Peritoneal Carcinomatosis: When Everything Is Not What It Seems

Area of Science:

• Oncology
• Pathology

Background:

• Malignant peritoneal mesothelioma (MPM) is a rare neoplasm with high morbidity and mortality.
• Limited research exists due to its rarity.

Observation:

• A 73-year-old woman presented with constitutional syndrome, abdominal pain, and ascites.
• Imaging suggested peritoneal carcinomatosis, but the primary tumor remained unidentified.
• The patient's condition worsened during hospitalization.

Findings:

• Peritoneal implant biopsy diagnosed malignant peritoneal mesothelioma (MPM) via histopathology.
• The primary tumor could not be identified despite extensive investigation.

Implications:

• This case highlights the importance of considering MPM in differential diagnoses.
• Prompt identification of the primary tumor is essential for potentially curative treatment of localized MPM.