A case of left inguinal endometriosis.
A left inguinal mass initially suspected as malignant metastasis was diagnosed as endometriosis involving a lymph node upon surgical excision.
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The paper reports a rare case of left inguinal endometriosis presenting as a 4 cm hard mass that was clinically and by imaging (ultrasound/CT) interpreted as malignant lymph node metastasis. A 43-year-old woman underwent fine-needle aspiration labeled as a “lymph node puncture,” which showed inflammatory cells and necrotic material with epithelial clusters of low atypia, leading to a cytologic diagnosis of class V consistent with adenocarcinoma metastasis; after no primary lesion was found, excisional biopsy was performed. Histology revealed endometriosis involving left inguinal soft tissue with fibrosis and entrapment of the lymph node, and the case notes a prior left inguinal hernia operation at age 2. The paper’s main limitation is that, as a single case report, it cannot determine generalizable diagnostic performance beyond highlighting a cytology-related pitfall. This paper is centrally about endometriosis — it describes a case of inguinal endometriosis mimicking malignant lymph node metastasis and discusses diagnostic caveats in cytology.
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References (7)
- CERVICAL AND VAGINAL ENDOMETRIOSIS via openalex
- Endometriosis: Etiology and Pathophysiology of Infertility via openalex
- Histologic study of endometriosis and examination of lymphatic drainage in and from the uterus via openalex
- Inguinal endometriosis: pathogenetic and clinical implications. via openalex
- Peritoneal endometriosis due to the menstrual dissemination of endometrial tissue into the peritoneal cavity via openalex
- The relation of endometriosis to menstrual characteristics, smoking, and exercise via openalex
- The Relation of Endometriosis to Menstrual Characteristics, Smoking, and Exercise via openalex
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- last seen: 2026-06-10T17:14:06.276822+00:00