A 48-year-old woman underwent surgery for a lesion seen on ultrasound and interpreted as a uterine myoma. The surgery revealed multiple nodules that had seeded on the omentum, peritoneum, and ovaries. The macroscopic interpretation was either metastasis or tuberculosis. The biopsy showed noncaseating granulomas, and a diagnosis of peritoneal sarcoidosis was reported. The AFB (acid fast bacillus) and Löwenstein-Jensen culture were negative. She was treated with methylprednisolone for 1 year for pulmonary sarcoidosis progression, with a resulting decrease in her DLCO (diffusing lung capacity for carbon monoxide). Computed tomography showed only a slight decrease in the multiple nodules and cysts. She is currently symptom-free.