▁earned ▁his ▁medical ▁doctor ate ▁at ▁Paris , ▁where ▁he ▁was ▁a ▁student ▁of ▁Charles - Pierre ▁Den on v ill iers ▁( 1 8 0 8 – 1 8 7 2 ) ▁and ▁August e ▁N él aton ▁( 1 8 0 7 – 1 8 7 3 ). ▁In ▁ 1 8 8 3 ▁he ▁became ▁a ▁professor ▁at ▁the ▁Fac ulté ▁de ▁Mé dec ine ▁de ▁Paris , ▁and ▁in ▁ 1 8 9 5 ▁became ▁a ▁member ▁of ▁the ▁Academy ▁of ▁Sciences . ▁Later ▁in ▁life ▁he ▁became ▁interested ▁in ▁politics , ▁being ▁chosen ▁as ▁sen ator ▁from ▁the ▁department ▁of ▁G ers ▁in ▁ 1 9 0 6 . ▁ ▁L annel ong ue ▁is ▁remembered ▁for ▁his ▁work ▁involving ▁b one ▁dise ases , ▁especially ▁o ste omy el itis ▁and ▁b one ▁t uber cul osis . ▁In ▁ 1 8 9 2 ▁he ▁performed ▁the ▁first ▁c ran ie ct omy ▁for ▁c ran ios yn ost osis , ▁an ▁operation ▁that ▁involved ▁correction ▁of ▁a ▁sag itt al ▁syn ost osis . ▁He ▁is ▁also ▁cred ited ▁for ▁introdu cing ▁a ▁method ▁of ▁treatment ▁for ▁syn ov ial ▁t uber cul osis ▁through ▁the ▁use ▁of ▁ch lor ide ▁of ▁z inc ▁in jections . ▁ ▁In ▁ 1 9 1 1 ▁he ▁founded ▁the ▁Méd aille ▁internationale ▁de ▁ch ir urg ie ▁( Foundation ▁L annel ong ue ) ▁in ▁memory ▁of ▁his ▁wife , ▁Marie ▁L annel ong ue ▁( née ▁C