Keywords
intussusception - Rapunzel syndrome - trichobezoar
Introduction
Compulsive eating disorders or pica can occur in children and adults with psychological
disturbances leading to ingestion of indigestible fibers of thread, hair, and other
materials. These may subsequently conglomerate and form a mass in the stomach known
as a bezoar. When a trichobezoar, made of hair or cotton thread, extends into the
duodenum or distal small intestine like a tail, it is referred to as the Rapunzel
syndrome, a rare form of trichobezoar.[1]
[2]
Rapunzel syndrome has usually been described in association with ingested human hair.
There have only been a few case reports of cotton thread bezoar reported in the literature,[3]
[4]
[5] and only rarely reported in association with Rapunzel syndrome.[2] If undiagnosed, bezoars may lead to gastrointestinal (GI) ulceration, perforation,
peritonitis, pancreatitis, biliary obstruction, severe nutritional disturbances, and
rarely intestinal obstruction.[5]
[6]
Intussusception as a complication of bezoar has also been rarely described in the
literature, usually associated with bowel obstruction.[7]
[8] It has been postulated that the tail of the bezoar and the intraluminal strands
interfere with the small bowel peristalsis and hence predispose to intussusception.[9] It is also possible that a purse-string effect due to shorter length of the bezoar
tail, compared with the length of the small intestine, may lead to foreshortening
and contraction of the mesenteric side of the small bowel wall, leading to intussusception.[10] Whatever the cause, it is important to remember that bezoars may sometimes be the
undeclared cause of intussusception, especially in recurrent cases.
Imaging is crucial in the diagnosis of Rapunzel syndrome and intussusception. Upper
GI endoscopy is the investigation of choice in these patients and may also aid therapeutic
retrieval of the bezoar.[1] We describe a case of Rapunzel syndrome due to a cotton thread bezoar in an adolescent
girl associated with multiple small bowel intussusceptions, followed by a review of
the literature.
Case Description
An 11-year-old girl presented to the gastroenterology clinic with complaints of weight
loss and loss of appetite, as well as behavioral changes and dullness. There was also
a forthcoming history of a craving to eat threads from clothes for nearly 10 years.
On physical examination, a hard, nontender mass was palpated in the epigastrium raining
the clinical suspicion of a trichobezoar. Blood tests were normal. A preliminary ultrasonogram
of the abdomen and pelvis performed elsewhere demonstrated “excessive bowel gas” and
no other significant abnormality. An upper GI endoscopy showed a large gastric trichobezoar
entirely filling the gastric lumen and obscuring the distal end of the bezoar. Contrast-enhanced
computed tomography (CT) (CECT) of the abdomen was performed on a 128-detector scanner
(Philips Ingenuity, Germany) as a single venous phase 70 seconds after an intravenous
pressure injection of 45 mL of Omnipaque (Wipro GE Heathcare Pvt Ltd, Shanghai, China)
at 112 mAs and 120 kV. CECT demonstrated a large, organized, intraluminal bezoar with
a mottled appearance due to entrapped air, extending into the duodenum and proximal
jejunum ([Figs. 1]
[2]). The stomach was dilated; there was mild thickening of the stomach and jejunum.
At least four short segments of jejunojejunal intussusception were found as “target
signs” ([Fig. 3]).
Fig. 1 Topogram demonstrates mottled appearance of an intraluminal bezoar in a mildly dilated
stomach and within a dilated jejunal loop in the left upper abdomen (arrows).
Fig. 2 Axial computed tomography (CT) with oral and intravenous contrast depicts the bezoar,
seen as a nonenhancing heterogeneous intraluminal mass with mottled air foci within,
coursing across the stomach, D3 segment of the duodenum, and proximal jejunum (arrows).
A bezoar may occasionally be confused for ingested food material.
Fig. 3 Axial computed tomography (CT) with oral and intravenous contrast depicts jejunal
intussusception (arrow) seen as target or doughnut sign. There is also mild mural
thickening of the jejunal loops.
Attempts to endoscopically remove the bezoar were futile because the bexoar length
was over 25 cm; laparoscopic gastrostomy and removal of the bezoar was planned. The
patient, however, refused surgery and was lost to follow-up.
