. Tumours, innocent and malignant; their clinical characters and appropriate treatment. spina bifida occulta; the skin covering the de-fective spines presented the hair-field usual in these the tissues immediately over the stunted spinous pro-cesses a dermoid was found containing sebaceous materialand hair (Fig. 222). It is very rare to find dermoids within the spinal canal. 444 DERMOIDS An interesting instance of this has been recorded by HaleWhite. It grew in the thoracic region of the spine, andproduced paraplegia. Laminectomy was performed on thepatient, a man 26 years of age, but
. Tumours, innocent and malignant; their clinical characters and appropriate treatment. spina bifida occulta; the skin covering the de-fective spines presented the hair-field usual in these the tissues immediately over the stunted spinous pro-cesses a dermoid was found containing sebaceous materialand hair (Fig. 222). It is very rare to find dermoids within the spinal canal. 444 DERMOIDS An interesting instance of this has been recorded by HaleWhite. It grew in the thoracic region of the spine, andproduced paraplegia. Laminectomy was performed on thepatient, a man 26 years of age, but the operation was notsuccessful. Faulty coalescence of the cutaneous covering of the backoften occurs over the lower sacral vertebrae, and gives rise tosmall congenital sinuses known as postanal dimples and coccygeal sinuses. These recesses are lined with skin fur-nished with hairs, sebaceous and sweat- eflands. Sometimesthey measure 10 mm. in depth. As a rule they are single,and often accompany lumbo-sacral spinal bifida. Thoughmost commonly seen over the coccygeal or the last two. Fig. 222.—Section of three thoracic vertebras with a small dermoid situatedover two stunted spinous processes. sacral vertebrae, I have seen them as high as the fourthlumbar vertebra, and always exactly in the middle line. These, dimples are interesting, for—as will be shown after-wards—in many situations where sequestration dermoidsoccur, similar cutaneous recesses are also seen. An examina-tion of such a sinus serves to show that if its external orificebecame occluded, without the deeper parts becoming obliter-ated, we should have the germ of a dermoid, for thenumerous glands in the walls would be active, and theirsecretion, with the shed epithelial scales and hairs, wouldsoon cause it to enlarge and assume such proportions as torender it recognizable as a tumour. The coccygeal sinuses are sometimes troublesome, as hairand dirt accumulate in them and lead to suppuration. Clini- SCROTAL DERM
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectneoplasms, bookyear19
