Cutaneous rosai-dorfman disease is a distinct clinical entity

Facial cutaneous Rosai-Dorfman disease: a case report

BACKGROUND

Rosai-Dorfman disease (RDD) is a form of non-Langerhans cell histiocytosis in which the activated histiocytes of the lymph nodes and other organs begin to accumulate following excessive production. Bilateral, massive, and painless lymphadenopathy are classic presentations. Systemic RDD is already known to be a rare condition, but isolated cutaneous RDD is extremely rare. We presented a rare and unusual presentations of a disease.

CASE PRESENTATION

A 35-year-old Thai female with a 6-month history of a small acne-like lesion that rapidly progressed to 5 cm tumor-like lesions on the face within 3 months. Tissue histology showed a dense dermal infiltration of histiocytes with emperipolesis phenomenon. Immunohistochemistry was positive for S100 protein and CD68 and negative for CD1a. Oral prednisolone (50 mg/day) was initiated with a favorable outcome at the one-month follow-up. However, prednisolone yielded a partial response at 2-month follow-up, leading to application of another modality.

CONCLUSION

Although cutaneous Rosai-Dorfman disease is considered benign and well medical responded disease, patients with atypical presentation and rapid growing lesion may necessitate aggressive multimodal treatment.

Neuroimaging manifestations of paediatric histiocytoses

Histiocytoses are rare multi-system disorders marked by abnormal histiocyte cell proliferation, affecting children with diverse clinical presentations. Classified into five groups in 2016, including Langerhans-related (L), cutaneous (C), malignant (M), Rosai-Dorfman disease (R) and haemophagocytic lymphohistiocytosis (H), newer entities such as ALK-positive histiocytosis have also emerged, heralding the era of molecular (sub)classification. Common entities include Langerhans cell histiocytosis (LCH), Erdheim-Chester disease (ECD), Rosai-Dorfman disease (RDD) and haemophagocytic lymphohistiocytosis (HLH). This pictorial essay aids radiologists in recognising and differentiating paediatric histiocytoses based on unique neuroimaging features.

Rosai-Dorfman Disease of Nasal Soft Tissue: A Case Report

Rosai-Dorfman disease (RDD) is characterized by sinus histiocytosis with massive lymphadenopathy, and the tissue exhibits positive results for S100 and CD68. This lesion typically affects the lymph nodes and rarely involves the nasal soft tissues. This report aims to present a case of RDD involving the nasal soft tissues, presenting with nasal congestion and rhinorrhea as the primary complaints. The patient underwent surgery navigated by nasal endoscope did not report recurrence after operation.

The evaluation of IgG4 and IgG expression in cutaneous Rosai-Dorfman disease

OBJECTIVE

The authors investigated the expression of IgG4 and IgG in cutaneous Rosai-Dorfman Disease (CRDD) to further improve the understanding of this disease.

METHODS

The authors retrospectively reviewed the clinicopathological features of 23 CRDD patients. The authors diagnosed CRDD by the presence of emperipolesis and immunohistochemical (IHC) staining of histiocytes consisting of S-100(+)/CD68(+)/CD1a(-) cells. The expressions of IgG and IgG4 in cutaneous specimens were assessed by IHC (EnVision) and quantitatively calculated by a medical image analysis system.

RESULTS

All 23 patients, including 14 males and 9 females, were confirmed to have CRDD. Their ages ranged from 17 to 68 years (mean 47.91 ± 14.16). The most frequently affected skin regions were the face, followed by the trunk, ears, neck, limbs, and genitals. In 16 of these cases, the disease presented as a single lesion. IHC staining of sections showed that IgG was positive (≥ 10 cells/High-Power Field [HPF]) in 22 cases, while IgG4 was positive (≥ 10 cells/HPF) in 18 cases. Moreover, the IgG4/IgG proportion ranged from 1.7% to 85.7% (mean 29.50 ± 24.67%, median 18.4%) in the 18 cases.

STUDY LIMITATIONS

In the majority of studies, as well as in the current study, the design. RDD is a rare disease, so the sample size is small. In the next studies to come, the authors will expand the sample for multi-center verification and in-depth study.

CONCLUSION

The positive rates of IgG4 and IgG and the IgG4/IgG ratio assessed through IHC staining may be important in understanding the pathogenesis of CRDD.

A primary Rosai-Dorfman-Destombes disease of the scalp: case report and literature review

Background

Rosai-Dorfman-Destombes disease (RDD) was first described in 1965 as a benign histiocytic proliferative disorder of unknown cause. Cases of RDD limited to cutaneous tissue have been reported over the past few decades, but single cutaneous RDD of the scalp is rare.

Case presentation

We report a 31-year-old male with a lump on the parietal scalp without extranodal lesion lasting 1 month with gradual enlargement. The surgical incision ruptured with purulent after the first resection. Then the patient was treated with plastic surgery after disinfection and antibiotic treatment. Finally, he recovered well and discharged after 20 days.

