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Related to hydropic degeneration: fatty change, vacuolar degeneration
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The main abnormality in this case appeared to be that of severe and extensive hydropic degeneration in a leiomyoma which resulted in a prominent multilocular cystic structure that more closely resembled a serous cystic ovarian neoplasm on gross examination.
7) Finally, the leiomyoma has to show perinodular hydropic degeneration, another rare form of stromal change in leiomyoma characterized by accumulation of edematous fluid in the connective tissue subdividing the tumor into numerous, small, compact smooth muscle nodules.
The classic appearance is a "sawtooth" pattern to the rete, with a hydropic degeneration of the basal layer (figures 1 and 2).