Ancient schwannoma of the female pelvis

Background The objective of this article is to define the imaging characteristics of ancient schwannoma, which is a rare variant of benign schwannoma with degenerative changes, arising in the female pelvis simulating ovarian tumors. Methods Eleven surgically proven ancient schwannomas of the female pelvis were evaluated retrospectively on the basis of CT and MR findings. Results Typical intra-pelvic schwannoma was a neurologically asymptomatic large mass, which may situate at presacral or lateral pelvic region with the continuity to the nerve or neural foramen. Ancient schwannomas manifested as encapsulated solid masses with random or eccentric cystic areas, or as cystic masses with marginal crescent-shaped or nodular solid components. Hemorrhagic changes and calcifications were often observed on MRI and CT respectively. To detect ipsilateral normal ovary and to demonstrate centripetal displacement of the adjacent rectum or iliac vessels were helpful to diagnose the tumor as an extra-ovarian mass situated at the extraperitoneal region. Conclusions Diagnosis of ancient schwannoma before surgical treatment is important and should be made by its characteristic clinical and imaging findings.     

卵巢颗粒细胞瘤影像学表现与临床病理对照分析

目的 分析卵巢颗粒细胞瘤的临床、超声及CT特征,旨在提高本病的诊断水平.方法 回顾性分析24例经病理证实的卵巢颗粒细胞瘤患者的临床及影像学资料.所有患者均接受超声检查,其中11例同时接受CT检查.结果 超声检查中,2例表现为实性包块,21例表现为囊实混合性包块,1例表现为囊性包块;CT检查者中,1例表现为实性包块,9例表现为囊实混合性包块,1例表现为囊性包块.卵巢颗粒细胞瘤的超声、CT表现与病理表现基本一致.结论 卵巢颗粒细胞瘤的超声和CT表现虽具有一定特点,但特异性不高,最后诊断常需依赖病理证实.     

胃神经鞘瘤超声内镜下被误诊为胃间质瘤4例并文献复习*

目的为了提高超声内镜(EUS)对胃神经鞘瘤的检出率。方法回顾分析2008年5月-2015年6月温州医科大学附属第一、第二医院和台州市第一人民医院4例病理及免疫组化确诊为胃神经鞘瘤但经EUS误诊为胃间质瘤的临床资料及EUS的影像特征并文献复习。结果 4例胃神经鞘瘤均为女性且均为良性,胃镜下4例病灶均为单发,有3例位于胃体,1例位于胃底;EUS下病灶均起源于胃固有肌层,病灶处呈低回声团块,回声均匀,边界清楚,内部回声均未见钙化灶或囊性变;2例病灶周围可见光晕现象。文献复习发现:胃神经鞘瘤好发于女性;周围光晕现象可能为胃神经鞘瘤的特征性表现;钙化、囊性液化改变在胃神经鞘瘤中较少见,在胃间质瘤中较常见。结论位于固有肌层的胃神经鞘瘤与胃间质瘤在EUS下很难区分;对病灶位于胃体、超声图像示病灶起源于固有肌层,呈低回声、回声均匀、边界清楚的女性患者,需仔细观察病灶内部回声是否有钙化、囊性变以及病灶周围是否有光晕现象,综合考虑,除需考虑胃间质瘤外还要排除胃神经鞘瘤的可能性。     

Intraparotid facial nerve schwannoma: A case report

Facial nerve schwannoma occurring within the parotid gland is a rare tumour. We report a case of schwannoma within the parotid gland in a young female patient, who underwent ultrasound and magnetic resonanceimaging(MRI) and subsequent surgical excision of the lesion. The lesion showed hyperintensity on T2-weighted and diffusion-weighted MRI. There was no adjacent lymphadenopathy. Although hyperintensity on diffusionweighted MRI could suggest malignant tumours, the characteristic "string sign" provided the clue for the diagnosis of schwannoma.     