Conclusions

RDD of the scalp is rare. Surgical incision can cure the lesion but it may become infected because of increased lymphocytic infiltration. Early diagnosis and differential diagnosis of RDD are necessary. For treatment, individualized therapy is critical to patient prognosis.

The value of 18F-FDG PET/CT in the systemic evaluation of patients with Rosai-Dorfman disease: a retrospective study and literature review

BACKGROUND

Rosai-Dorfman disease (RDD) is a rare form of non-Langerhans cell histiocytic disease. The aim of this study was to review the characteristics of RDD using ¹⁸F-FDG PET/CT and determine its efficacy in the disease management.

RESULTS

A total of 28 RDD patients underwent 33 ¹⁸F-FDG PET/CT scans for systematic assessment and follow-up. The common involved sites included the lymph nodes (17, 60.7%), upper respiratory tract (11, 39.3%), and skin (9, 32.1%). Five patients had more lesions detected in PET/CT images than in CT and/or MRI, including inapparent nodules (n = 5) and bone destruction (n = 3). After thorough treatment evaluation using PET/CT, the treatment strategies of 14 patients (14/16, 87.5%) were changed. Five patients underwent PET/CT twice during follow-up and the SUVs were significantly decreased (15.3 ± 3.4 vs. 4.4 ± 1.0, p = 0.02), which demonstrated disease improvement.

CONCLUSIONS

¹⁸F-FDG PET/CT contributed to displaying the holistic characteristics of RDD, in particular during initial assessment, treatment strategy adjustment, or efficacy evaluation, and could compensate for some disadvantages of CT and MRI images.

Clinical features, diagnosis, treatment and prognosis of otolaryngological extranodal sinus histiocytosis with massive lymphadenopathy (Rosai-Dorfman disease, RDD)

PURPOSE

To investigate the clinical features, diagnosis, treatment and prognosis of otolaryngological extranodal RDD.

METHODS

A retrospective analysis was performed on 16 patients who were initially diagnosed and treated with otolaryngological extranodal RDD in our hospital from January 2013 to January 2019.

RESULTS

There were 9 females and 7 males. The mean diagnostic age was 45.35. Nasal, laryngeal and otic RDD were, respectively, accounting for 56.25%, 31.25% and 12.5%. The median interval diagnostic time was individually 1, 0.5 and 0.2 year for nasal, laryngeal and otic RDD. The most common symptoms were separately progressive nasal congestion, dyspnea, otorrhea in nasal, laryngeal and otic RDD. 13 had cervical lymph node swelling on MRI. Surgery or postoperative radiotherapy were conformed. In the end, 14 patients with RDD survived. The survival rate is as high as 87.5%. One of them died of RDD in the fifth year. One case was lost to follow-up 2 years after treatment. Patients survive for at least 2 years and up to 9 years. There was no significant difference in life expectancy of extranodal RDD among different parts of ENT (P = 0.508 > 0.05). The average ages of laryngeal and nasal RDD were similar (P = 0.898 > 0.05). However, the age of both was significantly higher than ear RDD (P = 0.023 and 0.019 < 0.05).

CONCLUSIONS

The average diagnostic age was more than 20 years. Nasal RDD was the most common in this area. All laryngeal RDD had infiltrated subglottis. Functional surgery and postoperative radiotherapy can be used to achieve long-term remission and survival.

Intracranial Rosai-Dorfman Disease: A Case to Remember

Sinus histiocytosis with massive lymphadenopathy (SHML), an alternative term for Rosai-Dorfman disease (RDD), is a rare benign idiopathic immune-related lymphoproliferative condition. The central nervous system (CNS) has been documented to be involved in RDD, although lymph nodes are the organs that are most frequently and primarily associated with the disease manifestation. Nonetheless, CNS involvement in RDD is rare and poorly understood. As a result, there is a lack of a solid basis for therapeutic approaches for CNS involvement in RDD. Here, we present a case of RDD with cerebral involvement, a rare presentation of RDD with atypical symptoms. A brief assessment of the radiographic appearance, histological findings, and the peculiar manifestations of the disease is provided.

A Report of Rosai–Dorfman Disease in an Adolescent

Rosai–Dorfman disease (RDD) is a rare disease of unknown cause. It is a benign self-limiting condition characterized by the accumulation of activated histiocytes in the sinusoids of lymph nodes and/or extranodal tissues. Massive cervical lymphadenopathy as the initial manifestation tends to raise the initial odds in favour of a lymphoma, and thus reducing the threshold to performing a simple biopsy cannot be overestimated. Herein, we report a 13-year-old adolescent who presented with a progressive posterior left-sided neck swelling. Our diagnosis of RDD was established by demonstrating emperipolesis in histology and S100 positivity in immunohistochemistry as stated in the literature. Although the condition is known to be self-limiting, evidence from the literature and our case management shows that medical therapy can hasten remission in pediatric cases.

