Abraham Ligtenstein sat for his medical finals in 1914. From 1915 to 1921 he was a health officer in the Dutch East Indies. He specialized in metabolic and tropical diseases and took his PhD degree in Amsterdam on 21 May 1924 for his PhD thesis on quantitative urobilene determination and blood degradation. He returned to the Dutch East Indies (Sumatra and Malang).
In 1930 Abraham Ligtenstein opened a practice as a physician for blood, stomach, intestinal, metabolic and tropical diseases at 12 Michelangelostraat in Amsterdam. He had another medical practice at 97 Sarphatistraat in Amsterdam. Abraham Ligtenstein was married to Marianne Sohlberg. The couple had two children. Their son Max perished in Bergen-Belsen, and the other child survived the war.
J.H. Coppenhagen, Anafiem Gedoe‘iem. Overleden joodse artsen uit Nederland 1940-1945 (Rotterdam 2000) 113-114
In addition, a Jokos file (number 6500) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for :
- securities or bonds. (W-claim, number C114/1353)
- valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 7628/16348)