肾上腺神经鞘瘤的CT和MR表现

目的 探讨肾上腺神经鞘瘤的CT和MR表现。方法 回顾性分析12例经手术病理证实的肾上腺神经鞘瘤的临床及影像学资料,所有患者接受CT平扫及增强扫描,4例接受MR平扫及增强扫描。结果 12例肾上腺神经鞘瘤均单发,其中左侧8例,右侧4例,肿瘤体积1.75 cm×1.64 cm×2.91 cm~12.56 cm×9.63 cm×25.26 cm,CT平扫8例为均匀等密度或略低密度,4例密度不均,内有坏死、囊变,其中1例伴少许钙化,平均CT值15~40 HU,增强后呈轻至明显强化,实质部分强化均匀,囊性部分无强化。MR平扫示肿瘤在T1WI表现为等或低信号,T2WI为稍高信号,1例肿瘤信号均匀,增强扫描明显均匀强化;3例由于坏死、囊性变信号不均。结论 CT和MRI显示肾上腺区病变具有完整包膜、内部囊性变、出血、钙化及渐进式强化等为肾上腺神经鞘瘤主要影像学特征,可提示肾上腺神经鞘瘤诊断、并为临床诊治提供重要信息。     

Primary hydatid cyst of peritoneum presented as abdominal lump: a rare presentation

The incidence of primary hydatid cyst of peritoneum is 2%. It can present as a palpable abdominal lump. The differential diagnosis is cystic ovarian tumor clinically and radiologically. Peritoneal hydatid disease should be included in differential diagnosis of sonographically diagnosed pelvic cystic lesion.     

Intranasal schwannoma in a young woman

A rare case of a schwannoma arising from the middle meatus in a 24-year-old woman is reported. The patient presented with a 12-month history of right-sided nasal obstruction, rhinorrhoea, anosmia, headache and recurrent minor nosebleeds. Examination of the right nasal cavity revealed a polypoidal mass. Computerised tomography showed the mass completely occluding the nasal passage with evidence of a secondary maxillary sinusitis. She underwent a complete intranasal excision of the polypoidal mass which was arising from the right middle meatus. The histological features of the lesion were consistent with a schwannoma including diffuse immunoreactivity for S-100 protein. This case illustrates the need to consider schwannoma, amongst many other lesions, in the differential diagnosis of a unilateral nasal mass and reinforces the established principle of sending all material removed from the nose for histological examination.     

Sigmoid colon fistula complicating ovarian cystadenocarcinoma: A rare finding

A case of sigmoid colon fistula complicating ovarian cystadenocarcinoma is reported. The entity demonstrated a large air-filled, thin-walled cystic lesion during barium enema examination. The differential diagnosis of distended air-filled cystic lesions is discussed and expanded to include colonic fistula complicating ovarian neoplasms.     

女性盆腔囊性肿物的CT诊断价值

[目的]分析女性盆腔囊性肿物的CT表现,探讨CT在女性盆腔囊性肿物诊断中的价值.[方法]对经手术病理证实且临床资料完整的40例女性盆腔囊性肿物病例进行回顾性分析.[结果]40例女性盆腔囊性肿物均直接来源于妇科器官,双侧发病10例,共发现50个囊性肿物.其中卵巢囊腺瘤12例12个病灶,卵巢良性畸胎瘤13例14个病灶,卵巢非赘生囊肿17例19个病灶（卵巢子宫内膜异位囊肿11例13个病灶,其他非赘生囊肿6例6个病灶）,输卵管积液/炎症3例4个病灶,卵巢透明细胞癌1例1个病灶.[结论]CT能清楚显示囊性肿物本身及其周边关系,能对病变定位、定性提供可靠诊断价值.     

卵巢囊性畸胎瘤的MRI诊断价值

目的探讨卵巢囊性畸胎瘤的MRI表现及诊断价值。方法回顾性分析52例经临床手术病理证实的卵巢囊性畸胎瘤的MRI表现。结果52例均经病理证实为囊性畸胎瘤,其中单侧43例,双侧9例,瘤体61个,瘤体直径最大12．8cm,最小2．7cm。MRI表现以囊性为主,囊区T1WI呈低信号、T2WI呈高信号,囊壁光整;部分区域含有T1WI和T2WI均呈高信号而脂肪抑制序列呈低信号的脂肪信号影,呈囊性或实性混杂信号病灶;增强扫描囊壁可强化。MRI诊断符合率为100％。结论卵巢囊性畸胎瘤有MRI特征性表现,MRI检查可作出明确诊断。     

Sonographic findings of prenatal torsion of ovarian lymphangioma

Ovarian cysts are primarily of follicular origin, and ovarian lymphangioma is an extremely rare lesion. Most ovarian cysts demonstrated on prenatal sonograms are asymptomatic and resolve antenatally. We report a case of ovarian torsion in utero secondary to an ovarian lymphangioma in which sonographic examination revealed a changing pattern of the cystic ovarian mass from an anechoic to echogenic appearance.     

