Inflammatory pseudotumor of the sigmoid colon mesentery: US and CT findings (2004:12b).

The concept of inflammatory pseudotumor has evolved from meticulous pathological studies; some of its histological features resemble a spindle-cell sarcoma. Despite the fact that it usually affects children and young adults, only limited numbers of childhood cases have been reported in the pediatric literature. Recognition of this rare entity is important because the clinical manifestations and radiological features may be indistinguishable from a malignant lymphoproliferative disorder. This entity has been reported to be anywhere in the body, including a variety of intra-abdominal organs. Although one of the most common intra-abdominal sites is the mesentery, localization within the mesentery of the sigmoid colon is particularly rare. We present a case of abdominal inflammatory pseudotumor of the sigmoid colon mesentery, defining its radiological and primarily ultrasound and Doppler ultrasound findings, with a review of additional examples from the literature.

[Review: Fetal risks in radiological examinations and estimated fetal absorption dose]. / Radyolojik incelemelerde fetus riski ve fetal abzorpsiyon dozunun tahmini.

There has been growing concern about radiation exposure in the case of pregnant women who undergo radiological examinations. Lack of knowledge is responsible for the great anxiety and probably unnecessary termination of pregnancies. The main effects of radiation on the human embryo and fetus are prenatal death, growth retardation, congenital malformations and mental retardation as well as stocastic effect in lower doses. Prenatal doses from most properly performed diagnostic procedures present no measurably increased risk of prenatal death, malformation or impairment of mental development over the background incidence of these entities. The dose received depends on mAs, but other parameters are necessary for calculation (film source distance, kV, filtration). To prevent accidental irradiation of the fetus, women must receive information about radiation effects, and the physician must choose a nonirradiating technique. Termination of pregnancy is an individual decision affected by many factors. Fetal doses below 50 mGy should not be considered a reason for terminating pregnancy. For a low dose procedure such as a chest X-ray, the only information that may be needed is a verbal assurance that the risk is judged to be low. When fetal doses are above 1 mGy and above, more detailed explanation is given.