Differential Diagnosis for Unchanged Right Ovarian Cyst
- Single most likely diagnosis
- Simple ovarian cyst: The stability of the cyst over 3 months, despite its thickened periphery, suggests a benign nature. Simple ovarian cysts are common and can have a thickened wall, especially if they are longstanding.
- Other Likely diagnoses
- Hemorrhagic ovarian cyst: Although the cyst appears unchanged, a hemorrhagic cyst could present with a thickened periphery due to organization of the hemorrhage. The stability over time might suggest a resolving or chronic hemorrhagic cyst.
- Corpus luteum cyst: Given the initial consideration of a collapsing follicle, a corpus luteum cyst is a plausible diagnosis. These cysts can persist and may have a thickened wall.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Ovarian tumor (e.g., epithelial, germ cell, or sex cord-stromal tumor): Although less likely given the stability and appearance, any ovarian mass has the potential to be malignant. Missing a diagnosis of ovarian cancer could have significant consequences.
- Dermoid cyst (mature cystic teratoma) with malignant transformation: While dermoid cysts are typically benign, there is a small risk of malignant transformation. A dermoid cyst could present with a thickened periphery and stability over time.
- Rare diagnoses
- Ovarian lymphangioma: A rare, benign tumor that could present as a cystic lesion with a thickened wall.
- Krukenberg tumor: Metastatic disease to the ovaries, typically from a gastrointestinal primary, which could present as a cystic lesion with thickened walls, although this would be uncommon for a single, stable lesion.