林 秀行¹, 神崎 修一¹, 森 雅一¹, 牧野 謙二¹, 天本 祐平¹, 青木 繁², 森川 実³, 林 邦昭³

Hideyuki HAYASHI¹, Shuichi KOHZAKI¹, Masakazu MORI¹, Kenji MAKINO¹, Yuhei AMAMOTO¹, Shigeru AOKI², Minoru MORIKAWA³, Kuniaki HAYASHI³

¹国立長崎中央病院放射線科, ²国立長崎中央病院小児科, ³長崎大学放射線科

¹Department of Radiology, Nagasaki-Chuo National Hospital, ²Department of Pediatrics, Nagasaki-Chuo National Hospital, ³Department of Radiology, Nagasaki University School of Medicine

キーワード : Hyperechoic medulla, Kidney, Medullary nephrocalcinosis, Renal tubular acidosis, Ultrasonography

Although medullary nephrocalcinosis is uncommon in children, symptoms of primary distal renal tubular acidosis, a typical cause of medullary nephrocalcinosis during childhood, may start early in life. Nephrocalcinosis develops later, however. A 1-month-old baby with medullary nephrocalcinosis secondary to distal renal tubular acidosis is described here. Ultrasonography was useful in the diagnosis of this case.