原发性肺黏膜相关淋巴组织淋巴瘤的18F-FDG PET/CT影像学表现

目的 分析原发性肺黏膜相关淋巴组织（MALT）淋巴瘤的18F-FDG PET/CT影像学表现,提高对原发性肺MALT淋巴瘤的认识及诊断能力。 方法 回顾性分析2006年11月至2017年4月经病理确诊的9例原发性肺MALT淋巴瘤患者（男性6例、女性3例,中位年龄59岁）的临床资料及18F-FDG PET/CT显像资料,记录病灶的部位、数量、密度、大小、形态及最大标准化摄取值（SUV_max）,以及纵隔及肺门淋巴结等情况;分析影像信息并同时进行相关文献复习。 结果 9例原发性肺MALT淋巴瘤患者18F-FDG PET/CT表现分为3型:实变型4例、肿块型3例、弥漫肺炎型2例。实变型表现为大小、受累范围不等的实变影;肿块型表现为单发或多发、边缘毛糙的实性肿块影;弥漫肺炎型表现为肺叶内或双肺弥漫的斑片、团块样软组织密度影。在9例患者中可见支气管充气征8例（部分伴有支气管扩张）、三角型灌注征3例、病灶向中心聚拢4例、钙化2例、胸腔积液2例、肺门及纵隔淋巴结肿大2例。所有病灶18F-FDG 代谢不均匀增高,中位SUV_max为6.0（2.6~8.3）;2例弥漫肺炎型纵隔及肺门淋巴结18F-FDG摄取异常增高,SUV_max分别为13.0、4.7。 结论 原发性肺MALT淋巴瘤的18F-FDG PET/CT表现常为斑片状致密影,多见实变影,内部常见支气管充气征,18F-FDG轻度摄取,结合相对缓慢的病程,可考虑为原发性肺MALT淋巴瘤。     

~(18)F-FDG摄取程度、Ki-67表达与DLBCL分期之间的相关性讨论

目的探讨弥漫大B细胞淋巴瘤~(18)F标记的氟代脱氧葡萄糖(~(18)F-FDG)摄取程度、核抗原Ki-67表达与临床分期之间的关系。方法回顾性分析我院70例弥漫大B细胞淋巴瘤患者的病历资料,所有患者均经病理及免疫组化结果确诊,治疗前均常规行~(18)F-FDG PET/CT扫描。结果弥漫大B细胞淋巴瘤患者病灶~(18)F-FDG平均摄取值(SUVave)与Ki-67指数呈显著正相关,相关系数r为0.843,P0.001;Ki-67指数与淋巴瘤分期显著相关(P0.001),且Ki-67指数越高,临床分期越趋向晚期;~(18)F-FDG平均摄取值与淋巴瘤分期无相关性。弥漫大B细胞淋巴瘤患者Ki-67表达水平与肿瘤分期、最大肿瘤直径及血LDH水平有相关性(P0.05)。结论 Ki-67与PET/CT在反映弥漫大B细胞淋巴瘤患者细胞增殖情况及病灶的侵袭程度等方面有着紧密的联系。     

惰性淋巴瘤大细胞转化的~(18)F-FDG PET/CT影像研究(附8例分析)

目的:探讨~(18)F-FDG PET/CT对惰性淋巴瘤大细胞转化的诊断价值.方法:回顾性分析8例惰性淋巴瘤转化前后~(18)F-FDG PET/CT影像,其中男性5例,女性3例,平均年龄53.5岁;8例转化前后均经病理及免疫组化染色证实.结果:8例惰性淋巴瘤最终均转化为弥漫大B细胞型淋巴瘤;其中6例由黏膜相关淋巴组织边缘区B细胞淋巴瘤(MALT)转化;1例由滤泡性淋巴瘤(FL)转化;1例由霍奇金结节性淋巴细胞为主性淋巴瘤(NLPHL)转化.转化前病灶~(18)F-FDG摄取呈轻度增高或无增高,平均SUV为2.2±1.0;转化后病灶~(18)F-FDG摄取明显增高,平均SUV为4.7±1.9;转化后病灶平均SUV明显高于转化前(P<0.01).结论:惰性淋巴瘤以小细胞为主,其增殖活性低,核分裂不明显,葡萄糖代谢水平较低,在PET/CT上病灶呈低摄取;转化成大细胞淋巴瘤增殖活性高,核分裂明显,葡萄糖代谢水平明显增高,提示~(18)F-FDG PET/CT随访可帮助判断惰性淋巴瘤发生大细胞转化.     

