case_images: PMC11094210_01
case_images: FDG PET/CT showing multiple osteolytic lesions, some lesions accompanied with the formation of soft tissue masses.
case_images: fonc-14-1364266-g001.jpg
case_images: PMC11094210_01_fonc-14-1364266-g001.jpg
case_images: f1
case_images: S1 vertebral levels, bilateral proximal humeri, bilateral iliac bones, and femoral neck. Some lesions were accompanied with the formation of soft tissue masses with abnormal concentration of radioactive uptake ( Figure 1 ), raising suspicion of metastatic malignancies.
case_images: Cell bodies vary in size, with some notably larger. Cytoplasmic content ranges from scant to abundant, appearing grayish-blue upon staining. Some cells exhibit cytoplasmic extensions, containing fine pinkish granules. Nuclei display both regular and irregular shapes, with uniformly fine chromatin. Variability in nucleolar prominence is observed.
case_images: fonc-14-1364266-g002.jpg
case_images: PMC11094210_01_fonc-14-1364266-g002.jpg
case_images: f2
case_images: Bone marrow aspiration reported on the 21st day indicated that primitive blood cells accounted for 29% ( Figure 2 ).
case_images: Flowcytometry dot plot showing two populations of phenotypically aberrant myeloid progenitor cells. Blue dots: 6.95% Blasts; Red dots: 2.64% Blasts.
case_images: fonc-14-1364266-g003.jpg
case_images: PMC11094210_01_fonc-14-1364266-g003.jpg
case_images: f3
case_images: Immunophenotyping reported on the 23rd day revealed two populations of phenotypically aberrant myeloid progenitor cells within the nucleated cells ( Table 3 ,  Figure 3 ).