Differential Diagnosis for Right Adnexal Septated, Cystic Lesion with Right Flank Pain
- Single Most Likely Diagnosis
- Ovarian cyst: This is the most common cause of adnexal masses, and a septated, cystic appearance is consistent with a complex ovarian cyst, which can cause flank pain due to its size and potential for torsion or rupture.
- Other Likely Diagnoses
- Ectopic pregnancy: Although less likely if the patient is not pregnant, an ectopic pregnancy can present with a similar ultrasound appearance and cause flank pain.
- Endometrioma: A cyst filled with old blood, often associated with endometriosis, which can cause chronic pelvic and flank pain.
- Tubo-ovarian abscess: An infected mass involving the fallopian tube and ovary, which can cause severe pelvic and flank pain.
- Do Not Miss Diagnoses
- Ovarian torsion: A twisted ovary can cause severe, sudden-onset flank pain and can be life-threatening if not promptly treated.
- Ruptured ovarian cyst: A ruptured cyst can cause severe pain and internal bleeding, requiring immediate medical attention.
- Malignant ovarian tumor: Although less common, a malignant tumor can present with a similar ultrasound appearance and cause flank pain.
- Rare Diagnoses
- Dermoid cyst: A type of benign ovarian tumor that can cause flank pain if it becomes large or torsioned.
- Parasitic cyst: A rare type of cyst that can form in the adnexal region, often associated with parasitic infections.
- Adnexal lymphangioma: A rare, benign tumor of the lymphatic vessels that can cause flank pain if it becomes large.