Unusual Pulmonary Metastases of Uterine Endometrial Stromal Sarcoma 903 Here, we report a case of unusual pulmonary metastatic uterine ESS in a 37-yr-old female with a diffuse micronodule and GGO on chest CT. Pulmonary metastases of low grade ESS may have an excellent prognosis and little effect on sur- vival. REFERENCES 1. Aubry MC, Myers JL, Colby TV, Leslie KO, Tazelaar HD. Endome- trial stromal sarcoma metastatic to the lung: a detailed analysis of 16 patients. Am J Surg Pathol 2002; 26: 440-9. 2. Mahadeva R, Stewart S, Wallwork J. Metastatic endometrial stromal sarcoma masquerading as pulmonary lymphangioleiomyomatosis. J Clin Pathol 1999; 52: 147-8. 3. Itoh T, Mochizuki M, Kumazaki S, Ishihara T, Fukayama M. Cystic pulmonary metastases of endometrial stromal sarcoma of the uterus, mimicking lymphangiomyomatosis: a case report with immunohisto- chemistry of HMB45. Pathol Int 1997; 47: 725-9. 4. Dines DE, Cortese DA, Brennan MD, Hahn RG, Payne WS. Malig- nant pulmonary neoplasms predisposing to spontaneous pneumotho- rax. Mayo Clin Proc 1973; 48: 541-4. 5. Satoh Y, Ishikawa Y, Miyoshi T, Mukai H, Okumura S, Nakagawa K. Pulmonary metastases from a low-grade endometrial stromal sar- coma confirmed by chromosome aberration and fluorescence in-situ hybridization approaches: a case of recurrence 13 year after hysterec- tomy. Virchows Arch 2003; 442: 173-8. 6. Abrams J, Talcott J, Corson JM. Pulmonary metastases in patients with low-grade endometrial stromal sarcoma. Clinicopathologic find- ings with immunohistochemical characterization. Am J Surg Pathol 1989; 13: 133-40. 7. Chang KL, Crabtree GS, Lim-Tan SK, Kempson RL, Hendrickson MR. Primary uterine endometrial stromal neoplasms. A clinicopatho- logic study of 117 cases. Am J Surg Pathol 1990; 14: 415-38.