PubMed · 646714
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R E Fechner. 1978. Pathologic quiz case 2.. https://pubmed.ncbi.nlm.nih.gov/646714/
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The pathogenesis of retrorectal cystic hamartomas in the presacrococcygeal space, while known to be related to embryological remnants of the caudal region, is controversial. These lesions are rarely found in children; in the early stages of their development they may be symptomless. Diagnosis is usually made when the tumor is large enough to cause pain or intestinal obstruction, or when it becomes infected. A 2-month-old girl with a retrorectal cystic hamartoma initially treated as a perianal abscess is presented.
The authors found with neonatal ultrasound screening a cyst in the epigastrium sized 45 x 18 x 36 mm. The newborn was operated at age of 7 days. The cyst was in the right lobe of the liver and after extirpation healed.