一个IgA瘤病例与膜扩散性淋巴结膜炎等特征
Miyu Kanazawa1,2, Kenji Tsuji2, Ryoya Aoki2
1Okayama University Medical School, Okayama, Japan.
Nephrology (Carlton, Vic.)
|May 15, 2025
概括
这一案例突出显示了IgA脏病,呈现为脏病综合征,具有类似膜增殖性淋巴结膜炎 (MPGN) 的特征. KM55染色有助于诊断这种非典型的IgA脏病,该病例对类固醇治疗反应良好.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 免疫病理学 免疫病理学
- 类风湿病学 类风湿病学
背景情况:
- 一名73岁的男性有风湿性关节炎病史,患有脏范围蛋白尿症.
- 最初的表现包括蛋白尿和血液尿,进展到性综合征.
- 以前的类风湿性关节炎治疗方法包括甲状腺和Janus kinase (JAK) 抑制剂.
研究的目的:
- 报告一种IgA瘤病例,具有类似膜增殖性球体炎 (MPGN) 的特征,呈现为瘤综合征.
- 评估Gd-IgA1 (银糖缺乏IgA1) 特定抗体 (KM55) 染色在诊断非典型IgA病中的有用性.
- 讨论在这种情况下的诊断挑战和治疗反应.
主要方法:
- 用光显微镜,免疫光显微镜和传输电子显微镜进行脏活检.
- 使用特定于Gd-IgA1.1.的KM55抗体进行免疫染.
- 蛋白尿,血清白蛋白和对类固醇治疗的反应的临床评估.
主要成果:
- 脏活检揭示了带有双轮底层膜的中和内细胞增殖,与MPGN一致.
- 免疫光学显示出IgA主导的沉积物,电子显微镜证实了电子密度沉积物.
- KM55免疫染是积极的,支持IgA脏病的诊断与MPGN类似的特征.
- 患者在开始类固醇治疗后5个月内实现了蛋白尿完全缓解.
结论:
- 具有MPGN类特征的IgA脏病可能异常呈现为脏病综合征,这带来了诊断挑战.
- 染色KM55可能有价值在区分这些非典型病例从二级MPGN和其他质细胞病变.
- 在这种情况下,迅速诊断和使用类固醇治疗可以带来有利的结果.
相关概念视频
01:10Nephrons
1.7K
The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
1.7K
01:20Renal Corpuscle
1.3K
The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
1.3K
01:15Glomerular Filtration
754
The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
754
01:28Glomerular Filtration Rate and its Regulation
1.9K
The Glomerular Filtration Rate (GFR) is a measure of kidney function, reflecting the volume of filtrate formed per minute in the kidneys. On average, GFR is approximately 125 mL/min in males and 105 mL/min in females. Maintaining a relatively constant GFR is essential for the kidneys to effectively regulate body fluid homeostasis and maintain extracellular stability.
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
1.9K
01:32Filtration and Urine Formation
47.9K
The function of the kidneys is to filter, reabsorb, secrete, and excrete. Every day the kidneys filter nearly 180 liters of blood, initially removing water and solutes but ultimately returning nearly all filtrates into circulation with the help of osmoregulatory hormones. This process removes wastes and toxins but is also crucial to maintain water and electrolyte levels. Most of these functions are performed by the tiny but numerous nephrons contained within the kidneys.
47.9K
01:02Renal Drug Excretion: Glomerular Filtration
103
The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production occurs. A nephron has two main components: a renal corpuscle and a renal tubule.
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
103