Primary cutaneous Rosai-Dorfman-Destombes disease with features mimicking IgG4-related disease: A challenging case report and literature review

Rosai-Dorfman-Destombes disease (RDD) is a rare histiocytic disorder affecting lymph nodes as well as extranodal sites. Although cutaneous involvement in RDD is common, primary cutaneous RDD is a distinct and not well-documented entity with unknown aetiology and non-specific clinicopathological features. We report a case of a 57-year-old patient, who presented with an indolent skin nodule in the left sub-nipple area. Surgical excision was performed. Histological examination concluded to the diagnosis of cutaneous RDD with histological features mimicking IgG4-related disease. The diagnosis of systemic RDD with cutaneous involvement was ruled out after exclusion of extracutaneous involvement. No recurrence or systemic progression was observed during follow-up. The diagnosis of primary cutaneous RDD is very uncommon and hence is challenging for pathologist and dermatologist especially with features of IgG4-related disease. Careful systemic and microscopic examinations help in establishing the appropriate diagnosis.

Primary Bone Lesions in Rosai–Dorfman Disease, a Rare Case and Diagnostic Challenge—Case Report and Literature Review

Rosai–Dorfman Disease (RDD), also known as sinus histiocytosis, is included in the group of rare diseases, characterized by proliferation and accumulation of histiocytes in the lymph nodes (lymphadenopathy), most often involving the cervical ganglion chains (nodal form). RDD bone involvement is rare, estimated at 10% of cases, but primary bone involvement (extranodal form), is very rare—2–8%. Usually they are solitary lesions, with multifocal primary bone manifestations being extremely rare. Histopathological analysis is of high value for a correct diagnosis. We present the case of a Caucasian woman, 42 years old, initially treated in another clinic, for an osteolytic tumor formation in the right tibial shaft. An excisional biopsy with bone trepanation was performed, the histopathological diagnosis being the chronic inflammatory tissue. The evolution was atypical, with tumor growth, extraosseous, subcutaneous. A needle biopsy was repeated in our clinic, the result being similar to the original one. Evolution of the tumor, and the radiological and imaging aspect (periosteal reaction, eroded and thin bone cortex) suggested a more aggressive disease, these being in inconsistency with the result obtained. The biopsy was repeated, as an excision type this time. The histopathological result and immunohistochemistry indicated an RDD primary bone lesion. Based on this result, and corroborated with the data from the literature, we initiated the surgical treatment, curettage and grafting with bone substitute plus safety osteosynthesis with locked plaque, the patient registering a favorable evolution. RDD primary bone lesions are in fact an atypical manifestation of a rare disease. The correct diagnosis is very difficult due to the non-specific imaging aspect. Histopathological examination errors, especially in the case of needle biopsies can lead to errors in diagnosis and treatment with negative results for the patient.

Rosai-Dorfman Disease of Bone and Soft Tissue

Context.—

Rosai-Dorfman disease is a rare histiocytic proliferative disorder of unknown pathogenesis that may be diagnostically difficult in extranodal sites. It is commonly an unsuspected diagnosis when arising in bone and soft tissue, especially when it presents without associated lymphadenopathy. Its variable clinical presentation and nonspecific imaging findings make the diagnosis quite challenging, particularly in small biopsies. The problem is compounded by its less-characteristic histomorphologic features in comparison with nodal disease. Awareness of the potential diagnostic pitfalls in Rosai-Dorfman disease of bone and soft tissue should raise the degree of diagnostic accuracy.

Objective.—

To review the clinical manifestations, imaging characteristics, and histomorphologic features of Rosai-Dorfman disease of bone and soft tissue along with a brief discussion of its differential diagnosis, pathogenesis, and current management.

Data Sources.—

Thorough review of the literature with focus on clinical manifestations, imaging findings, key histomorphologic features, pathogenesis, and treatment.

Conclusions.—

The diagnosis of Rosai-Dorfman disease of bone and soft tissue may be quite challenging because of its variable clinical presentation and nonspecific imaging findings. It may be asymptomatic without systemic manifestations or associated lymphadenopathy. The definitive diagnosis relies on histopathologic identification of the characteristic S-100–positive histiocytes demonstrating emperipolesis. Bone and soft tissue lesions tend to have lower numbers of characteristic histiocytes and less conspicuous emperipolesis and often demonstrate areas of fibrosis or storiform spindle cell areas resembling fibrohistiocytic lesions. Awareness of these unusual features is necessary in order to consider Rosai-Dorfman disease in the differential diagnosis when confronting these rare and often misleading lesions.

