Dysphagia caused by a fetus-in-fetu in a 27-year-old man

M G Massad1, L Kong, E Benedetti

  • 1Department of Surgery, The University of Illinois at Chicago, 60612, USA. mmassad@uic.edu

Insights

A rare case of fetus-in-fetu caused a blockage in the esophagus, leading to swallowing difficulties. This highlights the need to consider retroperitoneal masses in diagnosing such symptoms.

Area of Science:

  • Medical Case Study
  • Surgical Pathology
  • Gastroenterology

Background:

  • Fetus-in-fetu is a rare congenital anomaly where a malformed fetus is found within the body of its twin.
  • Mechanical obstruction of the esophagus is typically caused by other conditions, making this presentation highly unusual.

Observation:

  • A 27-year-old male presented with progressive dysphagia (difficulty swallowing).
  • Imaging revealed a retroperitoneal cystic mass containing a fetus-in-fetu.
  • The mass, present since childhood, had recently caused esophageal compression.

Findings:

  • The fetus-in-fetu within the retroperitoneal cyst was identified as the cause of distal esophageal obstruction.
  • Surgical intervention was necessary to relieve the mechanical blockage.

Implications:

  • This case expands the known clinical manifestations of fetus-in-fetu.
  • It suggests that fetus-in-fetu should be included in the differential diagnosis for retroperitoneal masses presenting with esophageal compression or dysphagia.

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