Benign Smooth Muscle Soft Tissue Tumors. Low magnification view of myolipoma. The tumour is characterised by lobules of adult-type (mature) adipose tissue intimately admixed with sheets and septa of smooth muscle. Both components lack cellular atypia (H&E stain; 2× magnification). Myolipoma affecting the erector spinae: a case report in a child. Parratt MT, Gokaraju K, Spiegelberg BG, Miles J, Cannon SR, Briggs TW - Case reports in medicine (2009) Not Altered. CC.