Benign Böbrek Tümörleri
Özet
Günümüzde görüntüleme yöntemlerinin yaygınlaşmasıyla benign böbrek tümörlerinin tanısı artmıştır. En sık izlenen kitleler olan basit böbrek kistleri genellikle asemptomatiktir ve malignite riskini belirlemek için Boşniak sınıflandırması kullanılır. Klinik semptomu olmayan Boşniak I-II kistlerine müdahale gerekmezken, ileri evrelerde cerrahi veya takip tercih edilir. İyi huylu heterojen tümörler olan anjiyomiyolipomlar (AML); düz kas, kan damarı ve yağ dokusundan oluşur; sporadik veya tüberoskleroz kompleksiyle ilişkili gelişebilir. AML yönetiminde aktif gözlem, embolizasyon, ablasyon veya mTOR inhibitörleri kullanılır. Katı kitlelerin önemli bir kısmını oluşturan renal onkositomlar genellikle iyi huyludur, ancak preoperatif olarak renal hücreli karsinomdan (RHK) ayırt edilmeleri zordur ve kesin tanı biyopsi veya cerrahiyle konur. Düz kas hücrelerinden köken alan nadir mezenkimal tümörler olan leiomyomlar ile ilkel metanefrik tübüler hücrelerden oluşan metanefrik adenomlar da genellikle asemptomatiktir. Her iki tümörün ayırıcı tanısında immünohistokimyasal paneller ve radyolojik yöntemler kullanılsa da kesin tanı cerrahiyle konur. Boyutu 4 cm'den küçük iyi huylu solid kitlelerde parsiyel nefrektomi, büyüklerde ise radikal nefrektomi standart tedavi seçeneğidir.
With the widespread use of imaging modalities today, the diagnosis of incidental benign renal tumors has increased. Simple renal cysts, the most frequently observed benign masses, are generally asymptomatic, and the Bosniak classification is utilized to determine their malignancy risk and guide management. While no intervention is required for asymptomatic Bosniak I and II cysts, regular follow-up or surgical interventions are performed for higher categories. Angiomyolipomas (AMLs) are benign, heterogeneous neoplasms consisting of smooth muscle, blood vessels, and adipose tissue, which can occur sporadically or in association with tuberous sclerosis complex. The management of AMLs includes active surveillance, selective embolization, ablation, or mTOR inhibitors depending on the risk of life-threatening hemorrhage. Renal oncocytomas constitute a significant portion of solid renal masses; they are mostly benign but difficult to differentiate preoperatively from renal cell carcinoma (RCC), requiring percutaneous biopsy or surgery for a definitive diagnosis. Renal leiomyomas, rare mesenchymal neoplasms originating from smooth muscle cells, and metanephric adenomas, composed of primitive metanephric tubular cells, are also generally asymptomatic and incidentally identified. Although immunohistochemical profiles and advanced radiological assessments help differentiate these masses from malignant counterparts, definitive diagnoses are established through surgery, where partial nephrectomy is preferred for tumors smaller than 4 cm and radical nephrectomy is indicated for larger masses.
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