manta ray sign (bladder)

The manta ray sign is a radiographic appearance in bladder exstrophy. It describes wide midline separation of the pubic bones simulating the appearance of a manta ray swimming towards you . The sacrum and iliac wings recall the manta ray’s head and body, with the widely spaced pubic rami forming its cephalic flaps .

Differential diagnosis

On a plain radiograph consider:

• open book pelvic injuries: the smooth arc of the pelvis outline in bladder exstrophy differentiates it from acquired separation of the pubic symphysis seen in open book pelvic injuries

Siehe auch:

• Blasenekstrophie