Juvenile xanthogranulomatosis with bilateral and multifocal ocular lesions of the iris, cornealscleral limbus, and choroid

Orbital histiocytosis; From A to Z

PURPOSE

Histiocytosis is one of the most challenging diseases in medical practice. Because of the broad spectrum of clinical manifestations, systemic involvements, unknown etiology, and complex management, different types of histiocytosis are still a big question mark for us. Orbital histiocytosis is characterized by the abnormal proliferation of histiocytes in orbital tissues. It could affect the orbit, eyelid, conjunctiva, and uveal tract. Orbital histiocytosis can cause limited eye movement, proptosis, decreased visual acuity, and epiphora. In this study, we review the novel findings regarding the pathophysiology, diagnosis, and treatment of different types of histiocytosis, focusing on their orbital manifestations.

METHOD

This review was performed based on a search of the PubMed, Scopus, and Embase databases or relevant published papers regarding orbital histiocytosis on October 9th, 2023. No time restriction was proposed, and articles were excluded if they were not referenced in English.

RESULTS

391 articles were screened, most of them being case reports. The pathophysiology of histiocytosis is still unclear. However, different mutations are found to be prevalent in most of the patients. The diagnostic path can be different based on various factors such as age, lesion site, type of histiocytosis, and the stage of the disease. Some modalities, such as corticosteroids and surgery, are used widely for treatment. On the other hand, based on some specific etiological factors for each type, alternative treatments have been proposed.

CONCLUSION

Significant progress has been made in the detection of somatic molecular changes. Many case studies describe various disease patterns influencing the biological perspectives on different types of histiocytosis. It is necessary to continue investigating and clustering data from a broad range of patients with histiocytosis in children and adults to define the best ways to diagnose and treat these patients.

Orbital histiocytosis and fibrohistiocytosis: the clinicopathological characteristics of 117 patients, over a decade of experience

PURPOSE

To describe the clinicopathological features of a large cohort of patients with orbital histiocytoses and fibrohistiocytosis, such as Langerhans cell histiocytosis (LCH) and non-LCH disorders, and correlate patients' clinical characteristics with their pathological diagnosis.

METHODS

In this retrospective study, medical records of patients presenting to Farabi Eye Hospital, a tertiary eye care center in Tehran, Iran, from 2010 until 2022, were reviewed. Patients' demographics, chief complaint, location and laterality of the tumor, best-corrected visual acuity, presence of bone erosion on imaging, and their pathological diagnosis were retrieved. Excisional biopsy was performed and evaluated through light microscopy and immunohistochemistry study for their respective markers, including CD1a, CD68, CD207, and S100.

RESULTS

A total of 117 patients with 11 pathological subtypes of histiocytoses and fibrohistiocyosis were identified, with 56.4% male and 43.6% female patients. The mean age at presentation was 23.4 years (range 1.5 months-73 years). Swelling and palpable mass were the most common chief complaints. LCH was the most common pathology (32.5%), followed by juvenile xanthogranuloma (26.5%) and adult xanthogranuloma (21.4%). Age, lesion location, and bone erosion had a statistically significant difference among the various diagnosed subtypes.

CONCLUSIONS

Histiocytoses and fibrohistiocytosis are diverse and rare disorders potentially involving multiple organ systems. Ophthalmic manifestations of these diseases are even more uncommon. We reviewed their orbital presentation along with their respective histopathological findings. Our results also suggested that an orbital CT scan can be of diagnostic value to discriminate LCH from other histiocytic pathologies.

Ocular Involvement in the Histiocytoses: A Literature Review with an Illustrative Case Series

Purpose: To describe and illustrate recent reclassification and clinical descriptions of the histiocytoses, diagnosis and management, and effects on the eye and adnexaePatients and methods: Literature review with an illustrative case series of seven patients with histiocytosis and ophthalmic involvement from a single tertiary centre.Results: Skin lesions with signs including eyelid mass, orbital bone destruction, bizarre keratic precipitates, limbal or iris mass, haemorrhagic anterior uveitis, subretinal lesions of uncertain etiology, ischaemic retinopathy, optic neuropathy, and apparent steroid-resistant inflammations should be comprehensively investigated.Conclusions: Ophthalmic involvement in histiocytosis is rare. Clinical manifestations vary from limited single-organ disease to lethal systemic infiltration or malignancy. Radiology may identify lesions for biopsy. Histology with appropriate markers is essential. Oncology advice may be required.

Corneoscleral xanthogranuloma treated with chemotherapy: The room for nonsurgical management

PURPOSE

To describe a clinical case of corneoscleral xanthogranuloma, a rare manifestation of juvenile xanthogranuloma, and xanthoma disseminatum, which responded well to chemotherapy.

METHODS

Interventional case report and literature search.

RESULTS

A 9-year-old female patient with a disseminated disease showed complete regression of her corneoscleral xanthogranuloma with methotrexate and azathioprine therapy.

CONCLUSION

Since they are potentially blinding, corneoscleral xanthogranulomas are commonly surgically excised. While surgical resection has been widely advocated in the literature, immunosuppressive therapy alone may be a pertinent management line of corneoscleral xanthogranuloma, especially with systemic involvement.

Neonatal glaucoma associated with juvenile xanthogranuloma: Case report

CASE REPORT

The case concerns a 22 day-old male child with juvenile xanthogranuloma (JXG), which manifested as a unilateral glaucoma and with fibrinous haemorrhagic exudate in the anterior chamber affecting the angle of the right eye. Despite a high level of suspicion, the definitive diagnosis was not possible until the infant reached the age of 10 months, after the appearance of the skin lesions typical of this condition and histopathological study of them.

