Prune belly syndrome is a rare, genetic birth defect affecting about 1 in 40,000 births. About 97% of those affected are male. Prune belly syndrome is a congenital disorder of the urinary system, characterized by a triad of symptoms. The syndrome is named for the mass of wrinkled skin that is often (but not always) present on the abdomen of those with the disorder. Signs and symptoms
Prune-belly triad consists of signs such as: Cryptorchidism, abdominal wall defects and genitourinary defects:
A partial or complete lack of abdominal wall muscles. There may be wrinkly folds of skin covering the abdomen. Cryptorchidism (undescended testicles) in males
Urinary tract abnormality such as unusually large ureters, distended bladder, accumulation and backflow of urine from the bladder to the ureters and the kidneys (vesicoureteral reflux)Other signs include:

Frequent urinary tract infections due to the inability to properly expel urine. Ventricular septal defect
Malrotation of the gut
Club foot
Later in life, a common symptom is post-ejaculatory discomfort. Most likely a bladder spasm, it lasts about two hours. Musculoskeletal abnormalities include pectus excavatum, scoliosis, and congenital joint dislocations including the hip. Diagnosis of prune belly syndrome necessitates a thorough orthopaedic evaluation because of the high prevalence of associated musculoskeletal abnormalities. Pulmonary hypoplasia, pneumonia, and atelectasis involving lung lobes

Complications
Prune belly syndrome can result in distention and enlargement of internal organs such as the bladder and intestines. Surgery is often required but will not return the organs to a normal size.
The word comes from the name of the family Anatidae, and was used in Gary Larsons The Far Side. Anoraknophobia – a portmanteau of "anorak" and "arachnophobia". It was used in the Wallace and Gromit comic book Anoraknophobia. Also the title of an album by Marillion. Arachibutyrophobia – fear of peanut butter sticking to the roof of the mouth, from Latin arachis "peanut" and butyrum "butter". The word is used by Charles M. Schulz in a 1982 installment of his Peanuts comic strip, and by Peter ODonnell in his 1985 Modesty Blaise adventure novel Dead Mans Handle. Charlophobia – the fictional fear of any person named Charlotte or Charlie, mentioned in the comedic book A Duck is Watching Me: Strange and Unusual Phobias (2014), by Bernie Hobbs. The phobia was created to mock name bias, a form of discrimination studied by researchers at the University of California, Berkeley and the University of Chicago. Hippopotomonstrosesquipedaliophobia – fear of long words, from the root word sesquipedalophobia combined with monstrum and hippopotamus. This was mentioned on the first episode of Brainiac Series Five as a Tickles Teaser. Keanuphobia – fear of Keanu Reeves, portrayed in the Dean Koontz book, False Memory, where a woman has an irrational fear of Reeves and has to see her psychiatrist, Mark Ahriman, each week, unaware that she only has the fear in the first place because Ahriman implanted it via hypnotic suggestion to amuse himself. He calls her "Keanuphobe" in his head.