In the patient reported here, a solid tumor lying between the vagina and the rectum was detected using various imaging techniques (ultrasonography and MRI), and S100 protein was found in the tumor cells. Thus, a schwannoma was the final diagnosis. This is a slow-growing neoplasm, and its early detection is difficult.

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A phyllodes tumor appeared at the site of a resected fibrocystic disease focus. Administration of danazol resulted in temporary regression, but the tumor resumed growth. Relative hyperestrogenism also continued to increase in spite of continued long-term administration of danazol. After 12 months a simple mastectomy was performed. Most of the resected mass consisted of the phyllodes tumor, but it also contained fibrocystic disease.