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Biomedical subjects

E Waldo

Publications and source records attributed to E Waldo.

10 recordsLinked to original sources
PubMed1999

Atypical cutaneous lymphoproliferative disorder in patients with HIV infection.

BACKGROUND: An inflammatory pruritic eruption which is characterized histologically by CD8+, atypical lymphocytes has been described in human immunodeficiency virus (HIV)-infected patients. This disorder has been described as "pseudo-Sezary" or a "cutaneous T cell lymphoma (CTCL)-simulant", however, as these patients do not resemble CTCL clinically, and the relationship between this entity and CTCL is unclear, a more descriptive term is "atypical cutaneous lymphoproliferative disorder" (ACLD). The purpose of this study is to categorize the clinical, histologic, and immunophenotypic features of 16 HIV-infected patients with this skin disorder seen at the New York Department of Veterans Affairs Medical Center. METHODS: A retrospective chart review was conducted on 16 HIV-infected patients with a histologic diagnosis of an atypical cutaneous lymphoproliferative infiltrate on skin biopsy. Skin biopsies were reviewed, and histologic features noted. Immunophenotyping was performed on 14 out of 16 samples; electron microscopy was performed on samples from five patients. Clinical manifestations, disease course, medication history, and response to treatment were noted. RESULTS: The patients presented with a pruritic, persistent, generalized, papular eruption. Pigment changes, including hyperpigmentation and hypopigmentation were common. Histologically, lesional biopsies were characterized by a superficial and deep polymorphous infiltrate with atypical lymphocytes which were CD8+ predominant, Ki-1 negative, and occasionally CD7 antigen depleted. Sezary-like cells were present in the infiltrate in four out of five patients by electron microscopy. None of the patients has systemic manifestations of lymphoma; however, one of the 16 patients eventually developed frank CTCL. CONCLUSIONS: HIV-infected patients can present with a pruritic, widespread disorder, often with pigment changes characterized by an atypical cutaneous lymphocytic infiltrate. This clinicopathologic disorder is a rare, reactive inflammatory condition which generally occurs in late stage HIV infection and rarely progresses to frank lymphoma.

Acquired Immunodeficiency Syndrome↗
PubMed1994

Chronic actinic dermatitis. An immunohistochemical study of its T-cell antigenic profile, with comparison to cutaneous T-cell lymphoma.

Chronic actinic dermatitis (CAD) describes a persistent photosensitivity disorder in the absence of continued exposure to photosensitizers; it is characterized by a T-cell infiltrate within the epidermis and dermis. The purpose of this study was to characterize the T-cell infiltrate better immunohistochemically. Serial cryostat sections of fresh-frozen punch biopsy specimens of skin were analyzed in 11 patients with CAD and 3 patients with erythrodermic cutaneous T-cell lymphoma (CTCL). Monoclonal antibodies against the pan T-cell, pan B-cell, and T-cell subsets and the T cell-receptor (TCR) antigens were used. CD8-positive (T-suppressor-cytotoxic) cells were predominant in the epidermis of CAD, while CD4-positive (T-helper) cells were predominant in the epidermis and dermis of CTCL. CDw29-positive (T-memory) cells were predominant in all cases. The number of BF1 (beta-chain constant region of the TCR)-positive cells approximated the number of CD3-positive cells in all CAD cases but was significantly lower than the number of CD3-positive cells in two of three cases of CTCL. There was no clustering or preferential staining with any of the beta-chain variable-region antibodies in any of the specimens. These results indicate that CAD has a characteristic immunophenotype distinct from that of most cases of CTCL and that discordance between BF1 and CD3 expressions did not occur in the CAD cases.

Antigens, Differentiation, T-Lymphocyte↗
PubMed1994

A large, pigmented nail bed lesion in a child.

An unusual case of an extremely large junctional nevus of the nail bed with histological atypia in a 6-year-old Japanese child is described. The evaluation and management of subungual pigmented lesions is reviewed.

Child↗
PubMed1991

Distinguishing benign and malignant melanocytic lesions with the AgNOR method.

A silver staining technique has recently been devised to aid in the differentiation between benign and malignant melanocytic lesions. This study showed a statistically significant difference between the staining of silver-nucleolar organizer regions (AgNORs) in melanocytic nevi and that of AgNORs in malignant melanomas.

Diagnosis, Differential↗
PubMed1983

Histiocytoid hemangioma with features of angiolymphoid hyperplasia and Kaposi's sarcoma. A study by light microscopy, electron microscopy, and immunologic techniques.

We examined by light and electron microscopy 99 vascular lesions removed on 17 occasions over a 2-year period from a 55-year-old black man. The lesions all showed histologic features of a vascular neoplasm composed of enlarged "histiocytoid" endothelial cells and overlapping features of angiolymphoid hyperplasia with eosinophilia and Kaposi's sarcoma. An apparently unique feature was early loss of melanin from the overlying epidermis and a mononuclear inflammatory-cell infiltrate. The patient also had an abnormal immunologic state very similar to that seen in homosexuals with Kaposi's sarcoma.

Endothelium↗
PubMed1983

Bovine collagen implant: histologic chronology in pig dermis.

The histologic fate of an injectable form of type I bovine dermal collagen (Zyderm Collagen Implant, ZCI) in the pig dermis and subcutaneous tissue has been studied. Biopsies were taken sequentially and analyzed by hematoxylin and eosin (H&E) and Weigert's stain, by birefringence, by direct immunofluorescence (using a highly specific rabbit anti-Zyderm antibody), and by electron microscopy. The implant material was found to stimulate a host response resulting in implant degradation and replacement by newly generated host collagen.

Animals↗
PubMed1983

Favorable prognosis for malignant melanomas associated with acquired melanocytic nevi.

In a clinicohistopathologic study of 557 patients with primary cutaneous malignant melanoma, there were fewer metastases and/or deaths from melanoma when histologic evidence of a coexisting acquired melanocytic nevus was found. A total of 130 patients with melanocytic nevus and 427 cases of melanoma without histologic evidence of a nevus (denovo) were studied. Clinical follow-up evaluation for evidence of metastases and/or death was obtained. Only ten of the patients (7.7%) with nevus-associated melanoma had metastases and/or death v 78 (18.3%) with de novo melanoma. When stratified by lesion thickness, the logrank test for survival revealed a statistically significant difference between the two groups. An overall favorable outcome seen in patients with malignant melanomas associated with acquired melanocytic nevi was found, therefore, to be independent of lesion thickness as well as six other variables reported to be related to the biologic behavior of malignant melanoma. Thus, the presence of nevus cells in a specimen of malignant melanoma portends a better prognosis and may have important implications in the biology of this neoplasm.

Female↗