A Rare Case of Relapsed Pediatric Acute Promyelocytic Leukemia with Skin Involvement by Myeloid Sarcoma.

BACKGROUND Acute promyelocytic leukemia (APL) is a very rare leukemia in children. Extramedullary involvement by APL has been reported in between 3-5% of cases, mainly associated with cases of relapse. A rare case of relapse of APL in a 9-year-old child is presented with skin involvement with myeloid sarcoma.

Blastic Plasmacytoid Dendritic Cell Neoplasm with Pulmonary Involvement and Atypical Skin Lesion.

BACKGROUND Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is a rare hematodermic malignancy neoplasm with highly aggressive course and poor prognosis. This disease typically presents with cutaneous involvement as the first manifestation, with subsequent or simultaneous spread to bone marrow and peripheral blood.  CASE REPORT Here, we report the case of a 51-year-old woman who presented a violaceus skin lesion on the lateral region of the right thigh, weight loss, fever, and lymphadenopathies.