Kimura's disease

Kimura's disease is a rare chronic inflammatory condition of uncertain etiology which has an affinity for the Asian population. It primarily involves the head and neck region, presenting as deep subcutaneous masses and is often accompanied by regional lymphadenopathy and salivary gland involvement. Peripheral blood eosinophilia and elevated serum immunoglobulin E (IgE) levels are characteristic features and the microscopic picture reveals lymphoid proliferation with eosinophilic infiltration. For years, Kimura's disease was believed to be identical to or part of the same disease spectrum as angiolymphoid hyperplasia with eosinophilia (ALHE). Recent reports, however, have confirmed that the two are, in fact, separate entities. We report a case of Kimura's disease in a 22-year-old Indian male who presented with a subcutaneous mass, parotid enlargement and lymphadenopathy. The clinical presentation was suggestive of Kimura's disease and microscopic examination following biopsy of the lesion allowed us to make a definitive diagnosis.

Microcirculatory systems, which can be divided into several segments, have crucial physiological functions. We investigated whether monoclonal antibody against alpha-smooth muscle actin (alpha SMA) was useful for the identification of microcirculatory segments, according to the structure of their periendothelial cells, in two pathological cutaneous conditions. We examined skin specimens from patients with Kimura's disease and with angiolymphoid hyperplasia with eosinophilia, since little information is available on microvascular segments in these conditions. Immunostaining for alpha SMA revealed the morphological characteristics of the periendothelial cells clearly enough to identify five segments in the proliferative microvessels of Kimura's disease and angiolymphoid hyperplasia with eosinophilia. In Kimura's disease, postcapillary venules were predominant, while each vascular segment in angiolymphoid hyperplasia with eosinophilia was uniform. Vessels without periendothelial cells were detected to a greater extent in angiolymphoid hyperplasia with eosinophilia than in Kimura's disease. The antibody against alpha SMA appeared to be useful in the observation of periendothelial cells for the identification of vascular segments in pathological cutaneous conditions.

Selection de resumes interessant les acquisitions nouvelles en pathologie tumorale des tissus mous au cours des annees 88 et 89: description de 2 nouvelles entites. La tumeur fibrohistiocytaire plexiforme et le myofibroblastome palissadique, distinction entre haemangiome epithelioide et maladie de KIMURA et interet de l'anticorps anti EMA comme outil diagnostique courant dans le cadre des tumeurs des tissus mous

Kimura’s Disease of the Parotid Region: Report of 2 Cases and Review of the Literature

Kimura's disease is a rare chronic inflammatory disease of unknown etiology, which was initially described in 19371 but popularized in 1947 by Kimura.2 Only about 200 cases have been reported in the literature hence mis-diagnosis and non-recognition are common. It generally affects the skin, soft tissues and lymphatics of the head and neck region and, rarely, it may involve other regions like retro peritoneum, groin, and trunks and limbs.3–6 The lymph node groups, especially the axillary, epitrochlear, popliteal and inguinal, may be more commonly involved. Presentation in the form of subcutaneous swellings, lymphadenopathy and recurrences after treatment being common make confusion with malignancy likely as in the presented case. All forms of treatment have been tried – including surgery, radiotherapy, immunosuppressive therapy, etc. However, there is no consensus on the correct modality in view of the limited number of reported cases and the treatment remains individualized. There is a very high incidence of recurrence following surgery or other treatment modalities.6–8 The disease more commonly affects Asian men in their second and third decades. The usual clinical features include multiple, painless, subcutaneous swellings and generalized lymphadenopathy accompanied by peripheral eosinophilia and raised serum immunoglobulins, especially IgE. Unlike most allergic disorders, the overlying skin is usually healthy. The only known systemic manifestation is renal involvement in the form of glomerulonephritis and, rarely, nephrotic syndrome. It is thought to be more common in Asia – especially in Japan and China – however, sporadic cases from the West have also been reported.3 In the presented case, on account of history of recurrence and the hard consistency of the gland associated with regional lymphadenopathy there was reason to suspect malignancy. Fine needle aspiration cytology (FNAC) was inconclusive on two occasions and the patient was treated as a suspected case of parotid malignancy. Kimura's disease was thus a histo-pathological surprise.

Although Kimura's disease has often been considered to be identical to angiolymphoid hyperplasia with eosinophilia (epithelioid haemangioma), recent studies suggest that they are different clinicopathological entities. In this study, we have made a detailed morphological comparison of 10 cases of epithelioid haemangioma and 40 cases of Kimura's disease occurring in the Chinese population. The epithelioid haemangiomas occurred in the subcutaneous tissue, skin and maxillary antrum, whereas Kimura's disease affected the subcutaneous tissue, major salivary glands and lymph nodes. Distinctive features of epithelioid haemangiomas were exuberant proliferation of vessels lined by cuboidal to hobnail endothelial cells with irregular nuclei and cytoplasmic vacuoles, fibromyxoid matrix, involvement of muscular coat of blood vessels and zonation of inflammatory infiltrate towards the peripheral portion of the lesion. Distinctive features of Kimura's disease were florid lymphoid infiltrate with prominent lymphoid follicles, vascularization of germinal centres, germinal centre necrosis, marked eosinophilia with or without eosinophil abscess formation, proliferation of high endothelial venules, and sclerosis. The histological features suggest that epithelioid haemangioma is a proliferation of atypical endothelial cells, possibly neoplastic, that is associated with a variable inflammatory infiltrate, whereas Kimura's disease is primarily an inflammatory condition in which high endothelial venules are usually found.