Rosai-Dorfman disease. A legacy of Professor Rosai that is still not exploited completely

Rosai-Dorfman disease (RDD) is a rare form of non-Langerhans cell histiocytosis described by Rosai and Dorfman in 1969. It is a fascinating disease characterized by accumulation of large, pale histiocytes, frequently showing the emperipolesis phenomenon. The variety of pathological aspects and the spectrum of different clinical forms were deeply investigated by Prof. Rosai. Despite recent advancements in the dissection of pathogenetic mechanisms of RDD, with the identification of gene mutations in the MAP kinase pathway, several biological and clinical aspects of this disease remains to be elucidated: this is one of the Prof. Rosai's legacies.

Emergence of cutaneous Rosai-Dorfman disease during immunosuppressive treatment of follicular B-cell lymphoma: A case report

Background

Sinus histiocytosis with massive lymphadenopathy, also known as Rosai-Dorfman disease, is a rare proliferation of non-Langerhans histiocytes. Cutaneous Rosai-Dorfman disease is a rare subtype of Rosai-Dorfman disease limited to the skin with variable clinical presentation.

Case summary

A 59-year-old female with a history of osteoarthritis, hypothyroidism, and follicular B-cell lymphoma presented with pruritic, erythematous, dome-shaped papules that developed while on chemotherapy treatment. During cutaneous disease progression, the patient was further diagnosed with myelodysplastic syndrome. Histology review revealed patchy staining for S100 in the CD68+ histiocytes within the dermis with no enlarged histiocytes or emperipolesis. Given the absence of other findings, this was interpreted as cutaneous Rosai-Dorfman disease.

Conclusion

There is still little known about the aetiology and pathogenesis of cutaneous Rosai-Dorfman disease. Non-specific immunohistochemistry in the midst of lymphoma, immunosuppressive treatments, and myelodysplastic syndrome produced a blurred diagnostic picture and delayed appropriate treatment, highlighting the diagnostic challenges of cutaneous Rosai-Dorfman disease.

Rosai-Dorfman disease in 6-year-old child: Presentation, diagnosis, and treatment

Rosai-Dorfman disease is referred to as sinus histiocytosis massive lymphadenopathy. We are reporting a rare case of Rosai-Dorfman disease, a case of 6-year-old boy with a history of multiple painless submandibular and cervical lymphadenopathy.

Rosai-Dorfman disease in the spleen of a pediatric patient: A case report

BACKGROUND

Rosai–Dorfman disease (RDD) is a rare histiocytic proliferation of unknown etiology commonly found in children and adolescents. The common manifestation of RDD is massive and painless bilateral cervical lymphadenopathy with extranodal disease. While extranodal involvement in RDD is common, the spleen is an infrequent site of disease.

CASE SUMMARY

We report a 10-mo-old female infant with RDD presenting multiple splenic masses without cervical lymphadenopathy. She had fever, and blood tests showed leukocytosis, anemia, and elevated erythrocyte sedimentation rate and C-reactive protein. Ultrasound, computed tomography, and magnetic resonance images demonstrated multiple splenic masses. Despite antibiotic therapy, her symptoms were not relived. She underwent diagnostic splenectomy and was discharged with recovery.

CONCLUSION

In pediatric patients with refractory infectious symptoms or hematological abnormalities, clinicians should suspect RDD, even in patients without significant lymphadenopathy.

Rosai-Dorfman Disease-Like Reaction to Tattoo

A 47-year-old white man presented with a 14-month history of an asymptomatic 2-cm, slow-growing nodular lesion on his left shin that arose in the background of a black tattoo. An excisional biopsy followed by histological examination revealed a prominent lymphohistiocytic infiltrate, with many large, foamy histiocytic cells containing intact inflammatory cells within their cytoplasm, findings consistent with emperipolesis, a feature typical of Rosai-Dorfman disease (RDD). By immunohistochemistry, S-100 (a marker that is positive in almost all cases of RDD) was negative, arguing against the diagnosis of RDD. In addition, prominent black tattoo pigment was seen in many areas, expanding the differential diagnosis to include an unusual reactive lymphohistiocytic response to the tattoo mimicking RDD. Histologically, RDD shows many plasma cells, neutrophils, lymphocytes, and histiocytes with abundant foamy cytoplasm that contains intact lymphocytes and other cells, a phenomenon described as emperipolesis. A wide variety of cutaneous reactions to tattoos have been described, including tenderness, burning pain, inflammation, and pruritus. However, histologic features suggestive of RDD as a reaction to tattoo pigment have not been previously described and should therefore also be considered as a potential rare reaction pattern to tattoos.

