Pneumosinus dilatans of the maxillary sinus. Case report

A case of the rare condition pneumosinus dilatans of the maxillary sinus is presented. This is a rare differential diagnosis of a maxillary disease. The diagnostic imaging features of this condition are described, and a recommendation of views for adequately delineating this disorder is given. Only a few cases of pneumosinus dilatans of the maxillary sinus are described in the English-language literature, and the precise cause and pathogenesis remain obscure. We performed an enlargement of the maxillary ostium in order to increase the ventilation of the paranasal sinus. In the short-term follow-up, this patient has been asymptomatic. The postulated mechanism of air trapping in the sinus cavity seems to be logical in this case, because the symptoms were eliminated by surgically decompressing the sinus to overcome this valve mechanism.     

Pneumosinus dilatans frontalis: a case report

Deformity of the forehead is usually the first clinical presentation of the abnormally large frontal sinus caused by pneumosinus dilatans. We report the diagnosis and surgical treatment of a case. The type of osteotomy we describe is recommended as a method of surgical treatment for this condition when the aesthetic problem is the major complaint.     

上颌窦炎性肌纤维母细胞瘤1例并文献复习

目的:探讨炎性肌纤维母细胞瘤的临床特征、诊断与治疗方法。方法:报告1例上颌窦炎性肌纤维母细胞瘤,并复习相关的国内外的文献。结果:炎性肌纤维母细胞中,CT扫描示不规则的软组织密度影,有侵蚀性的骨质破坏,边界不清。病理示瘤组织由梭形纤维细胞及大量炎性细胞组成。免疫组织化学检测中Vimentin、SMA呈阳性,Desmin等呈阴性。结论:上颌窦的炎性肌纤维母细胞瘤是非常罕见的,诊断主要依靠病理及免疫组织化学检测。炎性肌纤维母细胞瘤中存在染色体的易位,这种易位导致间变性淋巴瘤激酶的过度表达,而呈现一种肿瘤的发展过程,其生物学特性仍然没有统一的说法。     

Inflammatory pseudotumor of the maxillary sinus: report of a new case and review of the literature

A new case of inflammatory pseudotumor (IPT) of the maxillary sinus is presented. The clinical and histological features of this rare entity are discussed. Immunohistochemical studies support a possible myofibroblastic origin. Early diagnosis is important to prevent IPT, classified as a benign disease, from becoming a progressive destructive lesion.     

Hematoma of the maxillary sinus presenting as a mass--a case report and review of literature

We report a case of an organized hematoma of the maxillary sinus presenting with proptosis, facial numbness and a maxillary sinus mass. A review of the literature highlights potential etiologic factors. A diagnostic and therapeutic approach to this uncommon lesion is also discussed.     

Pneumosinus dilatans: a report of three new cases and their surgical management

Pneumosinus dilatans is a rare pathology that primarily involves the frontal sinus. We report three new cases, with special attention given to the pathophysiology and histologic data. Surgical management is reported.     

Primary aneurysmal bone cyst of the maxillary sinus in a child: case report and review of the literature

Our case report describes a primary aneurysmal bone cyst (ABC) of the maxillary sinus in a 12-year-old girl. The young patient presented with progressive diplopia, strabismus, and rapidly growing painless swelling of the left cheek. Imaging studies showed a heterogeneous contrast enhancing mass expanding the left maxillary sinus. The lesion was completely resected endoscopically and histological examination reported it as an ABC. The patient recovered well and is free of recurrence 9 months following surgery. ABC is a benign lesion usually associated with other bone pathology (fibrous dysplasia). It may behave aggressively and invade the orbit; so resection is necessary. Minimally invasive techniques such as endoscopic sinus surgery can be performed successfully in select cases. Long follow up is important because recurrence may occur, in which case further resection is warranted.     

Spherulocytosis of the maxillary sinus: a case report

Spherulocytosis (myospherulosis) is an unusual foreign-body reaction usually occurring in tissues exposed to petrolatum-based products. Due to its occasional localization in the maxillary sinus, it is of interest to rhinologists and maxillofacial surgeons. The pathogenesis of spherulocytosis has remained a matter of controversy. We present the case of a 40-year-old female with no previous contact to petrolatum-based substances and suffering from spherulocytosis of the maxillary sinus. The review of literature with emphasis on etiopathogenesis and factors that predispose to the development of spherulocytosis, other than exposure to petrolatum-based ointment, are discussed.     

Pneumosinus dilatans: demonstrated by sinus expansion on serial sinus X-rays with discussion of possible aetiology

A case of pneumosinus dilatans of the frontal sinus is presented. The findings on serial skull X-rays, performed on three occasions over a 10-year period, seem to support a developmental aetiology for this rare condition.     

Desmoid tumor in the maxillary sinus: a case report

Desmoid tumor in the maxillary sinus is a rare condition. The present case occurred in a 37-year-old male complaining of left nasal obstruction and dull pain in the nape of the neck. The clinical picture, pathology, diagnosis and prognosis are discussed and the literature is reviewed.     

Arteriovenous malformation of the maxillary sinus and mandible: a case report

Vascular tumors are rarely encountered in the paranasal sinuses. When they do arise there, they can be life-threatening because of the risk of bleeding. Embolization alone and in combination with surgical resection has been the mainstay of treatment. We report the case of a prepubertal girl who experienced two recurrences of arteriovenous malformation, one in the maxillary sinus and the other in the mandible. To our knowledge, this is the first report in the literature of recurrences arising in these two locations.     

Cemento-ossifying fibroma of maxillary and sphenoid sinuses: case report and literature review

We report a case of cemento-ossifying fibroma (COF) involving the maxillary and sphenoid sinuses and review the literature in order to study the clinical features, imaging findings and histopathologic characteristics of COF. Special care was taken to distinguish this lesion from cemento-osseous dysplasia (COD). It is almost inevitable that differential diagnosis of COD and COF will be complicated by the fact that some pathologic features are shared by both lesions. A combined study incorporating clinical, radiographic and pathologic findings is important in order to ensure an accurate diagnosis. Postoperative follow-up is essential, especially in cases where incomplete removal of the COF was performed.     

上颌窦木质异物一例

本研究报道1例由外伤引起的上颌窦木质异物的诊治过程,以期为避免误诊和漏诊上颌窦异物提供参考。     

Massive cholesteatoma of the frontal sinus: case report and review of the literature

A case of a massive cholesteatoma of the frontal sinus in an 80-year-old female is reported. This lesion is very uncommon and a review of the English literature revealed only 12 reported cases. Characteristically, these tumors present unilaterally as a painless, slow-growing mass, often accompanied by frontal headache, proptosis and diplopia, and without a history of frontal sinus infection. Curative treatment includes total excision of the cholesteatoma with adequate drainage, which leaves the patient with an excellent prognosis although late recurrence has been reported. While this type of lesion is very rare, it is nevertheless an important differential diagnosis of frontal sinus tumors, due to the associated destruction of bone.