卵巢囊性肿瘤的影像学分析

目的：分析卵巢囊性肿瘤的影像学特点,为临床提供可靠的诊断及治疗依据。方法回顾性分析45例经手术及病理证实的卵巢囊性肿瘤的C T或M RI影像资料。纳入标准为病灶囊性成分所占比例大于70％,肿瘤最大径超过5 cm。所有病例均行平扫及增强C T或M RI检查。结果45例中包括卵巢囊腺瘤16例、囊腺癌6例、腺癌5例、腺纤维瘤1例、畸胎瘤2例、囊肿4例、子宫内膜异位囊肿2例、输卵管系膜囊肿2例及输卵管卵巢囊肿7例。结论影像学检查对卵巢囊性肿瘤的定位、定性诊断和鉴别诊断具有一定的临床意义,明确诊断仍需要结合术后病理结果。     

Actinomycosis involving the liver. Computed tomography/ultrasound correlation

The clinical profile of pelvic actinomycosis, which is being recognized with increased frequency in IUD users, can be misleading in such patients and lead to dangerous delays in diagnosis. The authors present a case in which an IUD user initially sought medical attention for multiple liver abscesses secondary to spread from unsuspected ovarian actinomycosis. The 43-year-old patient, who was admitted with right upper quadrant pain and fever, had a 15-year history of IUD use, although the device had been removed 1 year prior to admission for apparent infection in the left ovary. Ultrasound revealed mixed cystic and solid liver lesions as well as a complex subcapsular fluid collection. A solid left adnexal mass was demonstrated in the pelvis. Computed tomography scan indicated extension of 1 of the complex cystic liver lesions through the liver capsule and into the abdominal wall. Needle aspirations of the liver lesions yielded thick pus that was later identified as Actinomyces israelii. Actinomycosis was evident in the ovarian lesion. Colonization of the vagina and uterus by actinomycosis has been reported by 1.6-5.3% of IUD users, and the risk appears to increase when the same IUD is used for a prolonged time period. In this case, neither the computed tomography scan nor ultrasound suggested an inflammatory process of the left ovary. Aspiration of a liver lesion under ultrasound guidance was necessary for the correct diagnosis. Since actinomycosis has the potential to spread to extrapelvic organs such as the peritoneum, liver, and brain, early diagnosis is essential.     

Thoracoscopic resection of a large lower esophageal schwannoma: A case report and review of the literature

BACKGROUNDEsophageal schwannomas originating from Schwann cells are extremely rare esophageal tumors. They commonly occur in the upper and middle esophagus but less frequently in the lower esophagus. Herein, we report a rare case of a large lower esophageal schwannoma misdiagnosed as a leiomyoma. We also present a brief literature review on lower esophageal schwannomas.CASE SUMMARYA 62-year-old man presented with severe dysphagia lasting 6 mo. A barium esophagogram showed that the lower esophagus was compressed within approximately 5.5 cm. Endoscopy revealed the presence of a large submucosal protuberant lesion in the esophagus at a distance of 32-38 cm from the incisors. Endoscopic ultrasound findings demonstrated a 4.5 cm × 5.0 cm hypoechoic lesion. Chest computed tomography revealed a mass of size approximately 53 mm × 39 mm × 50 mm. Initial tests revealed features indicative of leiomyoma. After multidisciplinary discussions, the patient underwent a video-assisted thoracoscopic partial esophagectomy. Further investigation involving immunohistochemical examination confirming palisading spindle cells as positive for S100 and Sox10 led to the final diagnosis of a lower esophageal schwannoma. There was no tumor recurrence or metastasis during follow-up.CONCLUSIONThe final diagnosis of esophageal schwannoma requires histopathological and immunohistochemical examination. The early appropriate surgery favors a remarkable prognosis.     

