Rare Presentation of a Rare Orthopedic Pathology: Erdheim Chester Disease

In 1930, William Chester and pathologist Jakob Erdheim discovered the pathology currently known as Erdheim Chester disease. There are only approximately 249 histologically confirmed patients to have been diagnosed with this disease as noted in the medical literature. We describe a case report of an indolent form of Erdheim Chester Disease (ECD), in a patient in whom the disease has been present for approximately 14 years. Despite widespread sclerosis of long bones in the extremities, the patient has no complaints of peripheral bone pain. Although, the patient does have involvement of the jaw with subsequent loss of multiple teeth secondary to the facial manifestations of the disease. This is also the first patient have the disease incidentally discovered after an ACL injury, and the first ECD patient to receive an ACL reconstruction.