Introduction Human tails are rare congenital malformations that describe protrusions
commonly located around the midline of the lumbosacral region covered by skin,
representing an embryonic remnant. Human tails are broadly classified into true and pseudo-
tails. The real ones represent the persistence of a remnant of the embryonic tail formed
between the fourth and eighth week of gestation. Presentation A male infant aged 42 days
presented to our institution with a tail-like structure that originated from the anal …

Human tails are rare congenital malformations that describe protrusions located around the
midline of the lumbosacral region covered by skin, representing an embryonic remnant [1–
3]. Human tails are broadly classified into true and pseudo-tails [2, 4]. The real ones
represent the persistence of a remnant of the embryonic tail formed between the fourth and
eighth week of gestation, being composed of adipose and connective tissue, blood vessels,
muscle and nerve fibers. Pseudo-tails are protuberances mainly containing adipose or …