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Biomedical subjects

A Ben-Yehuda

Publications and source records attributed to A Ben-Yehuda.

At least 73 records · Page 4Linked to original sources
PubMed1992

Nodular vasculitis associated with propylthiouracil therapy.

Cutaneous vasculitis is a rare complication of propylthiouracil therapy. We describe a patient who presented with lower extremity subcutaneous nodules, hemorrhagic bullae, and necrotic ulcers during treatment with this agent. Examination of a skin biopsy specimen revealed nodular vasculitis. This type of vasculitis has not been described in association with propylthiouracil therapy before. Nodular vasculitis not associated with the drug is characterized by a chronic protracted course, whereas in the patient reported the lesions rapidly regressed when use of the drug was discontinued.

Aged↗
PubMed1991

CHox E, a chicken homeogene of the H2.0 type exhibits dorso-ventral restriction in the proliferating region of the spinal cord.

CHox E is a novel chicken homeogene that belongs to the H2.0 family of homeodomains. Its homeobox sequence is interrupted by an intron between amino acids 44 and 45. Expression of CHox E during embryogenesis is localized to the central nervous system. The anterior boundary of CHox E expression can initially be localized to rhombomere number 1, later in development this boundary reaches up to the rhombencephalic isthmus. CHox E expression in the spinal cord localizes dorso-ventrally to the dorsal half of the basal plate. CHox E expression is always restricted to the proliferating region, the ventricular zone. As the ventricular zone becomes restricted laterally, so does the CHox E expressing region. Once this region of the ventricular zone ceases to exist, CHox E specific transcripts become undetectable. The site and time of CHox E expression suggest a very early function in the differentiation of the cells derived from that region of the ventricular zone.

Amino Acid Sequence↗
PubMed1991

A chicken caudal homologue, CHox-cad, is expressed in the epiblast with posterior localization and in the early endodermal lineage.

CHox-cad is a chicken homeobox gene whose homeodomain is homologous to the Drosophila caudal and the murine Cdx1 genes. Based on sequence analysis of a 2.5 kb CHox-cad cDNA clone, we deduced that the primary translation product consists of 248 amino acids. Comparison between the cDNA and genomic clones revealed the presence of an intron within the CHox-cad homeodomain between amino acids 44 and 45. The onset of CHox-cad transcription correlates temporarily with the beginning of gastrulation. During primitive streak stages CHox-cad exhibits a caudally localized pattern of expression restricted to the epiblast and the primitive streak. At these stages, CHox-cad transcripts can also be detected in the definitive endoderm cells. Later in embryogenesis CHox-cad is expressed in the epithelial lining of the embryonic gut and yolk sac. After four days of chicken development, no CHox-cad transcripts could be detected. The early CHox-cad posterior expression in the germ layer undergoing gastrulation and its continuous expression in the early endodermal lineage raise the possibility of CHox-cad involvement in the establishment of the definitive endoderm.

Amino Acid Sequence↗
PubMed1991

Native valve Staphylococcus epidermidis endocarditis: report of seven cases and review of the literature.

This report describes seven patients from three university hospitals whose native valve infective endocarditis was caused by Staphylococcus epidermidis. The literature on endocarditis caused by S. epidermidis is also reviewed and the clinical features of patients with native valve endocarditis due to this organism are compared with those of patients from a general series of infective endocarditis cases. Compared with infective endocarditis caused by other organisms, S. epidermidis endocarditis tends to occur more frequently in male patients. Patients with S. epidermidis endocarditis exhibit fewer embolic complications and skin manifestations. The frequency of congestive heart failure is lower in this group. The relative indolent course and apparent rarity of native valve S. epidermidis endocarditis necessitate a high index of suspicion for early diagnosis.

Aged↗
PubMed1990

[Acute reversible renal failure in acute hepatitis A].

A 22-year-old woman with acute reversible renal failure complicating acute hepatitis A is presented. Usually in such cases the prognosis is bad, but this patient was treated medically without dialysis and recovered.

Acute Disease↗
PubMed1990

Syncytial variant of nodular sclerosing Hodgkin's disease. A new clinicopathologic entity.

The clinicopathologic and histopathologic features of an unusual morphologic variant of nodular sclerosing Hodgkin's Disease (HD) termed the syncytial variant has been reported recently. We report eight new cases with this unique morphology, identified by reviewing the histopathology of 58 patients with nodular sclerosing HD treated in our institute between 1982 and 1988. The clinicopathologic and histopathologic data of these cases are reported and we emphasize this new entity and the difficulties encountered in the morphologic diagnosis. All of the eight patients had a difficult initial clinical course, and were in a clinically advanced stage of the disease at the time of diagnosis. We cite a statistical comparison of the clinical features of the different forms of nodular sclerosing HD.

Adolescent↗
PubMed1990

Atypical presentation of Pneumocystis carinii pneumonia.

Pneumocystis carinii is a common cause of pneumonia in the immunosuppressed patient. Its radiological findings are usually homogeneous, diffuse and bilateral. We present a 27-year-old woman with non-Hodgkin's lymphoma presenting with unilateral right lung parenchymal infiltrates due to Pneumocystis carinii. In the immunosuppressed host, pneumonia limited to one lung should not preclude the diagnostic possibility of Pneumocystis carinii infection.

Adult↗
PubMed1989

Plasmacytoma of the breast. Unusual initial presentation of myeloma: report of two cases and review of the literature.

Two patients who presented initially with breast masses proven to be plasmacytomas, are described. In both cases the breast masses led to the diagnosis of multiple myeloma, which was retrospectively already present at the time of the breast biopsy. One patient with IgG lambda-type myeloma developed plasma cell leukemia and amyloidosis and failed to respond to radiochemotherapy. The second patient was in complete remission, four years after therapy, but has subsequently relapsed and died. All cases of breast plasmacytoma, described in the medical literatures are reviewed, and guidelines for future therapy are suggested.

Breast Neoplasms↗
PubMed1989

Familial gingival fibromatosis; no correlation with HLA-antigen. A family study.

Familial gingival fibromatosis is generally reported to be inherited as an autosomal dominant trait. We investigated 2 families with few siblings affected with gingival fibromatosis. No linkage between HLA antigen and the phenomenon was found. These results support the idea of the autosomal dominant nature of familial gingival fibromatosis.

Female↗