We describe an unusual presentation of a congenital mesoblastic nephroma in a 5-month-old boy. He was in hemodynamic shock in admission. Sonography revealed an echogenic right kidney and hemoperitoneum. Right nephrectomy was performed, and he is well one year later without any further treatment.

Intussusception was seen on abdominal sonography and computed tomography in a 15-year-old boy who presented with a 6-week history of weight loss, vomiting, abdominal pain, abdominal mass, and hyperamylasemia. Laparotomy revealed a chronic gastroduodenal intussusception, the lead point of which was an antral myoepithelioma, a rare entity in this age group.

Endodermal sinus tumors (EST) are highly malignant lesions with a tendency to recur locally and with a high incidence of metastatic disease at the time of diagnosis. The clinical and radiographic spectra of 24 patients with extragonadal EST are reported. There were 17 females and seven males and the mean age of presentation was 21 months. The primary lesion occurred in the sacrococcygeal region in 16 patients; in the vagina in two patients; in the anterior mediastinum in two patients; and in the bladder, liver, nasopharynx and posterior cranial fossa in one patient each. Computed tomography (CT) is the most accurate study in delineating the extent of primary lesions particularly in the pelvis and head and neck and also for demonstrating metastatic disease in the lungs. Singificant improvement in survival rates is obtained with a combination of surgery, chemotherapy and radiotherapy.