Case report: glomus tumour of the nasal cavity and paranasal sinuses

Glomus tumours are relatively rare in the head and neck. We present a glomus tumour of the nasal cavity and paranasal sinuses in a 55-year-old man and describe the CT appearances of this tumour and its histopathology. Received: 8 December 1997 Accepted: 22 December 1997     

MP-RAGE subtraction venography: A new technique

Preliminary evaluation of a new magnetic resonance (MR) venography technique was performed with data sets from five patients undergoing BAR imaging of the brain before and after intravenous administration of gadopentetate dimeglumine. Before contrast agent injection, the patients were imaged with MP-RAGE (magnetization-prepared rapid gradient-echo) and axial turbo T2-weighted sequences. After contrast agent injection, the MP-RAGE sequence was repeated. Images were post-processed with an algorithm that calculates, on a pizel-by-pixel basis, the absolute value of signal intensity of each postcontrast MP-RAGE partition minus that of each precontract MP-RAGE partition. These subtracted partitions were then subjected to a standard maximum-intensity-projection algorithm to obtain the venogram. In all cases, the new method afforded a high-resolution venogram with clear depiction of venous sinus anatomy. Cortical venous anatomy was also clearly depicted.     

Complementary role of MR imaging of ethmomaxillary sinus disease depicted at CT in cystic fibrosis

Purpose: To assess whether MR imaging can improve characterization of ethmomaxillary opacification diagnosed at CT in patients with cystic fibrosis (CF) in order to select patients that may benefit from functional endoscopic sinus surgery (FESS).Material and Methods: Sixty-two CF patients (26 females and 36 males) aged 4-50 years (median 20 years) with ethmomaxillary sinus disease at CT underwent MR examination of the paranasal sinuses (coronal T1 and STIR sequences). FESS had been performed in 28 of the patients prior to this study. MR signal intensities were interpreted as mucosal thickening or infectious material, according to a previous study.Results: Three major maxillary sinus MR patterns could be distinguished: Air-filled, oval-shaped pus-filled, and streaky-shaped pus-filled sinus lumen. For air-filled maxillary sinuses with mucosal thickening, CT and MR imaging were diagnostically equivalent. Where CT showed homogeneous opacification of the maxillary sinuses, MR imaging differentiated between thickened mucosa and pus-filled areas. Patients who had undergone FESS most commonly had air-filled or streaky-shaped pus-filled maxillary sinus lumen. In non-operated patients oval-shaped pus-filled sinus lumen was most common and could occur without ethmoid disease.Conclusion: MR imaging of the paranasal sinuses can differentiate between infectious material and thickened mucosa and should be used to select CF patients with pus-filled areas that can be eradicated with FESS.     

鼻腔及鼻窦粒细胞肉瘤的影像诊断

目的 分析鼻腔及鼻窦粒细胞肉瘤的临床及影像特征,提高粒细胞肉瘤的影像诊断水平。方法 报道3例经病理确诊的鼻腔及鼻窦内粒细胞肉瘤的影像表现,并结合相关文献进行分析。结果 鼻腔及鼻窦粒细胞肉瘤CT上呈等密度,浸润性生长,常累及相邻结构,如咽腔、咽旁、眶内及颅内等,病变区骨质破坏吸收,无硬化改变;MRI上病变呈等T1、稍长T2信号,增强扫描呈中重度强化,周围环形强化程度较高。结论 鼻腔及鼻窦软组织肿瘤伴有邻近多个结构受累、骨质破坏,并有白血病病史的病人,要考虑到粒细胞肉瘤的可能性;白血病病史不明确,但影像表现典型,建议积极做相关检查;最终确诊仍需与病史、病理相结合。     

Epidermoid cyst of the skull with nonpulsatile tinnitus

We report an intradiploic epidermoid cyst of the skull responsible for transverse sinus compression and presenting with nonpulsatile tinnitus. Plain films and CT both demonstrated the tumour. Cerebral angiography showed best the degree of narrowing of the right transverse sinus, accompanied with turbulent flow probably leading to tinnitus. MRI demonstrated accurately both the tumour and the dural sinus compression. The tumour was totally removed, cranioplasty was performed, and the patient was discharged free of symptoms. Received: 28 May 1997 Accepted: 27 October 1997     

飞行人员鼻窦囊肿的诊治和医学鉴定

目的探讨飞行人员鼻窦囊肿（CNS）的发生机制、临床诊治和医学鉴定原则。方法总结飞行人员CNS资料46份,对其进行分类：结果黏膜囊肿44例,黏液囊肿和含牙囊肿各1例。上颌窦囊肿39例,蝶窦囊肿3例,筛窦囊肿、额窦囊肿、上颌窦＋额窦囊肿、上颌窦＋蝶窦囊肿各1例。Ⅰ类（地面有症状或体检时发现）37例,Ⅱ类（地面无症状,飞行中有继发性气压伤表现）9例。手术治疗16例,观察30例：飞行合格41例,永久停飞5例。结论飞行中气压变化的反复刺激可能是飞行人员CNS的发生机制之一,Ⅱ类CNS是医学停飞的重要原因。     

Rhinocerebral invasive aspergillosis

Here we present 10 cases of rhinocerebral aspergillosis. In this study we included only invasive type of cases. In 4 of these disease had extended into the brain parenchyma and in remaining cases diseases had extended intracranially but dura was not invaded. Details about the operative procedure and followup is presented. Till date only 3 of these cases are surviving.     

An unusual foreign body in the paranasal sinuses

We report a case of 38-year-old male who was reffered from eye OPD with a retained foreign body in the periobita of Rt eye extending into the Rt ethmoid and sphenoid sinuses after six months of injury. The foreign body was removed through external ethmoidectomy and incision on the periorbita of Rt eye.     

慢性紧张型头痛患者的无视盘水肿性特发性颅内高压与静脉窦狭窄:病理生理学机制和治疗

慢性紧张型头痛(chronic tension-type headache,CTTH)是临床常见的一种慢性头痛类型,其病理生理学机制尚不完全清楚.CTTH的中枢性疼痛机制可能与无视盘水肿性特发性颅内高压(idiopathic intracranial hypertension without papilledema,IIHWOP)和静脉窦狭窄有关.鉴于CTTH会给患者带来持久的痛苦,其防治十分重要.文章对IIHWOP伴CTTH与静脉窦狭窄的病理生理学机制和治疗进行了综述.