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Infant with respiratory distress

Normal inspiratory and expiratory CXR
Initial CXR AP (left) shows the heart to be enlarged and the pulmonary vascularity to be congested and there are low lung volumes. Repeat CXR AP obtained 5 minutes later in inspiration (right) shows the heart to be normal in size and the pulmonary vascularity is not congested and there are normal lung volumes.

The diagnosis was normal expiratory and inspiratory radiographs of the chest, with the expiratory radiograph mimicking cardiogenic pulmonary edema.

Young adult with newly rising ammonia levels after bone marrow transplant

US of sinusoidal obstruction syndrome
Spectral doppler US of the left, middle and right hepatic veins from 2 days ago (left) shows them to be of normal caliber and to have normal appearing phasicity. Spectral doppler US of the left, middle, and right hepatic veins today (right) shows the hepatic veins to be compressed and difficult to see and to have spectral broadening and loss of phasicity. The flow velocity in the main portal vein had decreased by 50% between the two exams.

The diagnosis was sinusoidal obstruction syndrome.

Teenager who had thoracic surgery a week ago and now has sepsis

MRI of infective endocarditis of the brain and CT of infective endocarditis of the spleen and kidneys
Coronal T1 MRI with contrast of the brain (above) shows multiple small enhancing lesions in the brain and one large ring enhancing lesion in the right hemisphere of the brain. Coronal CT with contrast of the abdomen (below) shows multiple peripheral low density wedge shaped lesions in the spleen and both kidneys.

The diagnosis was infective endocarditis leading to cerebral abscess and splenic abscess and renal abscess.

Premature newborn with apnea and bradycardia

US of cerebellar hemorrhage
Coronal US of the brain (above) shows round areas of increased echogenicity in the cerebellar hemispheres, left larger than right which are also seen on the sagittal US of the left cerebellum (lower left) and right cerebellum (lower right). The ventricular system was dilated due to bilateral intraventricular hemorrhage (not pictured).

The diagnosis was bilateral neonatal cerebellar hemorrhage.

Teenager with abdominal pain and increased WBC and CRP

CT of splenic volvulus
Axial CT with contrast of the upper abdomen in the portal venous phase (above left) shows the spleen is absent from the left upper quadrant and is instead seen in the midline of the pelvis (above right). Coronal (below left) and sagittal (below right) CT in the delayed phase show the spleen to be in the midline of the pelvis above the bladder. The splenic vascular pedicle had a whirlpool appearance (not provided).

The diagnosis was splenic volvulus.

Newborn with increasing respiratory distress after subclavian venous catheter placement for total parenteral nutrition (TPN) 2 days ago

CXR of pericardial effusion due to malposition of central line in the pericardial space
CXR AP (left) shows the tip of the newly placed left subclavian venous catheter to project deep within the right atrium while the cardiac silhouette is normal in size. CXR AP 2 days later (right) shows the catheter tip unchanged in position while the cardiac silhouette has increased markedly in size in the interval. Cardiocentesis returned TPN.

The diagnosis was subclavian venous catheter malposition in the pericardial space resulting in a pericardial effusion and cardiac tamponade.

Newborn with respiratory distress

UGI of esophagotrachea
CXR AP (left) shows the endotracheal rube tip in the midline to be low in position while the nasogastric tube tip projecting to the left of it is high in position. AP image from an esophagram obtained after the nasogastric tube had been advanced into the distal esophagus (above right) shows simultaneous opacification of the trachea in the midline and the bilateral mainstem bronchi along with esophagus to the left of the trachea. Lateral image from the esophagram (below right) shows the communication between the esophagus and trachea to be long in length.

The diagnosis was esophagotrachea.

School ager with headaches and visual disturbances

CT of pineoblastoma
Axial (above left), coronal (above right) and sagittal (below) CT without contrast of the brain shows a large, round, high density mass in the region of the pineal gland causing obstructive hydrocephalus and transependymal flow of cerebrospinal fluid. The right frontal intracranial air on the axial image is due to recent placement of a ventriculoperitoneal shunt.

The diagnosis was pineoblastoma.

Teenager with left throat pain and a left throat mass for 3 months

MRI of liposarcoma
Axial (above left) and sagittal (above right) TI MRI without contrast of the face shows a high signal intensity mass in the left pharyngeal and masticator and parotid spaces that is displacing the palatine tonsils and airway. Coronal T1 MRI with contrast with fat supression (below left) and without fat supression (below left) shows the mass to not enhance. The mass follows fat signal on all sequences.

The diagnosis was liposarcoma.