Discussion
Compulsive eating disorders or pica can occur in children and adults with psychological
disturbances leading to ingestion of indigestible fibers of thread, hair, and other
materials. These may subsequently conglomerate and form a mass in the stomach known
as a bezoar. When a trichobezoar, made of hair or cotton thread, extends into the
duodenum or distal small intestine like a tail, it is referred to as the Rapunzel
syndrome, a rare form of trichobezoar.[1] Rapunzel syndrome has usually been described in association with ingested human
hair. There have only been a few case reports of cotton thread bezoar reported in
the literature,[3]
[4] and fewer reported in association with Rapunzel syndrome.[2]
[6] It has been postulated that smooth strands of hair or organic fibers that fail to
propel distally by gastric peristalsis are chronically lodged in the gastric mucosal
folds, and are molded into a ball by peristaltic activity and pyloric hold-up to form
a bezoar. Finally, resultant gastric atony leads to retention of the bezoar in the
stomach.[6]
[11] Gastric hypomotility and surgical procedures such as vagotomy have also been implicated
as predisposing factors.[4]
Bezoars may be asymptomatic for a long time, or present with nausea, vomiting, abdominal
pain, dyspepsia, or GI bleeding. If undiagnosed, they may lead to ulceration, perforation,
peritonitis, pancreatitis, biliary obstruction, nutritional disturbances such as protein-losing
enteropathy, anemia, and vitamin B12 deficiency, and, rarely, intestinal obstruction.[6]
Intussusception, as a complication of bezoar, has also been rarely described in the
literature. Ha et al reported a case of multiple small bowel intussusceptions and
bowel obstruction caused by a gastric trichobezoar in a 5-year-old girl, subsequently
reduced by laparoscopic intervention.[7] Prasanna et al reported a case of Rapunzel syndrome from trichobezoar, with multiple
small intestinal intussusceptions which were manually reduced at surgery.[8] Anantha et al reported a similar case in a 9-year-old boy, who had a gastrostomy
and multiple enterotomies to retrieve a thick bezoar causing long segment of ileal
intussusception.[9]
Although a bezoar is not inherently attached to the bowel wall, it seems to incite
small bowel intussusception. It has been postulated that the tail of the bezoar and
the intraluminal strands interfere with small bowel peristalsis; the resultant bowel
dysmotility and mucosal irritation possibly predisposes to intussusception.[9] Another theory for the etiology of intussusception, explained by Naik et al, is
a purse-string effect, due to shorter length of the bezoar tail, compared with the
length of the small intestine, leading to foreshortening or contraction of the mesenteric
side of the small bowel wall.[10] Whatever the cause, it is important to remember that bezoars may sometimes be the
undeclared cause of intussusception, especially in recurrent cases. In our case, however,
the intussusceptions did not cause bowel obstruction and were assumed to be transient
and self-limiting.
Imaging is crucial in the diagnosis of bezoar. Abdominal radiographs may demonstrate
a mottled mass in the stomach. Ultrasonography may depict a curvilinear hyperechoic
mass with bright echogenic bands caused by the fibers. However, multiple acoustic
interfaces created by trapped air and ingested food as well as posterior acoustic
shadowing may limit adequate visualization of the mass.[1]
[12] On an upper GI contrast study, an intraluminal mass having no connection to the
gastric wall, with “barium in the honeycomb interstices” has been described. It also
helps delineate ulcers that may occur as a result of the bezoar. Fluoroscopic contrast
study with the patient in the erect position may demonstrate initial contrast stasis,
followed by slow insinuation on all sides of an intraluminal mass, outlining the curvatures
and contour of the stomach, like a cast.[10] CT may demonstrate a nonenhancing heterogeneous intraluminal mass, with mottled
air foci within, and a sign described as “compressed concentric rings.”[13] The extent of the bezoar and associated complications can be assessed on CT. A bezoar
may be mistaken for retained food debris due to a gastric outlet obstruction; however,
the lack of a straight air-fluid-debris level and the presence of oral contrast or
gastric fluid insinuating between the dependent gastric wall and the surface of the
bezoar can help differentiate these entities. Sometimes, a high index of clinical
suspicion may be required for diagnosis.[7] Upper GI endoscopy is the investigation of choice in these patients and may also
aid therapeutic retrieval of the bezoar; however, this may not be achievable in all
patients, especially those with large bezoars, and does carry a small risk of perforation.[1]
Surgical removal is the treatment of choice for Rapunzel syndrome to prevent complications
due to the enormous length of the bezoar.[14] It is important to keep in mind that multiple bezoars may be lodged distally in
the small intestine, and must be excluded at preoperative imaging and intraoperative
examination.[2] Needless to say, adequate psychological support and counseling following removal
of the bezoar, along with parental support and supervision, is crucial to prevent
recurrence.
In summary, Rapunzel syndrome due to a cotton thread bezoar is rare, and a high index
of suspicion and familiarity with imaging features is important to prevent late diagnosis
and complications. Rapunzel syndrome may sometimes be a rare cause of small bowel
intussusception with or without bowel obstruction. It is important to remember that
intussusception in a child or adult may be triggered by ingested foreign bodies.
“Rapunzel, Rapunzel, let down your hair, so that I may climb thy golden stair,” so
said the Brothers Grimm, Jacob and Wilhelm Grimm, German philologists, cultural researchers,
and lexicographers, the creators of the interesting Rapunzel story.