Intralymphatic Rosai-Dorfman Disease Associated With Vulvar Lymphedema: A Case Report of an Extremely Rare Phenomenon

Sinus histiocytosis with massive lymphadenopathy, also known as Rosai-Dorfman disease (RDD), is a self-limited histiocytic disorder of unclear etiology which most commonly presents with cervical lymphadenopathy. Purely extranodal presentation of RDD is uncommon, and isolated intralymphatic/intravascular confinement of this entity has not previously been described. We report a 16-yr-old female who presented with vaginal swelling and mass-like enlargement of the right labia. The mass had been present for nearly a year without pain or tenderness. Clinically, the lesion was thought to be a Bartholin gland cyst. Following surgical resection, histologic examination demonstrated a hypocellular myxedematous stroma with a mixture of ectatic thin and thick-walled vessels within which there were numerous collections of histiocytes, lymphocytes, and plasma cells. The histopathologic differential diagnosis included localized vulvar lymphedema, a specialized genital tract neoplasm, and childhood asymmetric labium majus enlargement. The histiocytes showed occasional plasma cells and lymphocytes within their cytoplasm, consistent with emperipolesis. Immunohistochemical studies showed that the histiocytes expressed CD163 and S100, while ERG and D2-40 highlighted their intralymphatic confinement, ultimately leading to the diagnosis of intralymphatic RDD. Intralymphatic RDD may present as vulvar lymphedema and can potentially mimic other myxedematous neoplasms of the vulvovaginal region.

Rosai-Dorfman Disease: Importance of 18F FDG PET/CT to Determine Extension and Extranodal Involvement

Rosai-Dorfman disease or sinus histiocytosis with lymphadenopathy is a rare benign histiocytic proliferative disorder of unknown etiology first described in 1969. It typically affects older females and most common presentation is with massive lymphadenopathy and nonspecific systemic symptoms; therefore, it is often confused with lymphoproliferative disorders [1, 2]. We present the case of a 69-year-old woman with nasal obstruction as only complaint. Laboratory tests showed normal leukocyte count with elevated ANC (absolute neutrophil count), normal RBC count with normal MCV (mean corpuscular volume) and MCH (mean corpuscular hemoglobin), elevated ESR (erythrocyte sedimentation rate), and normal IgG, IgA, and IgM values. Evaluation revealed a nasopharyngeal mass, which was biopsied and reported emperipolesis with positive CD68 and S-100; typical and differential findings of this disease [1, 2]. ¹⁸F FDG PET/CT was performed to determine the extent and involvement of the disease. Considering the presence of few symptoms and no significant laboratory abnormality, treating physicians decided to start a regimen of corticosteroids (prednisolone) for a period of 4 months, after which a follow-up with ¹⁸F FDG PET/CT will be performed.

NRAS Mutations May Be Involved in the Pathogenesis of Cutaneous Rosai Dorfman Disease: A Pilot Study

Background: Purely cutaneous Rosai-Dorfman disease (RDD) is a rare histiocytic proliferative disorder limited to the skin. To date, its pathogenesis remains unclear. Owing to recent findings of specific mutations in the mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) pathway in histiocytic proliferative disorders, it provides a novel perspective on the pathomechanism of cutaneous RDD. We aim to investigate the genomic mutations in MAPK/ERK pathway in cutaneous RDD. Methods: We retrospectively recruited all cases of cutaneous RDD from two hospitals in Taiwan from January 2010 to March 2020 with the clinicopathologic features, immunohistochemistry, and treatment. Mutations of neuroblastoma RAS viral oncogene homolog (NRAS), Kirsten rat sarcoma 2 viral oncogene homolog (KRAS), and v-raf murine sarcoma viral oncogene homolog B1 (BRAF) in MAPK/ERK pathway were investigated by the highly sensitive polymerase chain reaction with Sanger sequencing. Results: Seven patients with cutaneous RDD were recruited with nine biopsy specimens. The median age was 46 years (range: 17–62 years). Four of seven patients (57.1%) received tumor excision, while the other three chose oral and/or topical or intralesional steroids. NRAS mutation was detected in 4 of 7 cases (4/7; 51.7%), and NRAS A146T was the most common mutant point (n = 4/7), followed by NRAS G13S (n = 2/7). There is no KRAS or BRAF mutation detected. Conclusions: We report the NRAS mutation is common in cutaneous RDD, and NRAS A146T was the most frequent mutation in this cohort. Mutations in the NRAS gene can activate the RAS/MAPK signaling and have been reported to be associated with various cancers. It indicates that NRAS mutation in MAPK/ERK pathway may involve the pathogenesis of cutaneous RDD.

Cutaneous Rosai-Dorfman disease: a challenging diagnosis

Rosai-Dorfman disease is a rare benign histiocytic proliferative disease of unknown cause that, in exceptional cases, presents with lesions confined to the skin. Clinically variable types of lesions such as papules, nodules and plaques have been reported. We present a case of a 27-year-old woman with a 1-year history of erythematous papular and nodular lesions on the malar and right axillary regions, previously misdiagnosed as acne. She reported no fever, malaise or weight loss, while physical examination and laboratory workup were normal. Bacteriological and mycobacteriological cultures were negative. Histopathological findings showed dense infiltration of inflammatory cells involving the entire dermis, consisting of large macrophages with emperipolesis, S100 and CD68 positive, neutrophils, eosinophils, lymphocytes and plasma cells. The patient was treated with oral prednisolone without improvement. Dapsone was subsequently initiated with favourable clinical response. The present article aimed to emphasise the clinical and histological differential diagnosis and share the treatment experience.

