Celiac artery compression syndrome Celiac artery compression syndrome also known as MALS (median arcuate ligament syndrome), "celiac artery compression", "celiac axis syndrome" or "Dunbar syndrome", is

Secondary hemophagocytic lymphohistiocytosis Secondary hemophagocytic lymphohistiocytosis (secondary HLH) also known as acquired hemophagocytic lymphohistiocytosis (acquired HLH) is a rare life-threatening intense immune activation syndrome in which

Familial hemophagocytic lymphohistiocytosis Familial hemophagocytic lymphohistiocytosis (FHL) also called primary hemophagocytic lymphohistiocytosis is a rare, genetic inborn errors of immunity causing aggressive life-threatening intense immune

Hemophagocytic lymphohistiocytosis Hemophagocytic lymphohistiocytosis also called HLH syndrome is a rare, life-threatening intense immune activation syndrome in which your body makes too many activated immune cells

Rosai Dorfman disease Rosai-Dorfman disease (RDD) also called Rosai-Dorfman-Destombes disease or sinus histiocytosis with massive lymphadenopathy (SHML), is a rare benign non-Langerhans cell histiocytosis which is

Erdheim–Chester disease Erdheim-Chester disease (ECD) also known as lipid granulomatosis or polyostotic sclerosing histiocytosis, is a rare slow-growing blood cancer, a non-Langerhans cell histiocytosis neoplasm, which

What is Langerhans cell histiocytosis Langerhans cell histiocytosis (LCH) previously referred to as Hand‐Schuller‐Christian disease, Letterer‐Siwe disease, eosinophilic granuloma or histiocytosis X, is a rare

What is eosinophilic granuloma Eosinophilic granuloma now known as Langerhans cell histiocytosis, is a group of rare disorders in which too many Langerhans cells (a

What is Mirizzi syndrome Mirizzi syndrome is a rare condition caused by the obstruction of the common bile duct or common hepatic duct by external

Patella fracture A patella fracture is a break in the patella or kneecap, the small bone that sits at the front of your knee (see