26例卵巢肿瘤的CT分析

本文报告了26例卵巢肿块的CT表现。良性病变:绝大部分为囊性,密度均匀,边界清,囊壁以及分隔薄而规则,无壁结节;少部分为实性、均匀密度的软组织肿块。恶性病变:一般为实性或囊实性,密度不均匀,实性部分可见不规则坏死灶;少部分为囊性,密度不均匀,囊壁以及分隔厚而不规则,并见软组织结节。结合文献分析了CT对卵巢肿块的诊断价值和限度。     

Cecal schwannoma with laparoscopic wedge resection: report of a case

Schwannomas of the large intestine are relatively rare. Here, we present a case of schwannoma of the cecum in a 59-year-old woman that was successfully resected by laparoscopic wedge resection. In a medical checkup, a colonoscopy revealed a 2 cm submucosal lesion, without mucosal changes, located in the cecum wall contralateral to Bauhin's valve. Abdominal contrast CT and contrast MRI indicated a smooth-surfaced, semi-round tumor of about 2 cm that gave an enhanced homogeneous signal in the cecum. Laparoscopic wedge resection was performed after the diagnosis of benign submucosal tumor. The lesion was 2.5 × 2.0 cm, was histologically composed of spindle neoplastic cells arranged in cords, was positive for S-100 and vimentin, and was diagnosed as schwannoma. The details of this case are reported herein and focus on the successful application of laparoscopic wedge resection for treatment of the colonic submucosal lesion.     

Giant exophytic cystic adenomyosis with a levonorgestrel containing intrauterine device out of the uterine cavity after uterine myomectomy: A case report

A cystic lesion arising from the myometrium of the uterus,termed as cystic adenomyosis,has chocolate-like,thick viscous contents and contains various amounts of endometrial stroma below the glandular epithelium.It is an extremely rare type of adenomyosis.CASE SUMMARY Herein,we report an unusual case of a giant cystic mass in the pelvic cavity after uterine myomectomy.The patient complained of abnormal uterine bleeding and severe dysmenorrhea.After a levonorgestrel-containing intrauterine device(LNG-IUD)was inserted,her symptoms were greatly alleviated.However,the LNG-IUD was detected in the cystic cavity during the follow-up.For fear of the intrauterine device migrating into and damaging the surrounding viscera,surgical treatment was proposed.Therefore,laparoscopic resection of the lesion and removal of the LNG-IUD were performed and cystic adenomyosis with an LNG-IUD out of the uterine cavity was diagnosed.CONCLUSION We believe that myomectomy breaking through the endometrial cavity may have been a predisposing factor for the development of cystic adenomyosis in this case.     

An unusual growth of ovarian cystic teratoma with multiple floating balls during pregnancy: A case report

We report a case of ovarian cystic teratoma with an important growth during pregnancy and the sonographic appearance of intracystic multiple, mobile, polygonal structures called intracystic “fat balls.” Due to the rapid growth of the lesion, which exceeded 15 cm in diameter, a right oophorectomy was performed. Histopathologic diagnosis confirmed the mature cystic teratoma. The presence of floating balls composed of keratin and fat is rarely seen but is pathognomonic of mature cystic teratomas. Growth of a teratoma during pregnancy is a rare condition. © 2010 Wiley Periodicals, Inc. J Clin Ultrasound, 2010     

Métastases hépatiques avec envahissement gastrique d’un cystadénocarcinome mucineux du pancréas

A pancreatic mucinous cystadenoma is a rare, but potentially aggressive tumour. We are reporting on the case of a female patient, aged 48 years, with no specific disease history, who was admitted to hospital for pain to the right hypochondrium, as well as jaundice and a change in her general health. An abdominopelvic CAT scan highlighted a pancreatic cystic lesion with hepatic and gastric metastases. An upper gastrointestinal endoscopy showed a gastric tumoral process, umbilicated in the centre. A biopsy revealed a cystadenoma with an ovarian type fibrous stroma. Alongside this case and a review of the literature, we are discussing the epidemiological, clinico-morphological and therapeutic characteristics of this rare entity.