Reticulosis is a medical term used to describe a rare condition in which there is an excessive growth of cells in the reticuloendothelial system. This disease can affect various organs such as the liver, spleen, and lymph nodes. However, there are several other names for this disease including histiocytosis, Langerhans cell histiocytosis (LCH), and Erdheim-Chester disease. Although they are all classified as reticuloses, they have different subtypes, symptoms, and treatments. Due to the rarity of these diseases and their overlapping symptoms, it is crucial for medical professionals to make an accurate diagnosis before commencing treatment.