Comet tail reverberation, which is due to reflections from cholesterol crystals, is a highly specific sign for adenomyomatosis.On CT scan, it may show rosary sign, showing mucosal epithelium with intramural diverticula.Magnetic resonance imaging also plays an important role in the diagnosis of Rokitansky–Aschoff sinuses. In fat-suppression MRI, RAS present with small, rounded, high signal intensity foci, called “pearl necklace sign”. Eponym
Rokitansky–Aschoff sinuses are named after Carl Freiherr von Rokitansky (1804–1878), a pathologist in Vienna, Austria and Ludwig Aschoff (1866–1942), a pathologist in Bonn, Germany. See also
Cholecystectomy
Strawberry gallbladder
Diverticulum
Hyperplasia
Gallbladder

References
External links

00859 at CHORUS
Caffeine-induced sleep disorder is a psychiatric disorder that results from overconsumption of the stimulant caffeine. Caffeine is one of the most widely consumed psychoactive drugs: almost 90% of Americans in a survey consume some type of caffeine each day. "When caffeine is consumed immediately before bedtime or .... throughout the day, sleep onset may be delayed, total sleep time reduced, normal stages of sleep altered, and the quality of sleep decreased." Caffeine reduces slow-wave sleep in the early part of the sleep cycle and can reduce rapid eye movement sleep later in the cycle. Caffeine increases episodes of wakefulness, and high doses in the late evening can increase sleep onset latency. In elderly people, there is an association between use of medication containing caffeine and difficulty in falling asleep.The specific criteria for this disorder in the fourth version of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) include that there must be a significant inability to sleep which is caused entirely by the physiological effects of caffeine as proven by an examination; if sleeping issues can be accounted for due to a breathing-related sleep disorder, narcolepsy, a circadian rhythm sleep disorder or a mental disorder, then caffeine-induced sleep disorder is not the cause. This condition causes a notable impairment in functioning. The ICD-10 criteria for the principally same disorder is F15:982. Caffeine and age
Most studies now, find that there is relatively no association between caffeine and its effects on sleep for infants.