Cases reported "Sarcoma, Kaposi"

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1/883. Human herpes-virus 8 seropositive patient with skin and graft Kaposi's sarcoma after lung transplantation.

    Kaposi's sarcoma (KS) has been reported after solid organ transplantation mostly in recipients of renal, liver, heart, and bone allografts. We describe the first case of a patient with lung transplantation who developed KS of the skin, but also of the lung graft. The tumors were localized to places of previous trauma, implying the involvement of a Koebner phenomenon. Moreover, a polymerase chain reaction assay revealed the presence of dna sequences of herpesvirus 8 (HHV-8) on tissue of the cutaneous KS. Serological tests showed HHV-8 seronegativity of the graft donor and HHV-8 seropositivity of the patient before lung transplantation suggesting that the latter was already infected before the surgery and that immunosuppression resulted in the development of KS. This case report raises the question of the prevalence of HHV-8 in candidates for transplantation and organ donors, and of the value of an antiviral prophylaxis to lower the risk of KS. ( info)

2/883. Bone involvement in a case of Kaposi sarcoma.

    BACKGROUND: Extracutaneous involvement is rare in the classical form of Kaposi sarcoma (KS). observation: We report a case of bone involvement revealed by bone pain. Magnetic resonance (MR) images demonstrated the local invasion of bone from cutaneous lesions. Bone biopsy confirmed bone involvement. The patient was treated with vindesine. Bone pain progressively disappeared. CONCLUSION: Bone involvement has rarely been reported in classical KS though 4.5% of the patients were affected when it was systematically sought. Treatment of symptomatic lesions requires radiotherapy or chemotherapy. ( info)

3/883. Laryngeal pathology in the acquired immunodeficiency syndrome: diagnostic and therapeutic dilemmas.

    The acquired immunodeficiency syndrome has produced a growing population of patients who, because of their associated immune system compromise, are prone to opportunistic infections and neoplastic diseases. The larynx, with its relatively inaccessible yet critical anatomic location, is a site in which these processes can produce clinical dilemmas, with respect to diagnosis as well as to therapy. By presenting 4 cases involving unusual laryngeal problems in patients infected with the human immunodeficiency virus (hiv), we emphasize these inherent diagnostic and therapeutic problems. Otolaryngologists must be familiar with the many diagnostic possibilities and therapeutic alternatives when hiv-infected patients present with laryngeal complaints. ( info)

4/883. Epstein-Barr virus-associated intravascular lymphomatosis within Kaposi's sarcoma in an AIDS patient.

    Intravascular lymphomatosis (IL) is an unusual neoplasm characterized by multifocal proliferation of lymphoma cells exclusively within the blood vessels. We report here a patient with acquired immunodeficiency syndrome (AIDS) and disseminated Kaposi's sarcoma. A 233-bp amplification product of HHV-8 was detected in the dna extracted from specimens of Kaposi's sarcoma at different sites by polymerase chain reaction (PCR). At autopsy, the vessels within the Kaposi's sarcoma were dilated and filled with atypical large mononuclear cells. No such feature was seen in the vessels of non-Kaposi's sarcomatous regions. Immunohistochemically, the spindle cells of Kaposi's sarcoma were positive for CD31 (endothelial cell marker). The intravascular tumor cells were positive for CD45 (leukocyte common antigen) but negative for others, including chloroacetate esterase, CD45-RO (UCHL-1, Pan-T), CD3, CD43, CD20 (L26, Pan-B), CD30 (Ki-1), immunoglobulin heavy chains and light chains, CD56 (natural killer cell antigen), and CD31. Monoclonal rearrangement of immunoglobulin heavy chain gene was detected in the dna extracts from fresh tissue of Kaposi's sarcoma by PCR, which indicated that the lymphoma cells within the Kaposi's sarcoma were of monoclonal B cell origin. in situ hybridization revealed that EBER-1 transcripts were present in the lymphoma cells of IL but not in the spindle cells of Kaposi's sarcoma. To the authors' best knowledge, this is the first instance of IL in an AIDS patient with direct evidence of EBV association. ( info)

5/883. Human herpesvirus 8 (HHV-8) in familial Kaposi's sarcoma.

