Figure 13b. Spindle cell lipoma in the posterior neck in a 55-year-old man with a long history of a slowly growing mass. (a) Axial contrast-enhanced CT scan shows a complex heterogeneous soft-tissue mass with a small lipomatous component medially (arrowhead) and a markedly enhancing area laterally (*). (b) Photograph of the axially sectioned gross specimen reveals identical features with a yellow adipose component (F) and a red hemorrhagic area (H). (c) Photomicrograph (original magnification, x175; H-E stain) through the more vascular area demonstrates pseudoangiomatoid spaces (A), adult fat cells (arrows), and a single collagenized area (arrowheads).