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*Corresponding Author: Valentina Broshtilova, Department of Infectious Diseases, Parasitology and Dermato-venereology, Faculty of Medicine, Medical University “Prof. Dr Paraskev Stoyanov”, Varna, Bulgaria
Citation: Kantardjiev V, Beshanska-Pedersen B, Obreshkova O, Broshtilova V, Dermatomyositis-Like Multicentric Reticulohistiocytosis: A Clinical Clue to Verify Underlying Malignancy. J Clinical Research and Reports, 4(1); DOI:10.31579/2690-1919/070
Copyright: © 2020 Broshtilova V. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Received: 11 March 2020 | Accepted: 14 April 2020 | Published: 04 May 2020
Keywords: multicentric reticulohistiocytosis; paraneoplastic syndrome
Herein, an otherwise healthy 63-year-old Caucasian woman with a three month-history of progressive symmetrical swelling and of the fingers, lumbal and abdominal pain, proximal muscle weakness, and heliotropic rash resembling V- neck, histologically verified as multicentric reticulohistiocytosis (MRH), is presented. Multiple computer tomography scans failed to detect ovarian cancer despite elevated Ca 125, however, it was verified six months later by magnetic resonance investigation. Multicentric reticulohistocytosis (MRH) is a rare systematic disease that targets skin, mucoses and synovium, resulting in skin nodules, mucosal lesions and deforming painful mutilating polyarthritis. Twenty – five percent of all patients are associated with internal malignancies, hence, MRH paraneoplastic nature remains extremely controversial. Our case showed a peculiar dermatomyositis-like clinical subtype, which we consider suggestive for verification of an underlying malignancy.
Multicentric reticulohistocytosis (MRH) is first described by Weber and Freudenthal in 1937. Golz and Laymon coined the term MRH 1, while 15 years later Barrow et al. provided the first working definition of the non-Langerhans histiocytosis 2. Approximately 300 cases of MRH, mostly in Western countries and Japan, are reported worldwide 3. MRH is more common in females (2-3:1) 4 with mean presentation in the 4th and 5th decade. Anecdotal pediatric cases have also been described 5.
A MRH case, clinically presented with heliotropic erythema, mimicking dermatomyositis, in association with an underlying ovarian cancer is, herein, described.
An otherwise healthy 63-year-old woman presented with a three-month history of progressive swelling, stiffness of the fingers on both hands, lumbal and abdominal pain, and proximal muscle weakness. The patient reported weight loss, malaise and abdominal pain as first symptoms. On physical examination a heliotropic poikilodermic exanthema with peripheral telangiectasias were seen on her presternal area (Fig. 1).
Reddish-brown papules and nodules were regularly distributed on the dorsum of the fingers. Diffuse erythematous macules were noticeable on the abdominal wall. Coral beads around the nail matrix were also observed (Fig. 2).
The diagnostic presumption of dermatomyositis, based on heliotropic erythema, polyarthritis, and muscle weakness, was ruled out upon histological verification that showed hyperkeratosis, regular acanthosis, a dense infiltrate of histiocytes and multinuclear cells with abundant "ground glass" cytoplasm (Fig.3) with fine periodic acid-Schiff– positive granules and CD 68 positivity (Fig.4). The nuclei of the giant cells have been arranged aligned on the periphery or clustered in the center. The diagnosis of multinucleated reticulohistiocytosis was concluded.
A full body work-up ruled out infectious, immunological and metabolic conditions. Ultra sound and computer tomography investigations of chest, abdomen, pelvis and lungs showed no pathological changes.
The patient was started with a combined quadruple regimen of hydrocortisone 5mg daily, alendronate 70 mg weekly, methotrexate 7.5 mg weekly, and folic acid 10 mg weekly22, 23. Reduction of finger edema, alleviation of arthralgias and increased quality of life were registered at the first-month follow-up. A persistent monitoring of CA 125 was performed during the next six months with no significant change in values. Several obstetric consultations were also done, none verifying an underlying malignancy. The third-month follow-up sonography and computer tomography scan were negative, too. At the six-month check-up the patient reported an abdominal pain. The third sonography suspected ovarian cancer, which was verified by magnetic resonance. A radical hysterectomy with wide lymph dissection was performed.
MRH is a rare systematic disease that targets skin, mucoses and synovium, resulting in subcutaneous nodules, mucosal lesions and deforming painful mutilating polyarthritis 6. The diagnosis is extremely challenging and based entirely on histopathological findings. No pathognomic clinical features exist, perhaps with the exception of coral beads around the nail matrix, which have been considered more specific 2,4. The poikilodermic presternal erythema and heliotropic rash seen in our patient were suggestive of dermatomyositis. The dermatological symptoms corresponded well with symmetrical joint involvement and consumptive syndrome. Only the histological verification was able to conclude MRH, thus proving the observations of other authors who outline dermatomyositis-like changes in MRH as a specific clinical subtype 7.
MRH pathogenesis remains obscure. It is considered a reactive proliferation of tissue macrophages due to unknown and hardly-to-differentiated triggers. TNF alpha and other inflammatory cytokines are highly expressed in the synovium and synovial fluid of affected joints in patients with MRH 8.Quantative amounts of pro-inflammatory cytokines are elevated in the synovial fluid, among them- TNF-alpha, IL6, IL12, and IL1-beta and these findings have important implications from a therapeutic standpoint, as also supported by the reported benefit of TNF-alpha inhibitors 9. Pro-inflammatory cytokines are likely produced by synovial fluid macrophages and may represent a common mechanism with rheumatoid arthritis. More recent data support that synovial fluid macrophages may differentiate into osteoclasts following RANKL pathway activation or macrophage colony stimulating factor 10.
Paraneoplastic nature of the disease is highly controversial. The malignancy-associated MRH varies between 25-31%.11 Most common underlying neoplasms are: pancreatic adenocarcinoma, squamous cell carcinoma of the lung, metastatic melanoma, papillary serous carcinoma of endometrium, recurrent breast carcinoma 12. By 73% of the patients MRH diagnosis preceded the associated tumor 13. Herein, we speculate on the dermatomyositis-like peculiar MRH clinical presentation as a validator of the paraneoplastic nature of the disease. We would like to propose dermatomyositis-like MRH as a prognostic clue for an underlying malignancy.
No comprehensive therapeutic approach has been recently worked out. Although MRH has the tendency to self-resolve in an average of 8 years, treatment must be started early to avoid sequelae, mainly in joints with severe deformities and daily life activity impairment 14. The latest guidelinesproposed methotrexate as the most effective initial disease-modifying antirheumatic drugs 15. It controls arthritis symptoms in 28
MRH is a challenging diagnosis with peculiar clinical and histopathological features. The very few cases published worldwide do not give enough evidence of the scientific community to build a reasonable pathogenetic concept and sensible hypothesis of the common disease associations. Our clinical observation proved the already-described correlation of dermatomyositis-like MRH clinical subtype with an underlying malignancy. Therefore, we would like to suggest MRH dermatomyositis-like clinical subtype as a validator of the paraneoplastic nature of the disease.
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