Fetus in fetu - a rare developmental anomaly

Area of Science:

• Medical Imaging
• Pathology
• Surgical Oncology

Background:

• Fetus in fetu is a rare congenital anomaly where a malformed fetus is found within the body of its twin.
• It typically presents as an abdominal calcified mass in neonates or infants, often mimicking a teratoma.

Observation:

• An 8-month-old female infant presented with abdominal distension.
• Imaging studies, including ultrasonography and computed tomography, indicated a mass consistent with fetus in fetu, distinguishing it from a teratoma.

Findings:

• Surgical exploration and complete resection of the abdominal mass were performed.
• Radiographic and pathological examination of the resected specimen confirmed the presence of a fetus in fetu, characterized by a rudimentary vertebral column.

Implications:

• This case highlights the importance of advanced imaging in differentiating fetus in fetu from other abdominal masses.
• Successful surgical management is crucial for favorable outcomes in affected infants.
• Further research into the embryological origins and optimal diagnostic strategies for fetus in fetu is warranted.