BACKGROUND Practically, all complications of kidney biopsy are connected with hemorrhage. In the last years, the use of color Doppler sonography in monitoring kidney biopsies was being described, later the possibility of using power Doppler (PD) in performing kidney biopsies was presented. PD depicts the amplitude, or power, of Doppler signals rather than the frequency shift. This allows detect...

Extramedullary hematopoiesis (EMH) is hematopoiesis in organs outside the bone marrow and most frequently occurs in the liver, spleen, and lymph nodes. We report a case of perirenal EMH revealed by kidney biopsy in a patient with primary myelofibrosis. We observed only bilateral kidney enlargement with plain computed tomography (CT) and ultrasonography before obtaining a renal biopsy. We obtain...

Monoclonal gammopathy with undetermined significance (MGUS) carries a risk of progression to multiple myeloma, and progression is usually diagnosed with changes in M-protein or bone marrow biopsy. We report a case of 62-year-old female patient showing MGUS progression to multiple myeloma without significant changes in M-protein but diagnosed by kidney biopsy. During the follow-ups, azotemia and...

Acute renal failure may complicate the course of a hematologic malignancy but is a highly unusual finding in patients with chronic myelomonocytic leukemia. Kidney biopsy is rarely performed in this setting, and the pathologic substrate underlying kidney injury is not well identified. We present a case of a biopsy-proven acute tubulo-interstitial nephritis due to massive infiltration of neoplast...

A 23-year-old Japanese woman was admitted with asymptomatic proteinuria and hematuria. An ultrasound-assisted percutaneous renal biopsy was performed. Three days later she experienced sudden-onset left back pain when picking up a heavy bag. Contrast-enhanced abdominal computed tomography demonstrated a cloverleaf compression of the left renal parenchyma caused by a subcapsular hematoma (Picture...

abstract pseudoxanthoma elasticum is a rare, hereditary, multisystemic disease affecting the skin, eye, and cardiovascular system. renal involvement is uncommon. we describe two cases of pseudoxanthoma elasticum (pxe) in two women with distinctive skin lesions and nephrocalcinosis that renal ultrasonography showed a characteristic pattern of dotted increased echogenicity in the corticomedullary...