The primary role of ultrasound in evaluating right-sided diaphragmatic humps and juxtadiaphragmatic masses: a review of 22 cases

Post-traumatic diaphragmatic herniation of the liver, examined by positron emission tomography: case report

We present a case of post-traumatic diaphragmatic herniation of the liver, which mimicked an intrathoracic tumor. After an automobile accident, the patient underwent thoracotomies for hemothorax and lung cancer in the right chest. Seven months later, computed tomography (CT) demonstrated a round tumor in the thorax adjacent to the right diaphragm with a higher density than the liver parenchyma. An intrathoracic tumor including a primary or metastatic lung cancer was suspected. However, positron emission tomography (PET) showed that the uptake of fluorine-18-fluorodeoxyglucose (FDG) was identical to that in the liver, and the tumor appeared to be contiguous with the liver. Thus, we suspected liver herniation. Core needle biopsy revealed liver cells without neoplastic tissue. Upon surgical exploration, herniation of the liver was found and repaired. PET was helpful in providing morphological and functional information leading to accurate diagnosis of liver herniation in this unusual case.

Imaging of diaphragmatic rupture after trauma

Traumatic rupture of the diaphragm usually results from blunt or penetrating injuries, or iatrogenic causes. Most cases are initially overlooked in the acute phase because they present with variable clinical and radiological signs. An overlooked diaphragmatic injury presents as a hernia many years later with potentially serious complications, therefore selection of the most appropriate radiological technique and accurate diagnosis of traumatic diaphragmatic hernias (DH) on the first admission is important. Although the diagnosis of diaphragmatic injuries is problematic, various investigations may be used for diagnosis. We describe the imaging findings of 19 traumatic DH cases with various imaging techniques. The patients were acute trauma cases or cases with prior trauma or thoraco-abdominal surgery with clinical suspicion of DH. An evaluation of the imaging techniques used in the diagnosis of DH is presented.

Congenital diaphragmatic eventration as a cause of anterior mediastinal mass in the children: imaging modalities and literature review

Congenital eventration of the diaphragm, as a cause of mediastinal mass, is an unusual condition and it may be unilateral or bilateral. Although this entity is frequently asymptomatic and firstly detected on the chest radiography, it may be difficult to distinguish a partial eventration from the other diaphragmatic lesions or mediastinal pathologies on the chest radiographs. US may present valuable information about diaphragm integrity with eventration content or the other diaphragmatic pathologies. Although the other imaging modalities such as fluoroscopy, computed tomography, and MR imaging may be performed as adjunct techniques in cases of the diagnosis still in doubt, they are frequently unnecessary after US. Our goal is to present imaging features and management of this entity together with a literature review.

Pulmonary sulcus metastases simulating intraabdominal malignancy in childhood tumors

Wilms tumor, the most common solid childhood malignancy, is frequently associated with pulmonary metastases, while hepatic metastases occur less frequently. Metastases to the lower lobes of the lungs, when deep in the costophrenic sulcus, may simulate an intraabdominal mass. The differentiation of these lesions is important both diagnostically and therapeutically. Three cases are presented in whom pulmonary sulcus metastases simulated abdominal lesions on computed tomography and could not be clearly localized as thoracic in origin on liver/spleen scintigraphy. Ultrasound evaluation was the most useful; however, integration with other imaging techniques was necessary to correctly identify these lesions as being of pulmonary origin.