Progressive Multicentric Reticulohistiocytosis

Progressive multicentric reticulohistiocytosis.

Organizing pneumonia associated with multicentric reticulohistiocytosis

Organizing pneumonia (OP) is a clinicopathological entity that occurs idiopathically or in association with several conditions such as connective tissue diseases. Multicentric reticulohistiocytosis (MRH) is a systemic disease characterized by polyarthritis and mucocutaneous lesions, but lung involvement is uncommon. We report a patient with MRH associated with OP. This case may be of interest w...

Multicentric Reticulohistiocytosis with Dermatomyositis-like Eruptions

A 68-year-old man presented with polyarthritis, proximal muscle weakness, and erythema of the face, arms, neck, and anterior chest that resembled the V-neck sign. Initially, dermatomyositis (DM) was considered because of the erythema, polyarthritis, and muscle weakness. He also had mediastinal and hilar lymphadenopathy on contrast-enhanced computed tomography. Unexpectedly, a biopsy of the fore...

Multicentric Reticulohistiocytosis Treated Successfully with Etanercept

Multicentric reticulohistiocytosis (MRH) is an uncommon systemic disease of unknown aetiology, which is characterized by the presence of papulonodular lesions, and is caused by the proliferation of histiocytes associated with arthritis. There are only just 200 cases described in the scientific literature. It can behave like a paraneoplasia and may be malignant in a quarter of the patients. We w...

Treatment of multicentric reticulohistiocytosis with etanercept.

An otherwise healthy 46-year-old man presented with a 1-year history of an ill-defined acral eruption that had evolved over several weeks into reddish-brown papules and nodules, together with a progressive inflammatory polyarthritis. Skin lesions ranging from several millimeters to several centimeters in diameter were present on the dorsal and palmar aspects of the hands (Figure 1) and on the f...