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Updated: Apr 19, 2026

Culture and Imaging of Ex Vivo Organotypic Pseudomyxoma Peritonei Tumor Slices from Resected Human Tumor Specimens
Published on: December 9, 2022
Pseudomixoma peritonei, a rare entity difficult to diagnose and treat - case report
Abstract:
The authors present the case of a 56 year-old patient diagnosed with pseudomyxoma peritonei, 4 years after being subjected to a left adnexectomy for ovarian cystadenoma. The intra-parietal insemination of the mucinous cells enabled the development,at this level, of a gelatinous mass that raised problems of differential diagnosis with irreducible incisional hernia. In what regards the preoperative signs of clinical and paraclinical diagnosis we consider them obscure and nonspecific. The abdominal computed tomography revealed the presence of a massive intraperitoneal collection, but given the rarity of this pathology the initial diagnosis was made in the course of the exploratory laparotomy. Intraoperatively it became necessary to perform the omentectomy and total hysterectomy with contralateral adnexectomy and appendectomy. The histopathological examination confirmed the diagnosis. Using cisplatin associated with aggressive surgical cytoreduction this case of pseudomixoma had a good long-term evolution. The diagnosis was a challenge, and the nonspecific slow evolution of the disease led to difficult differential diagnostic.
Insights
This case study highlights pseudomyxoma peritonei, a rare condition diagnosed 4 years post-ovarian surgery. Aggressive treatment involving surgery and cisplatin led to a good long-term outcome.
Area of Science:
- Gynecologic Oncology
- Surgical Pathology
Background:
- Pseudomyxoma peritonei (PMP) is a rare condition characterized by mucinous ascites.
- Ovarian cystadenoma is a potential precursor, with mucinous cell seeding leading to PMP.
Observation:
- A 56-year-old patient developed a gelatinous mass 4 years after adnexectomy for ovarian cystadenoma.
- Preoperative diagnosis was challenging due to obscure and nonspecific clinical signs.
- Abdominal CT showed a massive intraperitoneal collection, but diagnosis was confirmed intraoperatively.
Findings:
- Histopathology confirmed pseudomyxoma peritonei.
- Surgical cytoreduction, including omentectomy, hysterectomy, and adnexectomy, was performed.
- Treatment with cisplatin combined with aggressive surgery resulted in good long-term evolution.
Implications:
- This case underscores the diagnostic challenges of PMP, particularly its slow and nonspecific evolution.
- Early recognition and aggressive multimodal treatment are crucial for favorable outcomes in PMP.
- Rarity of PMP necessitates high clinical suspicion in patients with a history of mucinous ovarian tumors.

