Recovery from Acute Infantile Non‐lipoid Reticulo‐endotheliosis (?Letterer‐Siwe Disease)

Summary 1. A case of non‐lipoid reticulo‐endotheliosis involving lymph glands, bones and probably liver and spleen in a 5½ month boy is describes. The boy made a complete recovery which did not seem to have been influenced by treatment. He is now nearly 7 years old and is well. 3. At no time did his identical twin exhibit any symptoms of the disease.