Congenital self-healing reticulohistiocytosis (also known as "Hashimoto–Pritzker disease," and "Hashimoto–Pritzker syndrome") is a condition that is a self-limited form of Langerhans cell histiocytosis.
Symptoms
Non-specific inflammatory response, which includes fever, lethargy, and weight loss. This is suspected of being a genetic disorder, and as the name implies, is self healing.
References
Congenital self-healing reticulohistiocytosis Wikipedia(Text) CC BY-SA