![Aveolar soft part sarcoma. A 25-year-old woman presented with an 18-month history of an enlarging thigh mass. At the time of removal of this mass, miltiple bilateral pulmonary metatases were present; other sites of spread were absent. The diagnosis of alveolar soft part sarcoma was confirmed by the elctron microscopic identification of unique membrane-bound, intracellular rhomboid crystals seen in longitudinal (A) and cross-sectional (B) views. (Original magnification [A] × 171,000 and [B] × 251,000.) (Courtesy of Ann M. Dvorak, MD, Department of Pathology, Beth Israel Hospital, Harvard Medical School, 330 Brookline Ave, Boston, MA 02215.)](https://ash.silverchair-cdn.com/ash/content_public/journal/blood/89/12/10.1182_blood.v89.12.4371/3/bl_0062f1.jpeg?Expires=1743352156&Signature=cDzLt5gFtmq0fc3DCR28ELf2UFAaS~Xr63-VPTrVc8KGahgNrnspbHisusYRcDKInHyo7WOkb3VpBxGOB3t1Cfsz1GkL9pQInwZE~26Ughvy~JMbrAjMOTGC4ZWPB~GBlwWIHLruXH04cWvN~xDK0eWG~DACTRp48IAe4ffStPou8aQdKinpFx1PP3uxfgKg9mbKyp9gctqocnxBgWzTaG-ATYrHOBdWaiWaN0lugmfSO918-CudVOgHWi8wINgvwBDRXWB9FzNgpL5laTZ2~ZG6EDvk7P4nhX4P0mLDDfpF6yaKOSgalsz224YxHCIKsnJGsZKNl2keXOdf4aA8VQ__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Aveolar soft part sarcoma. A 25-year-old woman presented with an 18-month history of an enlarging thigh mass. At the time of removal of this mass, miltiple bilateral pulmonary metatases were present; other sites of spread were absent. The diagnosis of alveolar soft part sarcoma was confirmed by the elctron microscopic identification of unique membrane-bound, intracellular rhomboid crystals seen in longitudinal (A) and cross-sectional (B) views. (Original magnification [A] × 171,000 and [B] × 251,000.) (Courtesy of Ann M. Dvorak, MD, Department of Pathology, Beth Israel Hospital, Harvard Medical School, 330 Brookline Ave, Boston, MA 02215.)
