Question: Can you identify this condition?

[摘要] Fibrous lesion with central pit and hyperpigmentation in the lumbosacral area with surrounding hypertrichosis.Magnetic resonance image of the lumbosacral area: A) Posterior elements of the spine are not closed at the S1 level, but are instead fixed to the

[学科分类] 卫生学

[关键词] friction factors;wind measurements;tsunami