X-ray and CT findings of costal eosinophilic granuloma / 中华放射学杂志

Objective To study the X-ray and CT features of costal eosinophilic granuloma for a better understanding.Methods Eight patients with costal eosinophilic granuloma proved by surgery or biopsy were analyzed retrospectively.All patients had X-ray plain film, 6 patients had CT examination,including a case of enhanced CT scan.Results All 8 lesions were solitary.Six lesions were in the anterior rib and 2 in the posterior rib.On X-ray, all case showed single cavity and oval lesion with clear boundary.On CT images, 5 lesions demonstrated expansile destruction of bone with cortical bone thinning, and 3 were osteolystic destruction with soft tissue mass around.On the patient with enhanced CT scan, the lesions showed a moderate and uniform enhancement.Conclusion The X-ray and CT findings of costal eosinophilic granuloma are characteristic.

Basal cell adenomas of the parotid gland: CT and MRI features / 中华放射学杂志

Objective To investigate the CT and MR] features of basal cell adenoma of the parotid gland. Methods CT and MRI features of 9 basal cell adenoma cases (4 men and 5 women, median age 58) confirmed by operation and pathology were reviewed retrospectively. All CT and MR images were retrospectively evaluated with respect to location, size, morphology, margin, CT density/MR] signal intensity and enhancement behavior. Results Each of the 9 patients had only 1 tumor. Eight lesions were located in the superficial lobe and 1 in the deep lobe. Seven tumors were round without lobular appearance, and 2 tumors were elliptic with small lobular appearance. All the 9 lesions were well circumscribed with smooth contours. A capsule-like rim with low intensity on MR[ was observed in 2 lesions, and a rim with high intensity on T1 WI and T2 WI was detected in another lesion. These 3 lesions showed low intensity on T1 WI and T2 WI with heterogeneously strong enhancement and delayed enhancement. Four lesions showed cystic areas in the center with mural nodules on CT, which were moderately or obviously enhanced (the mean increase of CT values: 65.5 H U ), and 2 lesions showed homogeneous enhancement. Conclusion Basal cell adenoma of parotid gland should be first considered when the old women had single round lesion located in the superficial lobe with smooth contour and low intensity on T2WI, especially when cystic areas were observed in the center with mural nodules on CT/MR.

Imaging Analysis of Intrathoracic Tumor-simulating Extramedullary Hematopoiesis / 实用放射学杂志

Objective To improve the accuracy of imaging diagnosis of intrathoracic tumor-simulating extramedullary hematopoiesis(EMH).Methods The chest radiographs and CT findings in two cases of intrathoracic tumor-simulating EMH with thalassemia were analyzed respectively and some related literatures were reviewed.Results A conventional chest X-ray showed rotundity or lobulated masses in the posterior inferior mediastinum in two cases, and CT scans showed smoothly marginated , homogeneous, lobulated paravertebral masses, on enhanced CT scans, the masses showed mild homogeneous enhancement.Conclusion Although intrathoracic tumor-simulating EMH is short of typical imaging features, the combination of clinical ,laboratory and radiological findings could make the diagnosis of intrathoracic tumor-simulating EMH, so unnecessary treatment or surgery could be avoided.