You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is According to Spetzler Martin Grading System for AV malformations, the score of a AV malformation of size 3-6 mm with deep venous drainage and location near internal capsule is and explain in detail?
Ans. (d) 5Ref: Sabiston 20th Edition Page 1904* Spetzler - Martin Grading System is used for AVM grading in Brain.* This grading helps in management also.* Grade varies from 1-5 based on the following points: Size, Location and Deep venous drainage.* Lower score has good outcome.* Grade 1 AVM would be considered as small, superficial, and located in non-eloquent brain, and low risk for surgery.* Grade 4 or 5 AVM are large, deep, and adjacent to eloquent brain.Spetzler - Martin Grading System: for AVM brain Characteristic of lesionNumber of pointsSizeSmall (diameter <3cm)1 Medium (diameter 3-6cm)2 Large (diameter >6cm)3EloquenceNo eloquent siteEloquent site (sensorimoter, language, or thalamus; internal capsule; brain stem; cerebellar peduncles, or cerebellar nuclei)01Pattern of venous drainageSuperficial only0Any deep1