ReviewMedicine2026
"Pseudo coffee bean sign" without sigmoid volvulus: A case report and literature review.
Review in Medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
Abstract
rationaleSigmoid volvulus is a common acute abdominal condition in clinical practice. Delayed treatment can lead to serious consequences. Abdominal plain radiography is an important diagnostic modality for this condition, with the "coffee bean sign" representing its classic radiological finding. However, a "pseudo coffee bean sign" without evidence of intestinal obstruction may also be encountered clinically, necessitating further differential diagnosis. PATIENT CONCERNS: We report a 72-year-old male admitted with "left lumbar pain lasting 8 hours." Comprehensive computed tomography (CT) revealed left ureteral calculi with associated left-sided hydronephrosis. Urinalysis showed 67 white blood cells per microliter (reference range: 0-15/μL). DIAGNOSES: Left ureteral calculi with hydronephrosis and urinary tract infection.
interventionsThe patient underwent left ureteroscopic lithotripsy (URS). On postoperative day 1, a follow-up kidney-ureter-bladder (KUB) radiograph revealed the sigmoid colon dilation, consistent with the "coffee bean sign." The radiology department reported this as a critical finding. OUTCOMES: Further comprehensive abdominal CT revealed sigmoid colon redundancy and gaseous distension, with no evidence of sigmoid volvulus or necrosis. At the 1-month follow-up after discharge, the patient remained asymptomatic. LESSONS: The "coffee bean sign" is a classic radiological finding in sigmoid volvulus; however, it may also be present in a small number of patients with sigmoid colon redundancy. When plain abdominal films are inconclusive, CT or barium enema should be promptly performed to rule out intestinal obstruction.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.