Mass within the gastrointestinal system
Made up of organic or inorganic material
Commonly from eating hair or indigestible materials
Risk factors include intellectual disability or emotional disturbance
More common females aged 10 to 19 years of age
Gastric dysmotility
Gastric outlet obstruction
Dehydration
Medications
Anticholinergic
Opiates
Anticholinergic
Opiates
Food boluses
Lactobezoar (seen in premature infants receiving formula)
Pharmacobezoars (medications, especially overdoses of sustained-release medications
Phytobezoars (indigestible plant  material)
Trichobezoar (hair)
Ear foreign body
Nasal foreign body
Ocular foreign body
Aspirated foreign body
GI
Ingested foreign body<unk> 
Body packing
Esophageal foreign body removal with foley catheter
Rectal foreign body
Soft tissue foreign body
Ingested foreign body<unk> 
Body packing
Esophageal foreign body removal with foley catheter
Rectal foreign body<unk> 
Body packing
Esophageal foreign body removal with foley catheter
Bezoar
Gastroesophageal reflux disease 
Tar burn
Peptic ulcer disease with or without perforation
Nailbed laceration
Gastritis
Cement burn
Pancreatitis