胃恶性淋巴瘤的18F-FDG PET/CT表现与鉴别诊断

目的:分析胃淋巴瘤的18F-FDG PET/CT影像学特点,探讨其在胃淋巴瘤的诊断、鉴别诊断和病情评估中的价值。方法:17例经胃镜活检病理证实的胃淋巴瘤患者,包括13例弥漫性大B细胞淋巴瘤,3例粘膜相关淋巴组织B细胞淋巴瘤和1例NK/T细胞淋巴瘤,均在治疗前行PET/CT显像。结果:胃淋巴瘤的PET/CT表现以不同形式的胃壁增厚和显著增高的FDG代谢为主要特征,6例呈Ⅰ型表现(胃壁弥漫性增厚伴FDG代谢显著增高),7例呈Ⅱ型表现(胃壁节段性增厚伴FDG代谢显著增高),3例呈Ⅲ型表现(胃壁局限性增厚伴FDG代谢增高),1例呈Ⅳ型表现(胃壁多发结节样增厚伴FDG代谢串珠样增高);PET/CT评价4例仅累及胃壁,3例累及胃壁和淋巴结,10例累及胃壁、淋巴结和其它脏器。结论:胃淋巴瘤的18F-FDG PET/CT表现以Ⅰ型和Ⅱ型更为多见;18F-FDG PET/CT有助于淋巴瘤的诊断和病情全面评估。     

18氟-脱氧葡萄糖和11碳-乙酸PET/CT显像在原发性肝癌及肝脏肿瘤样病变诊断中的初步研究

目的探讨18氟-脱氧葡萄糖(18 F-fluorodexyoxyglucose,18F-FDG)和11碳-乙酸(11 C-acetate,11 C-ACT)PET/CT显像在原发性肝癌及肝脏肿瘤样病变诊断中的作用。方法回顾性分析9例患者资料,其中男性7例,女性2例,平均年龄70.2岁,所有患者均为肝内单发病灶。治疗前均先行18 F-FDG PET/CT,后行11 C-ACT PET/CT检查,两次检查间隔时间不超过1周。其中有7例肝细胞肝癌(hepatocelluar carcinoma,HCC)、1例胆管细胞癌(cholangiocarcinoma,CCC)、1例肝内感染性病灶,均经病理学或临床随访证实。结果 7例HCC患者18 F-FDG PET/CT显像均为阴性,11 C-ACT PET/CT显像有6例为阳性。18F-FDG PET/CT和11 C-ACT PET/CT显像均未发现1例高分化胆管细胞癌。对于1例肝内炎性病灶,18F-FDG PET/CT显像为阳性,而11 C-ACT PET/CT显像为阴性。结论①11 C-ACT PET/CT显像可以用来探测那些呈18 F-FDG等或低摄取的HCC病灶;②对于高分化的CCC,18 F-FDG PET/CT显像有可能会表现为假阴性结果;③11 C-ACT PET/CT显像可以用来诊断肝内感染性病灶。     

《中华核医学与分子影像杂志》2022年第9期导读

1.论著。本期有3篇18F-FDG PET/CT显像的论文, 其一从抗体不同诱发因素的角度探讨抗N-甲基-D-天冬氨酸受体(NMDAR)脑炎患者脑部葡萄糖代谢特征和差异, 表明18F-FDG PET显像对抗NMDAR脑炎的高敏感性使其有望成为监测抗NMDAR脑炎患者复发的灵敏手段;其二探讨了18F-FDG代谢分布特征在孤立性肺病变良恶性鉴别诊断中的价值, 结果表明18F-FDG代谢分布特征法较SUV法诊断准确性高, 结节状摄取可能是良性的标志, 但仍需更多研究证实;其三探讨了18F-FDG PET/CT在原发乳腺淋巴瘤诊疗中的价值, 结果表明18F-FDG PET/CT显像在原发乳腺弥漫性大B细胞淋巴瘤患者的诊断和初始分期、治疗反应评估及复发监测中可以更好地进行全身评价并发挥重要作用。本期1篇基础研究采用一次性卡套和试剂盒的方式全自动合成多巴胺D2受体显像剂18F-fallypride, 并经动物实验来验证该方法合成产物的药效及生物分布, 结果表明该方法操作简便、产率稳定、质量控制符合要求、重现性高, 可用于GMP体系下的规范化生产。     

