Renal angiomyolipoma with bleeding

Evaluation of T1-Weighted MRI to Detect Intratumoral Hemorrhage Within Papillary Renal Cell Carcinoma as a Feature Differentiating From Angiomyolipoma Without Visible Fat

“…Unlike classic AML, which may present with spontaneous hemorrhage (with increased risk of hemorrhage occurring in AMLs > 4 cm) [31][32][33], AMLs without visible fat do not, to our knowledge, present with hemorrhage; are predominantly composed of smooth muscle [5,6]; and are typically discovered incidentally when sporadic. Conversely, on histopathologic analysis, RCCs commonly show internal hemorrhage, and of the various RCC subtypes, papillary RCC most frequently shows intratumoral hemorrhage [34,35].…”

Fortuitous detection of adult malrotated ectopic kidney during acute appendicitis: A unique case report

“…Furthermore, our patient also presented with renal malrotation, a commonly associated anomaly with renal ectopia, as both conditions typically develop simultaneously during embryogenesis [ 7 , 8 ].…”

Vascular and Urinary Tract Anatomic Variants Relevant to Para-Aortic Lymphadenectomy in Women with Gynecological Cancers

“…During embryonic development, the kidneys ascend and rotate anteromedially. If malrotation occurs, there is an abnormal position of the kidney, which can be unilateral or bilateral [38]. A common ectopia in the renal position is the pelvic kidney, which occurs in 1/3000 autopsies.…”

“…At the fourth week of gestation, the kidneys are close together and the hilum is anterior in the pelvis. At the ninth week of gestation, there is an ascent and a 90-degree rotation occurs, and the kidneys are spaced apart with the hilum directed anteromedially [38]. When malrotation occurs, variants are classified as nonrotation, incomplete rotation, reverse and transverse rotation, or over-rotation, with nonrotation and incomplete rotation being the most common [40].…”