Indeterminate Cell Histiocytosis Mimicking Rosacea

Indeterminate cell histiocytosis (ICH) is a rare proliferative disorder of histiocytes, which display morphologic and immunophenotypic characteristics of both Langerhans cell histiocytosis (LCH) and non-Langerhans cell histiocytosis (NLCH). We describe an unusual clinical presentation of ICH mimicking rosacea and provide a relevant review of the literature.

Multimodality imaging manifestations of Rosai-Dorfman disease

Background

Rosai-Dorfman disease (RDD) is a rare lympho-histiocytic disorder of indeterminate etiology usually presenting with lymph node involvement, and infrequently with extra-nodal manifestations. The diagnosis of this condition is challenging due to the wide spectrum of disease manifestations.

Purpose

To elucidate the radiologic features of this disease using multimodality imaging in histopathologically proven cases and to identify characteristic features that would enable its differentiation from its mimics.

Material and Methods

We retrospectively evaluated imaging studies of 19 patients with histopathologically confirmed RDD presenting to our institute between January 2004 and March 2016. Imaging modalities included magnetic resonance imaging (MRI), computed tomography, FDG-positron emission tomography (PET) CT, mammography, and ultrasonography.

Results

Lymphadenopathy was the most common imaging feature in our study, seen in 11 (57.8%) cases followed by sino-nasal involvement in 7 (36.8%) cases and intracranial masses in 5 (26.3%) cases. Bilateral homogeneously enhancing cervical lymphadenopathy with avidity on FDG-PET scans was the predominant abnormality on imaging. Sino-nasal involvement manifested as homogeneously enhancing soft-tissue masses occupying the paranasal sinuses. Intracranial disease manifested as sellar/suprasellar masses, dural-based lesions along the cerebral hemispheres and choroid plexus enlargement. Unusual disease manifestations included spinal, osseous, and breast lesions.

Conclusion

Due to the high likelihood of multifocal involvement, the recognition of RDD at one site necessitates screening of other sites for disease. Homogeneously enhancing, FDG-avid lymphadenopathy and sino-nasal masses in association with hypointense extra-nodal lesions on T2-weighted MRI are imaging features which could aid the diagnosis of RDD and facilitate its differentiation from pathologies that present in a similar manner.

Rosai-Dorfman disease: an overview

CONTEXT

Rosai-Dorfman disease is an uncommon histiocytic disorder most frequently presenting as bilateral cervical lymphadenopathy in children and young adults. Extranodal disease occurs in a significant proportion of patients. It has been recently classified as part of the 'R group' of histiocytoses by the Histiocyte Society in 2016. Cutaneous Rosai-Dorfman disease is regarded as a separate disease entity that falls into the 'C group' of histiocytoses according to this classification system. The pathogenesis was previously poorly understood; however, recent evidence demonstrating clonality in a subset of cases raises the possibility of a neoplastic process. A possible association with IgG4-related disease remains controversial.

OBJECTIVES

To provide a comprehensive review of Rosai-Dorfman disease, including nodal, extranodal and cutaneous forms, with a particular emphasis on new insights into the possible clonal nature of the disease; to discuss the recently revised classification of the histiocytoses by the Histiocyte Society; and to summarise the findings from the literature regarding the controversial association with IgG4-related disease.

DATA SOURCES

This review is based on published peer-reviewed English literature.

CONCLUSIONS

Classic Rosai-Dorfman disease, which may be sporadic or familial, is considered a separate entity from cutaneous disease, which is reflected in the revised classification of histiocytoses. An increase in IgG4-positive plasma cells may be seen in Rosai-Dorfman disease. This finding in isolation is of limited significance and should be interpreted with caution. Studies investigating the molecular profile of the disease show that in at least a subset of cases the disease is a clonal process. The classification of Rosai-Dorfman disease is therefore likely to change as our understanding of the aetiopathogenesis evolves.

Recurrent Cutaneous Rosai-Dorfman Disease

Rosai-Dorfman disease (RDD) is a rare proliferative histiocytic disorder, most commonly presenting with cervical lymphadenopathy. When extranodal, a rare manifestation of the disease is the presence of cutaneous lesions. Surgical excision has shown promising results in patients with cutaneous RDD; however, no optimal management has been elucidated. We present a 60-year-old female with recurrence of left thigh cutaneous lesions consistent with extranodal RDD whose optimal management required combined used of excision and chemotherapy.

Scleritis and anterior uveitis may herald the development of an epibulbar tumor in patients with extranodal Rosai-Dorfman disease: a case report

Background

Rosai-Dorfman disease is a rare non–Langerhans cell histiocytosis. Ocular involvement is even rarer, mostly involving the orbit and eyelids, although marginal corneal ulcers, uveitis, and epibulbar masses have also been reported, and is characterized by multiple recurrences. However, the disease course and optimal treatment strategies remain undetermined, in light of the rarity of this disease.

