Slide 210.Angiomyolipoma, Kidney

A. Brief Descriptions

  1. Most common in renal site but extra-renal site can occur.

  2. Most are benign.

  3. Necrosis and hemorrhage may be present but rare mitoses.

B. Gross Findings


C. Micro Findings

  1. Angio-component is seen.

  2. Smooth muscle component is present.

  3. Mature adipose tissue is present.

D. Others:

  1. Mature component of vascular, smooth muscle, and adipose tissue.

E. Reference

  1. Robbins Pathologic Basis of Disease, 6th ed.  p.991




【 Fig. 210-1 (2X)】Relatively well circumscribed lesion.




【 Fig. 210-2 (20X)】Mature adipocytes are seen here.




【 Fig. 210-3 (2X)】Vascular component is seen in this view.




【 Fig. 210-4 (10X)】Vascular component is seen here.




【 Fig. 210-5 (20X)】Typical cigar-shaped smooth muscle cells.




【 Fig. 210-6 (10X)】Some smooth muscle cells component exhibit epithelioid  pattern.



【 Fig. 210-7 (10X)】Mature adipose tissue without atypia.