神经淋巴瘤病的18F-FDG PET/CT显像:1例报告并文献复习

目的 通过1例神经淋巴瘤病(NL)患者的诊断及文献复习,总结18F-氟代脱氧葡萄糖(18F-FDG)正电子发射计算机断层显像(PET/CT)对NL的诊断价值.方法 介绍1例经病理证实的弥漫大B细胞淋巴瘤伴周围神经病患者的临床表现和18F-FDG PET/CT显像结果,与传统影像学检查手段MRI和CT相比较,并结合既往文献进行复习.结果 患者为38岁女性,因“左胸背疼痛2个月”就诊,胸椎增强MRI检查示胸4椎体左侧附件、左侧第5后肋骨质破坏,不排除肿瘤可能.18F-FDG PET/CT示胸4、5椎体左侧椎间孔区根块状放射性摄取增高影.病灶沿着左侧第5肋骨肋间神经呈束带状、短条状放射性摄取增高,胸骨左旁第2前肋间可见一类网形放射性摄取增高灶.后者穿刺活检病理示弥漫大B细胞淋巴瘤(A型).病变累及第4、5胸椎左侧神经根及左侧第5肋间神经,临床诊断为NL.经对症化疗后复查18F-FDGPET/CT,原异常放射性浓聚影消失.文献复习也显示PET/CT较MRI及CT有较高的阳性显示率,能更好地反映全身情况,对早期诊断NL有所帮助.结论 18F-FDG PET/CT是一种早期诊断NL有效和敏感的检查方法,特别是在患者有恶性血液病史,临床出现周围神经症状,其他检查手段阴性的情况下.与MRI等传统影像学检查手段相比,18F-FDGPET/CT能更直观地反映NL的病情程度,并准确反映受累神经数目、范围、病灶大小、形态和肿瘤活性,可为穿刺活检提供重要信息.     

原发性肾上腺淋巴瘤合并肝细胞癌全身18F-FDG PET/CT显像1例

笔者报道了1例原发性肾上腺淋巴瘤（PAL）合并肝细胞癌患者全身18F-氟脱氧葡萄糖（FDG） PET/CT 显像,PAL在临床上相对少见,特别是遇到合并其他恶性肿瘤的患者时容易误诊为恶性肿瘤转移。笔者主要分析了PAL合并肝细胞癌全身18F-FDG PET/CT 显像的特点并进行文献复习,为其诊断提供更多参考。     

11C-MET PET/CT 脑肿瘤显像临床初步应用

目的:初步评价11C-MET PET/CT脑显像临床应用价值.方法:研究对象为5例健康志愿者和36例脑部肿瘤患者,健康志愿者行11C-MET PET/CT脑显像,并作为对照组,36例脑部肿瘤患者中19例同时行11C-MET及18F-FDG PET/CT显像,17例仅行11C-MET PET/CT显像;结合健康对照组图像,对本组36例脑部肿瘤患者11C-MET PET/CT脑显像进行分析,并对同时进行18F-FDG PET显像者进行配对比较.结果:所有患者中11C-MET PET/CT显像阳性者30例,T/B均值为1.72±0.39,18F-FDG PET/CT显像阳性者9例,T/B均值为1.49±0.13.19例患者接受11C-MET PET/CT及18F-FDG PET/CT脑显像,T/B均值分别为1.64±0.49及1.16±0.36 (t=3.33,P<0.01).11C-MET PET/CT显像诊断脑肿瘤初诊患者灵敏度、特异度及准确度均为100%,其诊断脑肿瘤复发的灵敏度、特异度及准确度分别为94.7%(18/19)、100%(5/5)、95.8%(23/24).结论:单独行11C-MET PET/CT脑显像可满足大多数脑肿瘤患者治疗前定位与治疗后疗效监测的需要;若与18F-FDG PET显像联合应用,更可能在肿瘤分级上获得帮助.     

