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The neck, Thoracic Inlet and Outlet, the Axilla and Chest Wall, the Ribs, Sternum and Clavicles.
Published in Fred W Wright, Radiology of the Chest and Related Conditions, 2022
Multicentric reticulohistiocytosis is a rare systemic disorder which primarily affects the skin and synovium causing a severe erosive arthritis, but may also cause soft tissue masses in the chest wall. About 20 to 30% of affected patients have associated malignancy, including bronchial tumours. Kamel et al. (1996) described an 8 × 4 cm mass in the left serratus anterior muscle which gave rise to intense peripheral enhancement.
Nonpigmented skin lesions
Published in Giuseppe Micali, Francesco Lacarrubba, Dermatoscopy in Clinical Practice, 2018
Pietro Rubegni, Linda Tognetti, Filomena Mandato, Michele Fimiani
Reticulohistiocytoma usually shows a yellowish background, or a uniformly yellow central area and a pink-orange color in the periphery. Light-brown globules15 or “clouds of paler yellow deposits”18 can be present, along with branched18 vessels located at the periphery of the lesion (Figure 25.4). Brownish globules correspond to dots of hemosiderin in the upper dermis.15 In many cases, reticulohistiocytoma shows aspects similar to the juvenile xanthogranuloma, such as the sign of the setting sun;19 hence the differential diagnosis is usually difficult. Notably, three different reticulohistiocytoma patterns (brown reticular structures, central white scar-like patches, and the “setting-sun” pattern) were described in the same patient with multicentric reticulohistiocytosis.20 In addition, a new dermatoscopic feature, characterized by central white-grayish area and white-pinkish streaks situated at the periphery, without dilated vessels, has been reported by de Oliveira and colleagues.21
Musculoskeletal (including trauma and soft tissues)
Published in Dave Maudgil, Anthony Watkinson, The Essential Guide to the New FRCR Part 2A and Radiology Boards, 2017
Dave Maudgil, Anthony Watkinson
Multicentric reticulohistiocytosis results in widespread, symmetrical and progressive arthropathy, beginning in the wrists and interphalangeal joints, and spreading to the metacarpophalangeal joints. Erosions tend to be large and punched out. Arthritis mutilans may result.
Multiple subcutaneous xanthogranuloma at juxta-articular sites with bone cystic changes resembling rheumatoid arthritis: A case report
Published in Modern Rheumatology, 2018
Shoichi Kaneshiro, Kenrin Shi, Kosuke Ebina, Masao Yukioka, Hideki Yoshikawa, Norikazu Murata
From the appearance of multiple subcutaneous nodules at juxta-articular sites, the differential diagnoses should include rheumatoid nodules, multicentric reticulohistiocytosis and pigmented villonodular synovitis. Rheumatoid nodules are often bony hard [7], but the nodules in our case were all soft to elastic soft. Multicentric reticulohistiocytosis, often resembling and misdiagnosed as RA, manifests multiple joint destruction including distal interphalangeal joints [8]. Although the nodules mostly occurred near the joints in our case, joint destruction was not recognized either radiographically or intra-operatively. The lesions of this case had some similarities to pigmented villonodular synovitis, but neither did they locate in synovial-lined tissues, nor have hemosiderin deposition [9]. Finally, these differential diagnoses were all denied by histopathological findings.