Case presentation

We reported a 36-year-old male patient with the extranodal form of Rosai-Dorfman disease, presenting with scleritis and anterior uveitis in the left eye, who experienced subsequent development of an epibulbar tumor in the same eye. The patient was also complicated by a relapsing facial nodule on the right cheek. After the pathological diagnosis of Rosai-Dorfman disease was obtained, the patient underwent surgical excision of the epibulbar tumor and the facial nodule, accompanied by systemic immunosuppression therapy. At the last follow-up, the patient was asymptomatic without signs of recurrence.

Conclusions

This report highlights the progression of ocular manifestations of Rosai-Dorfman disease and emphasizes the importance of systemic therapy.

Purely Cutaneous Rosai-Dorfman Disease: a True Clinical Diagnosis Challenge

Rosai-Dorfman disease (RDD) is a rare idiopathic benign disease, self-limited non-Langerhans cell histiocytosis, most frequently presented as a massive bilateral and painless lymphadenopathy, associated with fever and weight loss. Extranodal manifestations of RDD represents a true diagnosis challenge for clinicians and surgical pathologists. A 64-year-old female, known with arterial hypertension and type 2 diabetes, presented to our Surgery Clinic for a left arm painless cutaneous tumour, having its onset one year before, and rapidly enlarged in the last two months. Physical examination revealed a firm and elastic cutaneous nodular lesion of 4 x 2 cm in size, prominent to the skin, with central ulceration area of 10 x 5 mm, located on the posterior side of the left arm. Surgery was performed, with lymphoma as a differential diagnosis at intraoperative extemporaneous examination. The RDD disease diagnosis was considered at histopathological analysis and confirmed by immunohistochemistry. Herein, we describe a rare case of purely cutaneous RDD presenting as unique cutaneous ulcerative nodular lesion, surgical treated only, and without local relapse after one-year follow-up.

A comprehensive assessment of cutaneous Rosai-Dorfman disease

BACKGROUND

Cutaneous Rosai-Dorfman (CRD) disease is a rare entity that is characterized by histiocytic proliferation in the skin. The disease has been reported to exhibit different clinical profiles and occasionally confounding histologic features that may be challenging for a correct diagnosis. The purpose of this study was to assess the pathobiology and highlight the variance in clinical and histologic spectrum of the disease based on published literature.

METHODS

A PUBMED search was performed to retrieve cases of cutaneous Rosai-Dorfman disease published in the literature. A PRISMA-guided review of the included articles was performed. Three interesting case reports from our institution are also described.

RESULTS

A total of 263 patients, of which 220 with purely cutaneous disease were identified in 152 studies. The mean age at presentation was 45.2 years with a slight female preponderance, and East-Asian, Caucasian and African populations being largely affected. Majority of the patients presented with multiple lesions, predominantly on limbs and comprising of nodules, plaques and papules that were occasionally pigmented. The classis histologic findings included large foamy histiocytes, exhibiting emperipolesis and a specific immunophenotype (S100+, CD68+, CD1a-). Inconspicuous emperipolesis, fibrosis, increased vascularity, neutrophilic microabscesses and concurrent langerhans cell histiocytosis and lymphoma in few cases highlighted the importance of immunohistochemistry for a definitive diagnosis. The disease shows an indolent and benign course with excision and chemotherapy being most effective for extensive and refractory cases.

CONCLUSIONS

This review of largest cohort of CRD patients provides an updated insight into the clinicopathologic features with possible diagnostic pitfalls and effective therapeutic options that should be useful in diagnosis, management and future research opportunities.

Rosai-Dorfman disease as a rare cause of cervical lymphadenopathy - case report and literature review

Rosai-Dorfman disease (RDD), also known as sinus histiocytosis with massive lymphadenopathy, is a rare, benign clinical entity of unknown cause. RDD is characterised by the overproduction and accumulation of histiocytes, primarily in the lymph nodes, although it may affect every organ and system. It predominantly affects children and young adults. Typically, patients are in good general condition, with massive cervical lymphadenopathy and fever. In about 40% of cases extranodal localisation of RDD is diagnosed. In laboratory tests the most common abnormalities are increased erythrocyte sedimentation rate (ESR), leukocytosis with neutrophilia, normocytic anaemia, and hypergammaglobulinaemia. Histopathological examination remains the mainstay of diagnosis - lymph nodes have massive sinusoidal dilation, containing histiocytes positive for S-100 and CD68, and negative for CD1a. Most patients do not require treatment as spontaneous remissions are observed. We present a brief review of the literature and the case of a six-year-old boy with cervical lymphadenopathy diagnosed with RDD. So far, the patient has not required systemic treatment and has been kept under observation.

