Seltener Fall einer tiefinfiltrierenden Endometriose des Spatium rektovaginale mit Übergang in einen Müllerschen Mischtumor (sog. Karzinosarkom)
This paper reports an exceptionally rare case of deep infiltrating rectovaginal endometriosis transitioning into a Müllerian mixed tumor, also known as a carcinosarcoma.
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This paper reports a rare case of a 52-year-old woman with chronic deep infiltrating endometriosis in the rectovaginal space, presenting with lower abdominal pain, severe dyschezia, and symptoms of subileus, with prior incomplete endometriosis surgery. Imaging suggested extensive deep infiltrating disease with suspected rectal stenosing infiltration up to the submucosa over about 5 cm, and intraoperative frozen section confirmed malignancy, prompting hysterectomy and bilateral adnexectomy with partial vaginal and deep anterior rectal resection, followed by adjuvant chemotherapy and local percutaneous radiotherapy for R1 resection. Histopathology showed a malignant Müllerian mixed tumor (carcinosarcoma) arising on the background of pre-existing endometriosis with rectal infiltration, and follow-up showed no evidence of recurrence. This paper is centrally about endometriosis — it describes malignant transformation of deep infiltrating endometriosis in the rectovaginal space into a carcinosarcoma with rectal involvement.
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