    Human herpesvirus 8 (HHV-8) has been detected in various epidemiological forms of Kaposi's sarcoma (KS). Since familial KS cases are exceedingly rare and the occurrence of familial KS in siblings has thought to depend rather on genetic factors than on a viral factor, familial KS has not been investigated for the presence of HHV-8. To investigate whether HHV-8 is present also in this rare form of KS, we examined tumor biopsies of 2 siblings with familial KS for the presence of HHV-8 specific dna sequences by a nested PCR protocol. HHV-8 dna sequences could be detected in KS specimens of both patients. sequence analysis revealed an identical dna sequence of HHV-8 in KS tissue of both siblings, but the sequence in our cases differs in one base pair at position 67 from the previously published HHV-8 KS330Bam fragment. The findings indicate that besides the yet poorly defined genetical factors involved in the pathogenesis of KS, HHV-8 may act as a cofactor also in familial KS. In addition, our data demonstrate that HHV-8 is found in all epidemiological forms of KS, including the rarely occurring familial KS. Familial KS may act as a further model to study the interaction of an oncogenic virus with genetic host factors in the context of a neoplastic disorder. ( info)

6/883. An unusual localization and presentation of Kaposi's sarcoma.

    A case of Kaposi sarcoma was diagnosed by skin biopsy in a 71-year-old woman with severe destructive arthropathy of the right shoulder, where all other diagnostic techniques were not conclusive. ( info)

7/883. Gastro-intestinal Kaposi's sarcoma, with special reference to the appendix.

    Kaposi's sarcoma (KS) of the gastro-intestinal tract is a common disease in the AIDS setting, although it is often asymptomatic. In this paper we wish to highlight the occurrence of gastro-intestinal KS with appendiceal involvement. Two of the patients presented with features of acute appendicitis, and KS of the appendix was not suspected at the time of surgery. In the remaining patient KS of the appendix was part of generalised gastro-intestinal involvement. It is important to remember that KS can cause appendicitis by producing a submucosal nodule that abuts into the lumen and thereby causes obstruction. KS of the gastro-intestinal tract may therefore masquerade as 'simple' appendicitis, or indeed remain asymptomatic. ( info)

8/883. Complete histological regression of Kaposi's sarcoma following treatment with protease inhibitors despite persistence of HHV-8 in lesions.

    There is no current curative treatment for hiv-related Kaposi's sarcoma. The identification of human herpesvirus-8 as a possible aetiological agent suggests potential efficacy of anti-viral agents. We report here on the complete histological remission of Kaposi's sarcoma following treatment with protease inhibitors, even in patients with limited virological response and persistence of HHV-8. ( info)

9/883. Relationship of HHV8 replication and Kaposi's sarcoma after solid organ transplantation.

    HHV8 dna sequences have recently been isolated from all types of Kaposi's sarcomas, and its association in the etiopathogenesis of this tumor has been established. However, little is known about the regulation of HHV8 replication in immunocompromised patients seropositive for this virus, and its impact on the development of Kaposi's sarcoma (KS). Through the study of a heart transplant patient who developed KS and in whom peripheral blood lymphocytes (PBLs) had been prospectively collected before and after transplantation, we have investigated the pathogenesis of HHV8. Our results indicate that (i) HHV8 can reactivate soon after transplantation; (ii) viral replication, as determined by quantification of HHV8 dna load of PBLs, increases significantly after transplantation; and (iii) increased HHV8 dna levels in PBLs are associated with the development of KS. ( info)

10/883. Kaposi's sarcoma in bone: a case report with unusual radiographic findings and an abnormal radioisotope scan.

    The authors present a case report of Kaposi's sarcoma involving the bones of the forearm, wrist, and hand. Typical features of rarefaction, osteoporosis, cysts, and cortical erosions were present. Rarely seen changes of a bubbly expansion of the lesions and periosteal reaction were also present. This is the first radioisotope bone scan reported in Kaposi's sarcoma to the author's knowledge. The literature about osseous manifestations of Kaposi's sarcoma is reviewed. ( info)
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