18F-FDG PET/CT显像联合HRCT对孤立性原发肺浸润性黏液腺癌的诊断价值

目的探讨孤立性原发肺浸润性黏液腺癌18F-FDG PET/CT显像和HRCT征象及两者联合对该病的诊断价值。方法回顾性分析经病理证实为浸润性黏液腺癌、有18F-FDG PET/CT双时相显像及病灶层面同机HRCT扫描资料的9例患者,对PET/CT早期、延迟显像及滞留指数、HRCT征象进行综合分析。结果HRCT图像上表现为2例呈实性结节、病灶周围无类似卫星灶样影,6例实性结节周围伴小点片及磨玻璃样影,1例为单纯磨玻璃样结节;分叶征(6例)、血管集束征(6例)、支气管充气征(4例)、空泡征(2例)、毛刺征(1例);18F-FDG PET/CT融合图像上8例病灶表现为不均匀FDG代谢增高,早期显像平均SUVmax为3.2±2.5,延迟现象SUVmax增高6例、降低2例,平均SUVmax为3.5±2.4,平均滞留指数为(10.4±29.3)%,9例均未见纵隔、双侧肺门淋巴结及其他部位转移征象,其18F-FDG PET/CT融合图像上18F-FDG摄取与HRCT相匹配,18F-FDG摄取相对集中于结节的实性区域,病灶磨玻璃区18F-FDG摄取不明显;综合手术病理结果等临床资料证实,9例均为T1N0M0期,与PET/CT分期一致。结论对于影像学检查发现肺孤立性占位患者,在单一影像学检查难以明确诊断的情况下,18F-FDG PET/CT双时相显像上病灶不均匀18F-FDG摄取相对集中于其实性区域的代谢方式与HRCT相联合,可辅助孤立性原发性肺浸润性黏液腺癌的诊断。     

Peripheral bone involvement of intravascular large B-cell lymphoma on 99mTc-MDP bone scan and 18F-FDG PET/CT

A 64-year-old man was admitted for evaluation of recently developed anemia and bone pain. The bone scan showed diffusely active lesions in the peripheral bones, symmetrically. Interestingly, 18F-FDG PET/CT revealed the hypermetabolic changes in the peripheral bones as well as the internal organs. Biopsy of bone marrow confirmed the diagnosis of intravascular B-cell lymphoma. After the 3 cycles of R-CHOP chemotherapy, 18F-FDG PET/CT showed improvement of the previous hypermetabolic lesions, suggesting good response. Intravascular B-cell lymphoma is a rare and aggressive variant of diffuse large cell lymphoma characterized by proliferation of malignant cells within the vascular lumina.     

Detection of Richter's transformation of chronic lymphocytic leukemia by PET/CT.

Our objective was to evaluate the accuracy of PET/CT for the diagnosis of Richter's transformation of chronic lymphocytic leukemia (CLL) to diffuse large cell lymphoma. METHODS: A retrospective study was performed of 37 patients with CLL who underwent 18F-FDG PET/CT at our institution between March 2003 and July 2005. All PET/CT scans were reviewed in consensus by 2 diagnostic radiologists. Sites of abnormal 18F-FDG uptake with a maximum standardized uptake value (SUVmax) of greater than 5 were considered highly suggestive of Richter's transformation. The PET/CT findings were correlated with histologic findings from bone marrow or lymph node biopsy performed within 6 wk of PET/CT and with clinical follow-up. RESULTS: The 37 patients (26 men and 11 women; mean age, 61 y, range, 40-82 y) underwent 57 PET/CT scans. In 10 (91%) of 11 patients with Richter's transformation, PET/CT detected sites of abnormal 18F-FDG uptake having an SUVmax of greater than 5. Richter's transformation was missed in 1 patient who had only low-grade 18F-FDG uptake (SUVmax < 5). Nine patients had false-positive PET/CT findings; in 3 of these patients, alternative malignancies were diagnosed (Hodgkin's disease; metastatic neuroendocrine carcinoma; non-small cell lung cancer). In all remaining patients, PET/CT correctly excluded Richter's transformation. For the specific diagnosis of Richter's transformation of CLL to diffuse large B-cell lymphoma, PET/CT had overall sensitivity, specificity, and positive and negative predictive values of 91%, 80%, and 53% and 97%, respectively. CONCLUSION: PET/CT can detect Richter's transformation of CLL to diffuse large B-cell lymphoma with a high sensitivity and a high negative predictive value.     