The relationship between the disorder known in Japanese and Chinese literature as Kimura's disease and that known in Western literature as angiolymphoid hyperplasia with eosinophilia (ALHE) has been the subject of debate. Many reports have used the terms synonymously. We have reviewed the histological and clinical features of 4 cases, all occurring in Caucasians, 2 of which are typical of Kimura's disease and 2 of ALHE. Analysis of the cases indicates that the histological features of the 2 disorders are sufficiently different to warrant their recognition as 2 distinct entities. The histological and clinical features of Kimura's disease are most consistent with an allergic or autoimmune process in which blood vessels, lymphocytes and eosinophils participate. Those of ALHE suggest a primary, probably neoplastic disorder of vascular endothelium with a variable and secondary inflammatory response. Although there is some clinical overlap between patients with the 2 disorders, the histological features are distinctive, and the 2 terms should not be used synonymously.

Kimura's disease and angiolymphoid hyperplasia with eosinophilia: Clinical and histopathologic differences

Rare case of Kimura disease of the upper lip: A case report

Kimura's disease (KD) is a rare chronic inflammatory condition of unknown aetiology. It is a benign disease that might mimic a neoplastic process. It primarily affects the head and neck region, presenting as deep subcutaneous masses, and is often accompanied by triad regional lymphadenopathy, salivary gland involvement, and high serum immunoglobulin E (IgE) levels. Here, we report the second documented case of KD in Palestine diagnosed in a 28-year-old male patient who presented with lymphadenopathy and increased serum immunoglobulin E and G (IgE and IgG) associated with intermittent abdominal pain, generalised fatigue, hepatomegaly, cardiomyopathy, reactive airway disease, peripheral vasculopathy, peripheral neuropathy, and focal segmental glomerulosclerosis. The patient was managed with steroids and an immunosuppressant (Azathioprine) with a moderate response for two years. In 2021, treatment with Mycophenolate Mofetil was initiated, which was more effective than Azathioprine.

We report an interesting case of Kimura’s disease (KD) that presented as a giant head and neck mass. KD is a rare chronic inflammatory disorder and usually presents as small subcutaneous swellings in the head and neck region. Such a large mass of 15 × 17.5 cm as seen in our patient has previously not been reported, to the best of our knowledge. The radiological picture was that of an enlarged subcutaneous mass with heterogeneous enhancement of the salivary gland. The histological findings were helpful in identifying the lesion as KD. The combination of these two aided us in differentiating it from other lesions such as follicular lymphoma, angiolymphoid hyperplasia with eosinophilia (ALHE) and Langerhan’s histiocytosis. There is no standard protocol for management of this disease owing to its rarity. Due to the extensive and ill-defined nature of the lesion in our patient, we have started the patient on systemic high-dose corticosteroid therapy to downsize the lesion and we plan to follow up with surgical excision if needed.

Kimura's disease, which occurs endemically in the Far East and sporadically in the West, has so far eluded efforts to determine its exact pathogenesis. It presents as solitary or multiple benign swellings of the skin, has a predilection for the periauricular and scalp regions, and often is associated with regional lymphadenopathy. Morphologically, the lesions are characterized by proliferating blood vessels with rich eosinophilic infiltrate. Peripheral blood eosinophilia and raised serum IgE levels are signature features of the condition. The overall prognosis is good. When surgery is not possible, conservative treatment with either corticosteroids or radiation often can produce a favorable response. Complete surgical excision whenever feasible is the preferred treatment despite a high recurrence rate. Based on a recent case of Kimura's disease in a 55-year-old black woman, we discuss the pitfalls in the diagnosis of this chronic inflammatory disorder.

Kimura disease (KD) is a rare, chronic, inflammatory disorder of unknown etiology characterized by the development of subcutaneous lymphoid masses, usually in the head and neck region; regional lymphadenopathy; peripheral eosinophilia; and elevated levels of serum IgE.KD has been described in China and Japan as "eosinophilic hyperplastic lymphogranuloma" or "atypical granulation associated with hyperplastic abnormalities in the lymphoid tissue".The precise prevalence and incidence and the pathogenesis of KD are unknown.Trauma, infection, an IgE-mediated hypersensitivity reaction, or autoimmune processes have been postulated as possible causes.In this article, we aimed to present a patient who was investigated with elevated serum total IgE and eosinophils and diagnosed as Kimura disease in the light of the current literature.

Kimura disease (KD) is a chronic inflammatory disorder that frequently involves the subcutaneous tissue of the head and neck regions. It often manifests as regional lymphadenopathy or salivary gland enlargement in the affected area. The histologic architecture of the lymph nodes in KD patients is preserved, while the affected tissues show follicular hyperplasia and eosinophilic infiltration. No single modality has been adopted as an optimal treatment for KD. This article concentrates on the fundamental features of KD and reviews current approaches to its treatment.

Fourteen cases of Kimura's disease involving parotid and submandibular glands in Chinese patients are described to draw attention to this unique lesion which has been reported mainly in the Chinese and Japanese literature. Blood eosinophilia is almost always present, there is a male preponderance and the aetiology is unknown. Surgical excision is recommended though irradiation and steroid therapy have also been used.