PRAME is expressed at low levels in normal testes and highly in solid tumor cells and hematological malignancies. The purpose of this study was to investigate PRAME expression levels in children with acute leukemia with real-time PCR analysis. Seventeen children with newly diagnosed or relapsed acute leukemia (11 ALL, 4 AML, 1 acute myeloblastic leukemia secondary to MDS, 1 ALL at relapse) and a control group of seven children were studied. Overexpression of PRAME was found in 52.9% (3 AML, 6 ALL) of the patients studied. No important correlation between PRAME expression and the patients' prognosis was observed. The above findings indicate that PRAME expression in acute leukemia does not seem to be of prognostic significance, whereas it might represent a candidate marker for the monitoring of minimal residual disease.
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PRAME Immunostaining in BAP-1-Inactivated Melanocytic Tumors: Unraveling Diagnostic Complexity and Exploring Germline Mutation Associations.
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Pathology Department, Virgen Macarena University Hospital, Madrid, Spain.
Background: Cutaneous melanocytic tumors with BAP-1 inactivation (BIMTs), linked to mutations in the BAP-1 gene, present diagnostic challenges due to their morphological similarities with other melanocytic lesions. The search for reliable diagnostic markers, including PRAME, holds potential to significantly improve the accuracy of differential diagnoses.
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The Diagnostic Utility of PRAME in Primary Cutaneous Dedifferentiated and Transdifferentiated Melanomas.
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Department of Anatomical Pathology, Dorevitch Pathology, Heidelberg, Victoria, Australia.
Melanomas show a wide spectrum of clinical, morphological, immunohistochemical, and molecular features, which can impact treatment and prognosis. Dedifferentiated and transdifferentiated melanomas (DTM) are defined as melanomas which have lost conventional melanocytic morphologic and immunohistochemical features, showing sarcomatous morphology and/or immunohistochemical staining of other cell lineages, and as such, can be mistaken for other entities such as collision tumors and undifferentiated spindle cell tumors. In this series, we highlight the utility of preferentially expressed antigen in melanomas (PRAME) in diagnosing undifferentiated/dedifferentiated melanomas.
View Article and Find Full Text PDFCombined immunohistochemistry of PRAME and p16 in the differentiation of melanocytic neoplasms, with a detailed focus on acral lesions.
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Department of Pathology, Hospital for Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, 210042, China.
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