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Figure 4: Spinal cord with intact arachnoidal layer (a) Exposed surface of the intra-medullary tumor. (b) A conventional myelotomy yields the cut-open cord surface similar to two triangles abutting at a common base. (c) Exposed tumor surface area may be measured mathematically as sum of these two triangles with base (b) and height (h), h=height of one triangle or half the length of myelotomy. With our technique, we have noticed a gain in the width of myelotomy twice (2b) as compared to the conventional approach. (d and e) Early visualization of tumor-cord interface at better viewing angles. (f)

Figure 4: Spinal cord with intact arachnoidal layer (a) Exposed surface of the intra-medullary tumor. (b) A conventional myelotomy yields the cut-open cord surface similar to two triangles abutting at a common base. (c) Exposed tumor surface area may be measured mathematically as sum of these two triangles with base (b) and height (h), h=height of one triangle or half the length of myelotomy. With our technique, we have noticed a gain in the width of myelotomy twice (2b) as compared to the conventional approach. (d and e) Early visualization of tumor-cord interface at better viewing angles. (f)