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"Latar Belakang: Hubungan antara hepatitis C dan penyakit ginjal kronik (PGK) sudah semakin jelas. Sirosis hati dan kadar virus pada hepatitis C dikatakan berhubungan dengan PGK, namun hal ini masih menjadi kontroversi.Tujuan: Mengetahui prevalensi PGK serta hubungannya dengan sirosis hati dan kadar virus pada pasien hepatitis C.Metode: Penelitian ini merupakan studi potong-lintang yang dilakukan pada Agustus 2018 sampai Januari 2019 di Poliklinik Hepatologi Rumah Sakit Cipto Mangunkusumo (RSCM), Jakarta, Indonesia. Subjek dipilih secara konsekutif pasien dengan antiHCV positif dan ditanyakan kesediannya. Subjek dengan HIV, hepatitis B, riwayat hemodialisis, dan batu ginjal dieksklusi. Data diambil melalui anamnesis, pemeriksaan fisik, elastrografi transien, pemeriksaan darah dan urin. Pasien didiagnosis PGK bila terdapat kelainan laju filtrasi glomerolus at au albuminuria atau hematuria persisten selama tiga bulan. Analisis statistik menggunakan kai kuadrat untuk data kategorik dan menggunakan regresi logistik untuk mengendalikan variabel perancu.Hasil: Dari total 185 subjek yang mengikuti penelitian ini didapatkan prevalensi PGK sebesar 23,2% dengan 95% IK 17,12-29,28% pada subjek dengan hepatitis C. Sirosis hati berhubungan dengan terjadinya PGK pada hepatitis C dengan crude OR 2,786 (1,276-6,081) dan adjusted OR 2,436 (1,057-5,614) setelah mcngendalikan diabetes melitus, usia, dan jenis kelamin. Tidak didapatkan hubungan antara kadar virus dengan PGK (p=0,632).Simpulan: Terdapat hubungan antara sirosis hati dengan PGK dan tidak terdapat hubungan antara kadar virus dengan PGK pada pasien dengan hepatitis C."

"The first observation of cold-induced precipitation of serum proteins dates back to 1933, when Wintrobe and Buell first described an unusual case of multiple myeloma in a woman whose serum reversibly precipitated at cold temperatures. In 1947 Lerner and Watson showed cold-precipitable proteins to be gammaglobulins and called them ‘cryoglobulins’ and the corresponding clinical condition ‘cryoglobulinemia’. Meltzer and Franklin in 1966 provided an accurate description of the typical clinical symptoms associated with cryoglobulinemia, showed that they consisted of two different globulin components and, because of the ignorance on its etiology, called this clinical condition ‘essential mixed cryoglobulinemia’. For almost 20 years progress has been rather slow in this field, but when at the end of the ‘80s it finally became possible to detect the occurrence in the serum of antibodies to the hepatitis C virus (HCV), many groups in Europe and the United States almost simultaneously reported that a high proportion of ‘essential’ cryoglobulinemias are in fact associated with HCV infection. This hallmark has resulted in a new impetus and great enthusiasm in carrying out new researches made possible by the awareness that cryoglobulinemia is to be considered an undisputable extrahepatic manifestation of HCV infection. In addition, the evidence that HCV has tropism for hepatocytes and lymphocytes has stimulated new approaches to the autoimmune phenomena and the potential transformation in non-Hodgkin’s lymphomas which not infrequently can be discovered in these patients. The same applies to the obvious therapeutic implications, once the association between HCV infection and mixed cryoglobulinemia has been firmly established. It was thus felt that times were ripe to produce a state-of-the-art survey of the multi-faceted picture of cryoglobulinemia. This book is indeed unique in the detail of its presentation, its completeness and its fundamental approach to the subject. The most qualified authors have been invited to contribute critical articles reviewing significant developments related to each of the eight sections in which the whole treatment has been divided: from basic mechanisms governing interactions between HCV and the immune system to the immunochemical characterization of cryoglobulins and the frequently concomitant serological abnormalities; from genetic features and the role of certain cytokines and chemokines to the cellular compartments of HCV infection and replication; from the clinical manifestations of cryoglobulinemic patients and their potential susceptibility to develop non-Hodgkin’s lymphoma to conventional treatment of the syndrome and the newer, promising therapeutic advances. The reader will appreciate the immediacy of style, the striking illustrations, and the color plates. In addition, the comprehensive review of a systemic disease such as cryoglobulinemia will interest basic scientists and specialists involved in several disciplines, including internal medicine, hepatology, hematology, oncology, infectious diseases, rheumatology, nephrology and dermatology. General practitioners, graduate and post-graduate students will also find in this book an irreplaceable source of update in this fascinating field."