosexual Japanese man had fourteen days of fever, malaise, appetite loss, sore throat, and four days of diarrhea and slightly congested eyes before he developed a skin eruption. He presented with measles-like exanthems on his face, trunk, and extremities. Deep red enanthems were seen on his left buccal mucosa opposite the premolar teeth, and whitish enanthems were seen on the buccal and gingival mucosa. HIV rna was detected at the high concentration of 5.8 x 10(6) copies /ml in his serum. cerebrospinal fluid examination revealed aseptic meningitis with 5,488 copies /ml of HIV rna. Anti-HIV 1 antibodies against Gp160 and p24 tested by Western blot assay showed seroconversion on day 5 of his admission, seven days after he developed the skin eruptions. The fever lasted for three weeks from the initial onset, and the skin eruptions lasted for twelve days. Histopathologically, a mononuclear cell infiltration was seen mainly in the upper dermis surrounding small vessels and sweat ducts, with CD8 cytotoxic T lymphocytes predominant. Additionally, CD1a putative interdigitating dendritic cells had also infiltrated perivascularly, and were surrounded by CD8 and CD4 T cells. in situ hybridization study failed to detect HIV products in skin biopsy specimens. Our findings suggested that CD8 T cells and their interaction with CD1a dendritic cells in the skin may be important in inducing skin manifestations in acute hiv infections.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
9/21. Recurrent oral condylomata acuminata and hairy leukoplakia: an early sign of myelodysplastic syndrome in an HIV-seronegative patient.Oral hairy leukoplakia (OHL) has been observed in all risk groups seropositive for HIV infection. Recently, this lesion has also been described in HIV-seronegative patients with immunosuppression of iatrogenic origin. We report on a hiv-1 and hiv-2 seronegative, heterosexual man affected by refractory anemia with ringed sideroblasts (myelodysplastic syndrome), who developed recurrent oral condylomata acuminata and OHL as an early clinical manifestation. The diagnosis of OHL was confirmed by identifying Epstein-Barr viral particles by electron microscopy and by in situ dna hybridization. HIV infection was ruled out using polymerase chain reaction and testing for hiv-1 and hiv-2 antibodies.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
10/21. epidermodysplasia verruciformis-associated papillomavirus infection complicating human immunodeficiency virus disease.Three males infected with the human immunodeficiency virus (HIV) were noted to have extensive flat warts of the face and/or body. In two there were also pityriasis versicolor-like lesions. Biopsies showed foamy, basophilic, distended cytoplasm in granular layer keratinocytes, characteristic of the human papillomavirus types seen in epidermodysplasia verruciformis. dna hybridization techniques demonstrated the presence of HPV-type 8 in one patient and HPV 5 and 8 in another. patients with immune suppression due to HIV infection may demonstrate the clinical features of epidermodysplasia verruciformis with the same potentially oncogenic HPV types.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
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