Type II cystic adenomatoid malformation in a 29-week-old fetus. (a) Coronal single-shot
fast spin-echo MR image shows multiple small cysts in the lower lobe of the right lung. (b) Coronal
gadolinium-enhanced MR angiogram obtained 4 days after birth clearly shows an aberrant artery from
the abdominal aorta.
INFANTILE CORTICAL HYPEROSTOSIS: ULNAR INVOLVEMENT. Note involvement of the ulna, with sparing of the radius and humerus.COMMENT: The ulna is the most frequently involved long bone in infantile cortical hyperostosis
Malrotation with volvulus in a neonate. Radiographs obtained with barium administered via a nasogastric
tube show a corkscrew appearance of the duodenum and an abnormal position of the duodenojejunal
junction on both frontal (a) and lateral (b) views, features indicative of volvulus, which constitutes a surgical
emergency.
Diagnosis: GastroEsophageal varices
Differential Dx: Esophageal varices, Varicoid carcinoma of the esophagus, Inflammation of distal esophagus secondary to reflu
frontoparietal subdural haematoma (arrows) with a fluid level (arrowheads). Note the hyperdense acute component at the dependent
portion and the hypodense chronic component in the non-dependent portion.
Ameloblastoma. Lateral oblique radiograph of the mandible shows an expansile, multilocular, lucent lesion with coarse internal trabeculae and displacement of teeth and adjacent structures. The differential diagnosis includes ameloblastoma and odontogenic keratocyst. (3) Ameloblastoma. Axial CT scan shows an expansile, locular, hypoattenuating lesion in the left aspect of the mandible with well-corticated buccal expansion. (4) Mural ameloblastoma. Low-power photomicrograph (hematoxylin-eosin stain) shows an ameloblastoma (T) arising from the epithelial lining (arrow) of a dentigerous cyst surrounded by a fibrous capsule (F).