This is a case report with serial imaging showing progression of diffuse osteonecrosis in a patient after a diagnosis of secondary hemophagocytic lymphohistiocytosis (HLH). While bone marrow involvement in HLH has been long noted at histological evaluation and is itself one of the diagnosis criteria, to the best of our knowledge, there has been no previous publication addressing osseous image f...

Hemophagocytic lymphohistiocytosis (HLH) is a syndrome characterized by severe hyperinflammation due to an overwhelming ineffective immune response to different triggers. Most important symptoms are fever, hepatosplenomegaly and cytopenias. Biochemical signs include elevated ferritin, hypertriglyceridemia and low fibrinogen. Hemophagocytosis in the bone marrow is a hallmark of this syndrome. Ba...

Patients with rheumatoid arthritis are at increased risk of hematological malignancies, especially when exposed to immunosuppressive therapy. The mechanisms of lymphomagenesis remain poorly understood but factors implicated include high disease activity, exposure to antitumoral necrosis factor medications, and Epstein-Barr virus infection. Lymphoid malignancies of T-cell origin are uncommon in ...

We report a case of Epstein-Barr virus (EBV) primo infection with the development of successive infectious mononucleosis, hemophagocytic lymphohistiocytosis, and B-cell lymphoproliferative disorder in a patient treated with azathioprine for Crohn's disease. This case report suggests that specific EBV-related clinical and virological management should be considered when treating a patient with i...

Hemophagocytic lymphohistiocytosis--which is associated with a variety of infections, malignant neoplasms, autoimmune diseases, and immunodeficiencies--is an uncommon syndrome with a rapidly fatal outcome. We describe the first case of hemorrhagic fever with renal syndrome due to Hantaan virus presenting with reactive hemophagocytosis.

Hemophagocytic lymphohistiocytosis (HLH) is a rare inflammatory condition with tissue destruction due to abnormal immune activation. We present a series of 2 cases of cytomegalovirus-induced HLH in children during maintenance chemotherapy for acute lymphoblastic leukemia. These cases emphasize the importance of considering secondary HLH in this high-risk subset of pediatric patients.

Hemophagocytic lymphohistiocytosis (HLH) is a rare hyperinflammatory syndrome, characterized clinically by fever, splenomegaly, cytopenia, and high ferritin. Infectious causes have been associated with secondary HLH, with viruses being the most common. We report a case of Mycobacterium avium complex-associated HLH in a sickle cell anemia patient. To the best of our knowledge, this association h...

A 36-year-old man with fever and pancytopenia due to Hemophagocytic Lymphohistiocytosis is reported. The patient was started on the HLH-94 based treatment. Two weeks after the initiation of therapy the patient's pancytopenia had resolved and he was discharged to complete treatment as an outpatient. The initial clinical presentation, diagnostic criteria, pathophysiology and treatment will be dis...

A young woman presented with panniculitis, fever and blood cytopenias, later going on to develop hemophagocytic lymphohistiocytosis. Further evaluation revealed the presence of subcutaneous panniculitis like T-cell lymphoma (SPTCL). With this case we present an approach to panniculitis, a commonly encountered skin manifestation with a wide range of differentials. We discuss the close similarity...

Hepatosplenic T-cell lymphoma (HSTCL) is a rare non-Hodgkin lymphoma, marked by liver, spleen, and bone marrow sinusoidal infiltration, with an aggressive clinical course, which represents a difficult diagnostic task for clinicians and pathologists. Another equally severe and challenging condition is the hemophagocytic lymphohistiocytosis (also called hemophagocytic syndrome [HS]), which is oft...