CONCLUSION

JXG is a rare disease, characterised by yellowish skin lesions on the trunk, neck, or head. Up to 10% of cases will have ocular involvement, which is the most common extracutaneous manifestation of the disease.

Successful treatment of systemic juvenile xanthogranulomatosis with cytarabine and 2-chlorodeoxyadenosine: case report and review of the literature

The non-Langerhans cell histiocytosis (LCH) juvenile xanthogranulomatosis (JXG) is usually a benign disease limited to the skin. Only a few cases of systemic disease with at least two affected organs and lethal outcomes have been reported to date. Treatment is controversial and no standard protocol is available. We report the rare case of a 22-month-old boy presenting multiple erythematous brownish papules of the head, trunk and legs, which had developed starting from his 6th month of life. Additional symptoms were delayed psychomotor development, hydrocephalus and hepatosplenomegaly. Further diagnostics revealed a systemic JXG with involvement of the skin, central nervous system, liver and spleen. The patient did not respond to initial therapy with prednisone and vinblastine according to protocol III for LCH. However, further therapy with cytarabine and 2-chlorodeoxyadenosine followed by a consolidation phase with 2-chlorodeoxyadenosine alone was successful and the patient is in his 4th year of remission. We provide a comprehensive review of the reported cases of systemic JXG to date.

The epidemiology, clinical characteristics, histopathology and management of juvenile- and adult-onset corneoscleral limbus xanthogranuloma

PURPOSE

Adult-onset xanthogranuloma (AOX) of the corneoscleral limbus is a rare inflammatory condition of unknown aetiology. Similar to limbal juvenile xanthogranuloma (JXG), it presents as a growing mass at the corneoscleral junction. Limbal AOX and JXG can lead to sight-threatening complications if not managed in a timely manner. This systematic review summarises the main clinical and histopathological features of limbal AOX/JXG and discusses the management of this uncommon disease.

METHODS

We performed a literature search in the MEDLINE database for all historical entries, using the search terms "limbus", "limbal" and "xanthogranuloma", and retrieved all articles reporting on limbal xanthogranuloma. After refining the search to articles relevant to limbal AOX, we were able to identify ten adult cases of limbal AOX and compare those with all reported cases of limbal JXG.

RESULTS

Clinically, AOX usually presents as an isolated smooth, yellowish, dome-shaped nodule at the corneoscleral junction, similar to an ocular presentation of JXG, with which it also shares similar histopathological features.

CONCLUSION

Limbal JXG and AOX may represent the same disease entity. Diagnosis relies on the clinical presentation, pathology and immunohistochemical profile. Spontaneous regression is unlikely, and thus prompt surgical intervention should be considered to prevent sight-threatening complications. Xanthogranuloma should be included in the differential diagnosis of corneoscleral limbal masses in patients of all age groups.

Ocular juvenile xanthogranuloma

PURPOSE

To report the clinical and histopathologic characteristics and prognoses of three ocular juvenile xanthogranuloma (JXG) cases.

CASE REPORTS

Three cases were included in this study. The first case involved a 5-year-old girl with an enlarging yellowish mass at the limbus with corneal involvement. Ultrasound biomicroscopy showed a poorly demarcated mass involving the underlying cornea and sclera. The mass was excised in combination with a lamellar keratoplasty procedure. No recurrence was seen at the 2-year follow-up. The second case involved a 2-year-old boy with an enlarging yellowish mass on the conjunctiva, without limbal involvement. The mass was excised with no recurrence noted 1 year later. The third case involved a 7-month-old girl with unilateral eye redness and photophobia combined with multiple orange-red, raised nodular lesions on the skin. Examination under general anesthesia revealed a gray-yellow mass in the inferior and temporal iridocorneal angles. The intraocular pressure and corneal diameter were normal. Examination using ultrasound biomicroscopy showed a high-level echo lump in the inferior and temporal angles. There was no treatment for this case. At the 1-year follow up, the eye symptoms had resolved and the skin lesions were flat. Histopathologic examinations were completed on all three cases. The presence of Touton giant cells in hematoxylin-eosin staining, positive CD68 staining, and negative S-100 and CD1a staining confirmed the diagnosis of JXG.

CONCLUSIONS

We report three histopathologically confirmed ocular JXG cases involving the corneoscleral limbus, conjunctiva, and iris with angle involvement, respectively. Ultrasound biomicroscopy performed on two cases demonstrated no obvious division between the mass and the surrounding structures. The cases with ocular surface involvement were successfully treated by excision and the case with iris involvement spontaneously regressed without any treatment. Early excision may be the better choice for ocular surface lesions, especially when corneal involvement is a possibility.

Presumed ocular juvenile xanthogranuloma and biopsy-proven cutaneous mastocytosis occurring sequentially in a young boy

Juvenile xanthogranuloma is a benign non-Langerhans cell histiocytosis characterized by skin lesions that tend to be self-limited. Ocular lesions can occur in juvenile xanthogranuloma, most commonly presenting as an iris granuloma. Skin lesions of juvenile xanthogranuloma may appear similar to lesions of mastocytosis. Mastocytosis includes a heterogeneous group of diseases characterized by the proliferation and abnormal infiltration of mast cells. Rubbing of cutaneous lesions leads to the release of histamine, causing the lesions to urticate. Juvenile xanthogranuloma and mastocytosis skin lesions occurring concurrently is extremely rare, with only four cases reported. Ocular juvenile xanthogranuloma and cutaneous lesions of mastocytosis have never been described in the same patient in the literature. The authors describe a patient with an ocular juvenile xanthogranuloma presenting at birth with cutaneous mastocytosis developing several years later.