^18F-FDG PET在原发性肾上腺淋巴瘤中的作用

目的探讨^18F—FDGPET（PET／CT）在原发性肾上腺淋巴瘤（PAL）中的作用。方法回顾性分析2005年10月至2009年8月确诊为PAL的3例患者。3例均为老年男性,双侧性NHL,治疗前均行超声、CT及PET（PET／CT）检查,并有组织病理学诊断资料。采用利妥昔单抗（rituximab）与环磷酰胺（cyclophosphamide）、表阿霉素（doxorubicin）、长春新碱（vincristine）、泼尼松（prednisone）组合（R—CHOP）方案化疗。治疗后1例进行了PET／CT的随访复查。^18F—FDGPET显像获得病灶SUVmax及与肝SUVmax的比值。结果3例均为双侧性弥漫大B细胞型PAL,骨髓穿刺阴性,R-CHOP方案化疗后,例1通过4次^18F—FDGPET复查随访、指导治疗,已存活1年7个月;例2伴有肾上腺皮质功能低下,6个月后死亡;例3年龄大（77岁）,病情重,手术部分切除后化疗,12个月后死亡。结论PAL虽然恶性程度极高,但如能早期诊断,并进行^18F—FDGPET疗效监测、修正治疗方案,可延长患者生存期。     

~(18)F-FDG PET/CT在行结肠癌检查时发现同时性重复癌的价值

目的探讨18氟-氟脱氧葡萄糖(18F-FDG)PET/CT用于检查结肠癌时发现同时性重复癌的价值。方法回顾性分析232例经病理证实结肠癌病人的18F-FDG PET/CT影像资料和临床病理结果,采用卡方检验比较18F-FDG PET/CT结果与病理结果并行kappa系数一致性检验,分析PET/CT显像的诊断效能。结果 232例病理证实的结肠癌病人中,56例病理证实为重复癌。18F-FDG PET/CT诊断真阳性53例,假阳性4例,其中2例经肠镜病理证实分别为息肉和管状腺瘤(癌前病变),1例病理证实为甲状腺腺瘤,1例为肺炎性假瘤。假阴性3例,其中1例为胃窦部印戒细胞癌,1例为肾透明细胞癌,另1例18F-FDG PET/CT显像为高代谢,诊断为结肠癌肝转移,结果病理证实为结肠癌+原发性肝癌。18F-FDG PET/CT诊断重复癌的敏感度为94.64%,特异度为97.58%,准确度为96.83%,阳性预测值92.98%,阴性预测值98.17%。与病理诊断结果比较,两者间差异无统计学意义(P≈1.000),而且两者间一致性良好(κ=0.917,P=0.000)。结论应用18F-FDG PET/CT进行结肠癌检查时可以有效发现同时性重复癌。     

Bilateral Vagus Nerve Neurolymphomatosis Diagnosed Using PET/CT and Diffusion-Weighted MRI

ABSTRACT: In neurolymphomatosis, malignant lymphocytes infiltrate the peripheral nervous system in the presence of a known or unknown hematological malignancy. This report describes the findings of diffusion-weighted MRI and F-FDG PET/CT in a 65-year-old man with hoarseness. Results revealed a mass with restricted diffusion on diffusion-weighted imaging in the right visceral vascular space, increased uptake of F-FDG, and other masses at distant peripheral nerves. Restaging PET/CT showed involvement of the right brachial plexus and right sciatic nerve. Biopsy and immunohistochemistry of the right vagus nerve and cervical lymphadenopathy revealed a diffuse large B-cell non-Hodgkin lymphoma.     

Neurolymphomatosis; a case report

We present a case of indolent neurolymphomatosis in a 55-year-old male patient with worsening pain and weakness in his right leg over the past few months. The patient has a past medical history of type II diabetes mellitus, four-year history of worsening left foot drop, left lower limb pain and weakness attributed to diabetic amyotrophy, and back pain. The new right-sided symptoms prompted further imaging which revealed a left sciatic nerve mass which was biopsied. Initial biopsy results were inconclusive. ¹⁸F-FDG PET/CT revealed the full extent of this patient's disease and helped plan for a more representative biopsy site, which finally established a diagnosis of diffuse large B-cell lymphoma involving the lumbosacral nerve roots. The patient underwent a course of chemotherapy. ¹⁸F-FDG PET/CT was ordered again at the end of treatment showing partial response to therapy. He underwent radiation therapy to the site of residual disease, with complete metabolic response of lesions on follow up PET CT.     

