Joo-Hyuk Lee

MRI for Pretreatment Lymph Node Staging in Uterine Cervical Cancer

OBJECTIVE The purpose of this article is to assess the accuracy of MRI in detecting pelvic and paraaortic lymph node metastasis from uterine cervical cancer using various imaging criteria. CONCLUSION Although MRI analysis resulted in relatively low sensitivity, size and margin (spiculated or lobulated) were useful criteria for predicting lymph node metastasis from cervical cancer.

Computed tomography findings of ovarian metastases from colon cancer: comparison with primary malignant ovarian tumors.

Objective: The computed tomography (CT) findings of ovarian metastases from colon cancer were evaluated and were compared with those of primary malignant ovarian tumors. Methods: Sixteen patients with 21 masses from colon cancer and 20 patients with 31 primary malignant ovarian tumors were included in this study. The CT findings (laterality, size, margin, shape, mass characteristic, strong enhancement of cyst wall, enhancement of solid portion, amount of ascites, peritoneal seeding, lymph node enlargement, and metastasis) and ages of the patients in both groups were compared. Univariate analysis, the Pearson χ2 test, and the independent-samples t test were used to distinguish them. Results: A smooth margin of the tumor (odds ratio = 24.3, 95% confidence interval: 2.9-204.2) and cystic nature of the mass (Pearson χ2 = 12.96, P = 0.005) were strong predictors of ovarian metastasis from colon cancer. Conclusion: Ovarian metastases from colon cancer show a smooth margin and more cystic nature on CT compared with primary malignant ovarian tumors.

Contrast-Enhanced CT for Differentiation of Ovarian Metastasis from Gastrointestinal Tract Cancer: Stomach Cancer Versus Colon Cancer

OBJECTIVE The purpose of our study was to determine whether the CT findings of ovarian metastasis from stomach cancer differ from those of ovarian metastasis from colon cancer. CONCLUSION On contrast-enhanced CT scans, ovarian metastatic lesions from stomach cancer appear more solid than, more frequently have dense enhancement of the solid portion, and are smaller than ovarian metastatic lesions from colon cancer.

CT findings of clear cell carcinoma of the ovary

Purpose: The purpose of this article was to retrospectively evaluate computed tomographic (CT) findings in patients with pathologically proved clear cell carcinoma of the ovary. Methods: CT scans of seven patients (age range, 28-79 years; mean age, 46 years) with nine lesions of histologically proved primary ovarian clear cell carcinoma of the ovary were retrospectively evaluated by two radiologists in consensus. Scans were evaluated for the laterality, size, mass characteristic, margin, attenuation of the cystic portion, internal architecture, and presence of lumen protruding mass. Results: Tumors were unilateral in five patients. The average size of the tumors was 8.6 cm (range, 2.6-12.1 cm). All the masses showed mainly cystic appearance. All nine masses had smooth margin. Average attenuation of the cystic portion of the masses was 24.2 HU (Hounsfield unit) (range, 13-34 HU). Tumors usually appeared as unilocular cystic mass (n=6). Lumen protruding masses appeared in seven tumors. Conclusion: On CT scans, primary ovarian clear cell carcinomas appeared as large unilocular, mainly cystic, smooth marginated mass with lumen protruding solid portion and high-attenuated cystic portion.

Transient pulmonary eosinophilia incidentally found on low-dose computed tomography: findings in 40 individuals.

Purpose: To describe computed tomography (CT) findings of transient pulmonary eosinophilia (TPE) incidentally found on low-dose CT (LDCT) and to identify suggestive CT features helpful in initial diagnosis. Materials and Methods: We retrospectively reviewed LDCT scans in 40 individuals who met criteria for having TPE. There were 35 men and 5 women (age range, 32-62 years; mean, 48.5 ± 9 years). Initial LDCT scans were assessed as either (a) nodules, further characterized as either solid, solid associated with a halo of ground-glass attenuation, or pure ground-glass lesions as well as by number, size, and location or (b) ill-defined foci of parenchymal consolidation. Results: A range of focal parenchymal abnormalities (n = 78) were identified-both single (48%) and multiple (52%). Most of these proved to be either solid nodules with discrete ground-glass halos (72%), or poorly defined solid nodules exhibiting a variety of differing morphologies (24%). Ill-defined foci of consolidation were noted in 3 cases (4%). The lesions were predominantly located in the lower lung zone (73%) with peripheral distribution (92%). Conclusions: Transient pulmonary eosinophilia most often manifests as solid nodules with associated ground-glass halos. Awareness of TPE should serve to limit the number of mistaken diagnoses of early lung cancer.