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  • Title: [A case of true human tail accompanied with spinal lipoma].
    Author: Matsuo T, Koga H, Moriyama T, Yamashita H, Imazato K, Kondo M.
    Journal: No Shinkei Geka; 1993 Oct; 21(10):925-9. PubMed ID: 8413807.
    Abstract:
    Human tails have been attributed to a disturbance in fetal tail regression which normally occurs at the gestation age of about 6 weeks. To date, more than 100 cases of human tails have been reported. However, reports of true human tails, which involve the coccygeal vertebrae, are rare. We recently encountered a patient with a true human tail which involved the coccygeal vertebrae and was accompanied by lumbar spinal lipoma and spina bifida. A four-year-old boy was brought to our clinic with complaints primarily of painful mass. The boy had no neurological abnormalities. Physically, a tail bone projected, slightly in the lumbar area, with a linear depression in the center. A hard tail bone was palpable subcutaneously. A soft mass was palpable in the lumbar region, which was accompanied by hemangioma on the superficial layer of the skin in this region. On X-ray films, the tail bone lacked the normal curvature and it projected linearly in the posterior direction. CT scans revealed spina bifida at the level below L2. MRI disclosed spina bifida (at the level below L2), spinal lipoma and a tethered cord. During surgery, the tail bone was first resected over a distance of one and a half vertebral bodies. The lumbar tumor, which continued into the spinal canal, was removed as completely as possible after incision of the dura mater. To free the tethered cord, the tensioned, hypertrophic filum terminale was dissected. Although the morphological diagnosis of this condition is easy, the high incidence of complication by other anomalies makes it essential to perform thorough preoperative examinations with CT and MRI.(ABSTRACT TRUNCATED AT 250 WORDS)
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