Differential Diagnosis of Pelvic Mass with Mottled Calcification

Primary Differential Diagnoses

The American College of Radiology recommends that the presence of macroscopic fat with or without calcification and/or Rokitansky nodule is diagnostic of a dermoid on CT imaging 1
Mature cystic teratomas represent the most common benign ovarian neoplasm in premenopausal women 2
The American College of Radiology suggests that fat-fluid levels and calcified teeth or bone fragments may be visible on imaging 1
Ovarian cystadenomas can develop calcifications, particularly in postmenopausal women, according to Praxis Medical Insights 3
Ovarian fibroma/fibrothecoma can also present with calcification 1
Calcified endometrioma is a rare consideration 4

The American College of Radiology states that transvaginal ultrasound with color Doppler is the essential first-line imaging modality for all suspected adnexal masses 1, 3
The use of color Doppler to evaluate vascularity of any solid components is recommended by the American College of Radiology 2, 5
Plain radiographs can characterize calcification pattern and rule out bone involvement, as suggested by the American College of Radiology 6
MRI pelvis with and without IV contrast is the next step for indeterminate lesions or when ultrasound is suboptimal, according to the American College of Radiology 1, 3

The American College of Radiology recommends that if imaging suggests benign dermoid, premenopausal women should have surgical consultation for elective cystectomy or oophorectomy based on size, symptoms, and fertility desires 1
Postmenopausal women with suspected dermoid should consider surgical removal due to small malignant transformation risk, as stated by Praxis Medical Insights 3
Asymptomatic small dermoids may be observed with serial ultrasound, according to Praxis Medical Insights 3
If indeterminate features are present, MRI with IV contrast should be obtained for definitive characterization, as recommended by the American College of Radiology 1, 3
If suspicious for malignancy, features such as solid components with vascularity, thick irregular septations, papillary projections, ascites, and peritoneal nodules should prompt immediate referral to a gynecologic oncologist 2, 3, 5
CT abdomen and pelvis with IV contrast should be performed for staging in suspected malignancy, as recommended by the American College of Radiology 2, 5

The American College of Radiology warns against biopsying a suspected adnexal mass before imaging characterization and oncology consultation, due to the risk of tumor spillage if malignant 4
The Annals of Oncology advises against assuming all calcified masses are benign, as serous cystadenocarcinoma can calcify 4
The American College of Radiology recommends avoiding CT as initial imaging due to suboptimal soft tissue delineation in the adnexal region compared to ultrasound and MRI 1
Praxis Medical Insights suggests maintaining a higher suspicion for malignancy in postmenopausal women, even with simple-appearing lesions 3
The Annals of Oncology emphasizes the importance of multidisciplinary discussion before any intervention, particularly for complex or suspicious masses requiring coordination between radiology, gynecology, and oncology 4