Chronic, nonbloody diarrhea may represent a diagnostic challenge in patients with
inconclusive findings after standard clinical work-up [1]. In this setting, small-bowel capsule endoscopy (SBCE) has high sensitivity and
a favorable clinical impact in assessing the presence of small-bowel mucosal lesions
in patients with suspected Crohn’s disease and no obstructive symptoms [1]
[2]
[3].
Very recently, the CapsoCam SV-1 (CapsoVision, Inc. Saratoga, California, USA) has
been introduced as a new standard in SBCE. The system allows lateral panoramic 360°
viewing with wire-free technology, longlasting battery life, and 12 – 20 frames per
second captured by four high-resolution cameras located on the capsule sides and facing
the four quadrants of the digestive wall [4]
[5]. To the best of our knowledge, there is no published report on the use of this new
technique in patients with suspected small-bowel Crohn’s disease. Here, the case of
a 51-year-old woman with a 2-year history of chronic, nonbloody diarrhea is presented.
Physical examination was unremarkable and laboratory parameters were within the reference
ranges, with the exception of a low albumin level (3 g/dL). Nonsteroidal anti-inflammatory
drug use, infectious disorders, and gluten and lactose intolerance were ruled out.
Previous upper and lower endoscopy with biopsies and abdominal cross-sectional imaging
did not reveal any lesions. A second ileocolonoscopy showed subtle ileal erosions
with histopathological evaluation that was inconclusive for Crohn’s disease. It was
decided that SBCE with CapsoCam SV-1 should be performed.
The patient swallowed the capsule as directed and retrieved it 52 hours later. The
wire-free capsule system was then inserted into the bench storage device and the on-board
data were downloaded using a standard computer. The SBCE video record provided high
quality, four-quadrant images (n = 3650) for the whole duration of the recording (total
recording duration 14 hours; transit time, gastric 57 minutes, small bowel 202 minutes).
An impressive number of erosions (n = 27) and ulcers (n = 97) from the distal duodenum
to the terminal ileum were observed ([Figs. 1 – 4]; [Video 1]). All lesions occurred among normal-appearing mucosa, with no trace of strictures.
The 360° panoramic view, together with the high rate of recorded frames, allowed for
a clear characterization of each lesion. A remarkable number of frames were recorded
per erosion or ulcer (mean 7 frames [range 2 – 14] per erosion, 9 frames [range 3 – 33]
per ulcer), and distinct perspectives of lesions were captured by each camera (mean
number of cameras capturing the lesion, 1.5 [range 1 – 3]). This feature represents
a tangible improvement in lesion classification and differential diagnosis (i. e.
for classification of the lesion type or distinction between different or redundant
findings). Based on these findings, the diagnosis of extensive small-bowel Crohn’s
disease was made and the patient improved with specific therapy.
Fig. 1 Two superficial jejunal ulcers in the second and fourth quadrants.
Fig. 2 Multiple superficial ulcers in the proximal ileum, quadrants 1 – 3.
Fig. 3 Two deep ulcers (quadrants 2 and 4) and one small, superficial ulcer (quadrant 3)
in the distal ileum.
Fig. 4 Large and deep ulcer of the distal ileum (quadrant 3).
CapsoCam SV-1 short video of the distal ileum, characterized by several ulcers of
different sizes and depths in a patient with suspected Crohn’s disease.
This case is interesting for several reasons. First, an unusual case of extensive
luminal small-bowel Crohn’s disease was identified in a patient with a long history
of chronic, nonbloody diarrhea. Second, the report adds to the growing literature
on advanced endoscopic imaging techniques for the small bowel [1]
[2]
[3]. Finally, the performance of a new standard for SBCE has been described, providing
multiple, high resolution images and visualizing different aspects of each lesion,
which have the potential to improve both the diagnostic yield and the confidence of
the operator in assessing the diagnosis and the differential diagnosis.
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