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Case Report
Available online 27 March 2024
Cholecystoduodenal fistula: An unusual finding at autopsy
Fístula colecistoduodenal: Un hallazgo inusual en la autopsia
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Roger W. Byarda,b,
Corresponding author
roger.byard@sa.gov.au

Corresponding author at: Adelaide School of Biomedicine, Level 2, Room N237, Helen Mayo North, The University of Adelaide, Frome Road, Adelaide 5005, SA, Australia.
a Forensic Science SA, The University of Adelaide, Adelaide, South Australia, Australia
b The Adelaide School of Biomedicine, The University of Adelaide, Adelaide, South Australia, Australia
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Abstract

A 56-year-old man who collapsed in the street was found at autopsy to have died from mixed drug toxicity. Also present was a cholecystoduodenal fistula with an inflamed gallbladder adherent to an area of duodenal ulceration. The fistula was longstanding with significant fibrous scarring and predominantly chronic inflammation, but also with bacterial colonies, ulcer slough, and a polymorphonuclear leukocyte infiltration. It is uncertain whether the fistula originated from acute inflammation of the gallbladder with adherence to the duodenum (the most common aetiology) or from a penetrating duodenal ulcer, or from a combination of dual pathologies. Non-specific clinical features and illicit drug usage may have contributed to failure of diagnosis during life This case demonstrates significant rare pathology that may be more completely demonstrated with an internal autopsy examination.

Keywords:
Cholelithiasis
Gallbladder
Duodenal ulcer
Cholecystoduodenal fistula
Death
Resumen

En la autopsia se descubrió que un hombre de 56 años que se desplomó en la calle había muerto por toxicidad de una combinación de drogas. También se presentó una fístula colecistoduodenal con vesícula biliar inflamada adherida a un área de ulceración duodenal. La fístula era de larga data con importantes cicatrices fibrosas e inflamación predominantemente crónica, pero también con colonias bacterianas, esfacelos ulcerosos e infiltración de leucocitos polimorfonucleares. No se sabe si la fístula se originó por una inflamación aguda de la vesícula biliar con adherencia al duodeno (la etiología más común), o por una úlcera duodenal penetrante, o por una combinación de patologías duales. Las características clínicas no específicas y el uso de drogas ilícitas pueden haber contribuido al fracaso del diagnóstico durante la vida. Este caso demuestra una patología rara e importante que puede demostrarse más completamente con un examen de autopsia interna.

Palabras clave:
colelitiasis
vesícula biliar
úlcera duodenal
fístula colecistoduodenal
muerte

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