Experience in retake analysis for digital mammography at a university hospital.

Data from one digital mammograph (flat detector active area of 19.2 × 23 cm(2)) were collected over a 1-year period using locally developed software in order to evaluate retakes, their rates, their causes and the possible measures to reduce their occurrence. Among them, 7.1 % of the images were marked as repetitions, and in 16 % of the studies, at least one image was repeated. When evaluating causes of retakes, the primary cause was incorrect positioning (49 %), closely followed by additional retakes in cases of large breasts (44 %). When dealing with large breasts and using a small flat panel, additional images were necessary to fully visualise the breast, and as a consequence, some breast regions received repeated radiation exposure. Moreover, a small detector increases retakes in breasts slightly wrongly positioned. To try and reduce the retake rate, it is important to plan training sessions based on images selected from the retake analysis.

[Congenital nasal pyriform aperture stenosis]. / Estenosis congénita de la apertura piriforme nasal.

Obstruction of the nasal airway is potentially lethal in newborns because they are forced to breathe through their noses. The most common cause of obstruction is atresia of the choanae; however, other entities such as congenital nasal pyriform aperture stenosis, although rare, must be considered in the differential diagnosis of a newborn that shows signs and symptoms of upper airway compromise. We report two cases of nasal pyriform aperture stenosis seen at our center; we describe the main characteristics of the condition and review the relevant literature.

[Cystic lymphangioma of the spleen in a patient with Klippel-Trenaunay-Weber syndrome: MRI findings]. / Linfangioma quístico esplénico en una paciente con síndrome de Klippel-Trenaunay-Weber. Hallazgos en la ecografía y la RM.

We present the case of a 22-year-old woman with Klippel-Trenaunay-Weber syndrome who presented with clinical signs and symptoms of gastrointestinal obstruction. Ultrasonography and magnetic resonance imaging showed massive splenomegaly with multiple cysts replacing the normal parenchyma of the spleen. Histologic study after splenectomy confirmed the diagnosis of cystic lymphangioma of the spleen, which is an exceptional manifestation of Klippel-Trenaunay-Weber syndrome.

[Imaging findings in catamenial pneumothorax]. / Neumotórax catamenial.Hallazgos radiológicos.

OBJECTIVE: To show the presentation and imaging findings of catamenial pneumothorax. MATERIAL AND METHODS: We reviewed the imaging tests (plain-film radiography, computed tomography [CT], magnetic resonance [MR]) performed in six women aged between 28 and 44 years with recurrent pneumothorax associated to menstruation. All patients underwent videothoracoscopic surgery and thoracotomy was necessary in three due to the recurrence of the pneumothorax. RESULTS: CT was performed in three cases and found pleural nodules in two; one of these was confirmed at MR. Pleural endometriosis was only demonstrated at histological examination in one case. Diaphragmatic blebs and bullae were found in five of the six patients. DISCUSSION: The most common symptoms of catamenial pneumothorax are chest pain, dyspnea, and hemoptysis. The right side is affected in 90% of cases. The radiological findings are pneumothorax, hemothorax, or hydropneumothorax. CT and MR can help to identify the pleural lesions that are not visible on plain-film radiographs and are a very common finding at surgery. CONCLUSION: The diagnosis of catamenial pneumothorax should be suspected in fertile-aged women with a history of recurrent pneumothorax coinciding with menstruation. CT and MR can help to identify lesions suspicious of endometriosis.