Inflammatory pseudotumor of the maxillary sinus: CT and MR findings in six cases.

Som, Peter M.; Brandwein, Margaret; Maldjian, Catherine; Reino, Anthony J.; Lawson, William

doi:10.2214/ajr.163.3.8079869

Cited by 81 publications

(66 citation statements)

References 7 publications

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“…Bone changes mimicking malignancy such as erosion, sclerosis, remodeling and thickening can also be detected on imaging studies. [10,11] The destructive nature of sinonasal IMPT is a constant finding and is suggestive of a malignant process. One case of intracranial extension of a tumor located in the maxillary sinus was also reported.…”

Section: Discussionmentioning

confidence: 99%

Sinonasal inflammatory myofibroblastic pseudotumor (plasma cell granuloma)

Arpacı

Kara²,

Özyedek³

et al. 2015

Kulak Burun Bogaz Ihtis Derg

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Inflammatory myofibroblastic pseudotumor (plasma cell granuloma) is a soft tissue lesion consisting of myofibroblasts, mature lymphocytes, histiocytes, plasma cells, eosinophils, and extracellular collagen. Various sites in the body may harbor these lesions. Lungs, omentum, intestines, mesentery, and urinary system are the most susceptible areas. It is usually seen in children and young adults. The lesion is rarely detected in the head and neck region. The orbit and the upper respiratory system are the most common localizations in the head and neck region. Sinonasal tract is a rare site of involvement. The differential diagnosis includes squamous cell carcinoma (spindle cell variant), inflammatory fibrosarcoma, leiomyosarcoma, schwannoma, and nonspecific inflammation. Our patient who had a sinonasal mass showed a benign tumor consisting of spindle tumor cells and inflammatory cells histopathologically. This case was presented due to its rare existence to this site.

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Section: Discussionmentioning

confidence: 99%

Sinonasal inflammatory myofibroblastic pseudotumor (plasma cell granuloma)

Arpacı

Kara²,

Özyedek³

et al. 2015

Kulak Burun Bogaz Ihtis Derg

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“…7 The name is given because these lesions simulate neoplasms, both clinically and radiologically. 1,8 There are many synonyms, such as histiocytoma, xanthogranuloma, plasmocytic cell granuloma, and inflammatory myofibroblastic proliferation, due to its wide histological presentation spectrum. 2,6,8 Histology is non-specific, 8 showing two typical cell types: myofibroblasts and inflammatory cells.…”

Section: Discussionmentioning

confidence: 99%

“…7 Systemic symptoms are usually not encountered. 6,8 All patients in our sample presented a typical clinical picture that included progressive nasal obstruction, repeated nasal bleeding episodes and a nasal tumor. Nasal bulging, facial asymmetry and proptosis seen in patient number 3 are also typical.…”

Section: Discussionmentioning

confidence: 99%

“…8 Soft tissue images in maxillary sinus pseudotumors are associated with erosion, remodeling, sclerosis and bone thinning, mimicking malignant tumors. 8 We raised the question of whether patient 3 originally had a tumor of the orbit that invaded the paranasal sinuses; this, however, appears unlikely, as orbitary forms are less aggressive radiographically.…”

Section: Discussionmentioning

confidence: 99%

“…It is an exclusion diagnosis, after eliminating the possibility of benign and malignant neoplasias, collagen diseases, vasculitis, infection and other inflammatory diseases. 8 A cytological diagnosis of inflammatory pseudotumors is difficult. 9 Laboratory exams may be altered, such as thrombocytosis, hypochromic microcytic anemia, hypergammaglobulinemia and an increased hemosedimentation rate, which resolve following tumor resection.2 The three patients had normal complete blood counts.…”

Section: Discussionmentioning

confidence: 99%

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Pseudotumor inflamatório de seios paranasais

Constantino¹,

Sasaki

Tavares³

et al. 2008

Rev. Bras. Otorrinolaringol.

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Pseudotumor inflamatório pode ser definido como uma lesão que simula neoplasia clínica e radiologicamente. Não se trata de uma entidade clínico-patológica única, mas um termo genérico para qualquer lesão expansiva inflamatória crônica inespecífica. Há poucos relatos de pseudotumor inflamatório em cavidade nasal e seios paranasais. RELATO DE CASOS: Apresentamos três casos de pseudotumor inflamatório em nariz e seios paranasais atendidos na Divisão de Clínica Otorrinolaringológica do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo. DISCUSSÃO: Pseudotumor inflamatório de seios paranasais apresenta sintomatologia variável conforme o local de origem. Geralmente, segue curso benigno, porém pode ser localmente agressivo.

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The Development and Pathologic Processes that Influence Maxillary Sinus Pneumatization

Lawson

Patel

Lin

2008

The Anatomical Record

118

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The maxillary sinus is universally described as a pyramidal-shaped cavity in the maxilla. Hypoplasia, which can occur unilaterally or bilaterally, is graded by the authors by the degree of failure of descent below the nasal floor in achieving its position adjacent to the posterior dentition in the adult. Unlike early studies using plain X-rays, which considered pneumatization into the zygomatic recess and dental alveolus as criteria, the authors have adopted the above-cited parameters based on computed tomography (CT) imaging, which reveals that even when smaller the sinus retains a pyramidal configuration, although truncated. Rarely, the sinus is excessively pneumatized in the nonpathologic state. Review of the literature failed to reveal a comprehensive study of the conditions that alter maxillary sinus volume and configuration. Based on a retrospective review of 6,000 high resolution CT scans of the paranasal sinuses, the types and relative incidences of these conditions have been determined, and a classification system proposed. The mixed-sex sample group (5 2,540) was comprised of nonpediatric (adolescent and adult) and was of a polyethnic composition. Results showed that enlargement of the sinus is uncommonly encountered, and is produced by air (pneumocele) and mucus (mucocele) entrapment, or by benign tumors which have arisen in the sinus or adjacent maxilla and have grown intracavitarily, with the sinus walls expanding and remodeling to accommodate them. Reduction in size and volume is more frequent. Heredo-familial syndromic conditions reduce sinus size by impaired facial growth centers, or obliteration by dense osteosclerosis. Irradiation for neoplastic disease in the pediatric population similarly, directly effect growth centers, or impairs pituitary function. Another iatrogenic cause, direct surgical intervention (Caldwell-Luc procedure) almost universally alters sinus volume and shape by osteoneogenesis. Midfacial fractures involving the sinus also produce distortion by sclerosis as well as by malpositioning of bone fragments. The principal systemic disorders, sickle cell anemia and osteopetrosis, which diffusely effect medullary bone, do so either through compensatory marrow proliferation or sclerotic new bone formation, thus serving to produce maxillary enlargement and sinus obliteration. The greatest source of maxillary sinus distortion and destruction are neoplasms. Malignant sinonasal and oral cavity tumors produce bony erosion of the sinus walls, whereas benign odontogenic cysts remain external to the sinuses and compress it as they enlarge. Most odontogenic tumors produce external compression and remodeling. Fibro-osseous disorders similarly produce size and shape distortions by external

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Inflammatory pseudotumor of the maxillary sinus: CT and MR findings in six cases.

Cited by 81 publications

References 7 publications

Sinonasal inflammatory myofibroblastic pseudotumor (plasma cell granuloma)

Sinonasal inflammatory myofibroblastic pseudotumor (plasma cell granuloma)

Pseudotumor inflamatório de seios paranasais

The Development and Pathologic Processes that Influence Maxillary Sinus Pneumatization

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