A corpus luteal cyst masquerading as a lymph node mass on PET/CT scan in a pregnant woman with an anterior mediastinal lymphomatous mass.
A 26-year-old woman presented with a history of dyspnea. The patient declined a pregnancy test before undergoing a noncontrast CT scan of the chest that showed an anterior mediastinal mass that was F-18 FDG avid on a subsequent PET/CT. Additionally, PET/CT demonstrated focal uptake in the right adnexal region. Surgical excision of the anterior mediastinal mass revealed Hodgkin lymphoma. A contrast-enhanced CT scan of the chest, abdomen, and pelvis after surgery showed no residual tumor in the mediastinum. An enhancing 1.2-cm round lesion was noted in the right adnexal region. An ultrasound examination revealed a corpus luteal cyst in the right adnexa and an intrauterine pregnancy thus discounting pelvic lymph node involvement. The patient was counseled about radiation exposure. She elected to have a therapeutic abortion and received chemotherapy. This case highlights the need to be cognizant of physiologic changes associated with possible pregnancy.
Tufts-New England Medical Center, Boston, Massachusetts, USA. sbagga@tufts-nemc.org
Sanjeev
S
Bagga
D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008206:Lymphatic Diseases / Q000175:diagnosis*; D010048:Ovarian Cysts / Q000175:diagnosis*; D049268:Positron-Emission Tomography / Q000379:methods*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D013382:Subtraction Technique; D014057:Tomography, X-Ray Computed / Q000379:methods*