Intravascular large B-cell lymphoma with diffuse FDG uptake in the lung by 18FDG-PET/CT without chest CT findings

We report a rare case of intravascular large B-cell lymphoma (IVLBCL) with diffuse fluorodeoxyglucose (FDG) uptake in the lung by (18)FDG-positron emission tomography/computed tomography (PET/CT). CT showed nodular shadow, whereas diffuse FDG uptake in PET/CT suggested IVLBCL in the lung. A random skin biopsy provided histological evidence of IVLBCL. The patient responded well to combination chemotherapy. Only two cases of IVLBCL in which diffuse pulmonary FDG uptake was demonstrated have been reported previously. FDG-PET/CT plus random skin biopsy may be useful for the early diagnosis of IVLBCL with pulmonary involvement even without convincing radiological findings in the lung.     

Splenic and bone marrow increased 18F-FDG uptake in a PET scan performed following treatment with G-CSF

We present the case of an 11 year-old Caucasian girl who presented chest pain of 12 weeks evolution, with no other symptoms and a negative physical examination. Lactate dehydrogenase levels were increased to 797 U/l, whereas beta-2-microglobulin (BM2) levels were normal. The thoracic CT showed a bulky mediastinal mass that occupied the pretracheal, paratracheal and right prevascular regions. The gallium scintigraphy showed high uptake in the mediastinic region; the bone scintigraphy was negative. Biopsy of the mediastinal mass revealed the presence of diffuse large B-cell non-Hodgkin's lymphoma. Treatment included 4 cycles of chemotherapy followed by 7 days of subcutaneous granulocyte colony-stimulating factor (G-CSF, Lenogastrim) at a dose of 5 mg/Kg/day. Following treatment, a CT scan was performed to evaluate response, finding a calcification of the mass without significant reduction of the overall size. Because CT was inconclusive in the assessment of response to therapy, a 18F-FDG PET scan was performed. The 18F-FDG PET scan did not show any pathological uptake in the mediastinum but revealed a splenic and bone marrow diffusely increased 18F-FDG uptake. The differential diagnosis included a secondary effect induced by G-CSF therapy as one of the main possibilities, but other possibilities such as a malignant infiltration by lymphoma could not be discarded. Therefore, a second 18F-FDG PET scan was performed 3 months later. This study showed no pathological findings, with a normal 18F-FDG uptake in the spleen and bone marrow. Thus, the benign and reactive nature of the splenic and bone marrow 18F-FDG increased uptake found in the previous study was confirmed. We consider that the stimulating effect that G-CSF therapy has on the spleen and bone marrow must be taken into account when performing a 18F-FDG PET scan, as it can be an important source of false-positive results.     

继发性骨淋巴瘤的18F-FDG PET/CT影像学表现

目的 探讨继发性骨淋巴瘤在18F-FDG PET/CT显像中的影像学特点。 方法 对2012年4月至2015年6月行全身18F-FDG PET/CT显像的46例继发性骨淋巴瘤患者的PET/CT影像学表现进行回顾性分析。并将骨髓穿刺结果分为阳性和阴性两组,对两组显像相应穿刺部位（髂棘）SUV进行独立样本t检验,同时绘制穿刺部位SUV诊断继发性骨淋巴瘤的受试者工作特征曲线（ROC）。 结果 46例继发性骨淋巴瘤患者中,霍奇金淋巴瘤6例、非霍奇金淋巴瘤40例;单发10例,多发18例,全身弥漫分布18例。46例患者骨质异常表现多样,其中,骨髓浸润型31例（67.40%）、混合型10例（21.74%）、硬化型3例（6.52%）、溶骨型2例（4.34%）。46例患者中肱骨或股骨受累32例（69.57%）,均为骨髓浸润型表现。骨髓穿刺阳性组及阴性组SUV独立样本t检验结果显示t=4.036,P < 0.001,提示两组差异有统计学意义。穿刺部位SUV诊断继发性骨淋巴瘤的ROC曲线结果显示SUV诊断界值为2.35,其诊断继发性骨淋巴瘤的特异度和灵敏度分别为83.3%和80.0%。 结论 继发性骨淋巴瘤的18F-FDG PET/CT影像学表现存在一定的特征性,在该病的诊断与鉴别诊断中具有重要的临床价值,且对骨髓穿刺部位的选择具有指导意义。