Malignancy-associated multicentric reticulohistiocytosis
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Updated: Jun 17, 2026

Wild-type Blocking PCR Combined with Sanger Sequencing for Detection of Low-frequency Somatic Mutation
Published on: August 23, 2024
Boutros El-Haddad1, Dalia Hammoud, Timothy Shaver
1Internal Medicine Department, Kansas University School of Medicine, Wichita, KS 67206, USA.
Abstract:
Multicentric reticulohistiocytosis (MR) is a rare systemic disorder of unknown etiology. Up to 25% of patients with MR have associated malignancies. We are reporting a case of a patient with MR who initially had an excellent clinical response to oral methotrexate and prednisone. Subsequent attempts of prednisone taper failed because of disease flare-up. Workup for associated malignancy revealed localized squamous cell carcinoma of the lung. The tumor was resected; methotrexate and prednisone were tapered and discontinued with complete remission of MR. A review of literature and the new advances and treatment modalities for MR is provided.
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