Human tails and pseudotails

Area of Science:

• Human embryology
• Developmental abnormalities
• Pediatric surgery

Background:

• Human tails are rare congenital anomalies, often presenting as lumbosacral protrusions.
• Distinguishing true tails from pseudotails is crucial for appropriate management.
• Understanding the embryological origins aids in classifying these lesions.

Observation:

• A case of a true tail in a 2-week-old infant is presented.
• Review of 33 cases reveals true tails contain adipose tissue, muscle, nerves, and skin, lacking bone or spinal cord.
• True tails are mobile, can measure up to 13 cm, and occur more frequently in males.

Findings:

• True tails result from the retention of embryonic tail remnants.
• Pseudotails encompass diverse lesions, with vertebral anomalies being the most common cause.
• Other pseudotail causes include lipomas, teratomas, gliomas, and parasitic fetuses.

Implications:

• Surgical excision of true tails is typically curative with no residual effects.
• Accurate diagnosis of pseudotails is essential due to varied underlying pathologies.
• Further research can refine diagnostic criteria and treatment strategies for these rare conditions.