[Histiocytic and dendritic cell neoplasms: Review of the literature]

Histiocytic and dendritic cell neoplasms (HDN) are rare and their biology, prognosis, treatment and terminology are still under discussion. They are composed of macrophage and dendritic-derived cells and show a wide range of clinical, morphological and prognostic features. Clinicopathological correlation and a broad immunohistochemical panel are required to establish a correct diagnosis. After the detection of BRAF mutations in Langerhans cell histiocytosis, the potential role of other molecular alterations is being studied. We have reviewed the literature published in the last 10 years to provide an overview of NHD, with particular emphasis their molecular features.

Emperipolesis and S100 expression may be seen in cutaneous xanthogranulomas: A multi-institutional observation

Cutaneous Rosai-Dorfman disease (RDD) can be difficult to distinguish from other non-Langerhans cell histiocytoses, particularly xanthogranuloma (XG). Pathologists use S100 immunoreactivity, abundant plasma cells, and the presence of emperipolesis to distinguish RDD from XG. However, S100 expression has been reported in XG and, in practice, we have occasionally observed emperipolesis in cases that were otherwise clinically and pathologically consistent with XG. We present 10 cases of XG with emperipolesis and variable S100 immunoreactivity. Histologically, 7 cases were most in keeping with XG, and a histologic differential of XG versus RDD was raised in the remaining 3 cases. All 10 cases were clinically consistent with XG. Notably, none of these cases showed abundant plasma cells. Nine cases showed variable S100 immunostaining, ranging from focal/weak expression, to focal/strong, diffuse/moderate, and diffuse/strong expression. Histiocytes in all cases were CD68 positive and CD1a negative. We conclude that emperipolesis and S100 expression in a skin biopsy cannot reliably distinguish XG from cutaneous manifestations of RDD. Clinical correlations are essential, as are histologic clues to a diagnosis of classic XG that include an abundance of foamy mononuclear cells, Touton giant cells, and an absence of pale-stained histiocytes, abundant plasma cells, fibrosis, or vascular proliferation.

Ophthalmic Findings of Rosai-Dorfman Disease

PURPOSE

To describe the ophthalmic, pathologic, and BRAF V600E mutation status of Rosai-Dorfman disease (RDD).

DESIGN

Retrospective case series.

METHODS

A retrospective review of all cases of RDD seen at Mayo Clinic from 1992 to 2016 identified patients with ophthalmic manifestations (n = 8). Immunostain for BRAF and molecular studies for BRAF V600E mutation were performed on cases with tissue available.

RESULTS

Of 76 patients with RDD, 15 had eye examinations; of those, 8 (5 female and 3 male) had ophthalmic manifestations. In RDD patients with ophthalmic manifestations compared to RDD patients without ophthalmic manifestations, the respective median (range) age in years was 42 (15-70) and 56 (32-79) (P = .13) and median (range) logMAR visual acuity was 0.048 (0.000-1.824) and 0.000 (-0.124 to 0.301) (P = .19). Of the 8 patients with ophthalmic manifestations, 4 had ocular involvement and 4 had orbital masses. Patients with ocular involvement had multiorgan disease including tracheal, aortic, renal, skeletal, and soft tissue lesions (n = 4). Patients with orbital masses had no systemic involvement (n = 2), skeletal involvement only (n = 1), or multiorgan disease (n = 1). BRAF immunostaining and molecular studies were negative in all available specimens (n = 6).

CONCLUSIONS

In this series of patients with ophthalmic manifestations of RDD, those with ocular involvement had multiorgan disease while those with orbital masses had more limited systemic disease. Patients with ophthalmic manifestations tended to be younger and have worse visual acuity. Additionally, ophthalmic RDD does not seem to be associated with BRAF mutation.

Rosai-Dorfman disease: Ultrasonography and histopathology study of a soft tissue mass in the forearm

Rosai-Dorfman disease (RDD) is uncommon in daily practice, but needs to be ruled out in rheumatologic conditions to elucidate a wide differential diagnosis. Beside its typical presentation, soft tissue masses can be easily seen in our Rheumatology clinics. Ultrasonography widely extended in our specialty, could also play a role in the diagnosis, to end up with the histological confirmation of the disease.

Soft Tissue Rosai-Dorfman Disease: Case report

Rosai-Dorfman disease (RDD) is a rare benign proliferative histiocytic disorder characterised by massive lymphadenopathy. While extranodal involvement can occur in generalised RDD, isolated soft tissue RDD (STRDD) is extremely rare. We report a 17-year-old male patient who presented to the maxillofacial outpatient department of the Sultan Qaboos Hospital, Salalah, Oman, in 2015 with a painless cheek mass which had been slowly growing over the previous two months. Routine histopathological examinations and immunohistochemistry confirmed a diagnosis of STRDD. Currently, surgical excision is considered to be the most effective curative treatment for STRDD, as the outcomes of other treatment modalities are still unknown. Despite its rarity, STRDD should be considered in the differential diagnosis of histiocytic soft tissue lesions.