Na Yeon Han

Gastrointestinal tract involvement in undifferentiated pleomorphic sarcoma (UPS) is extremely rare. To the authors’ knowledge, only 21 cases of primary small bowel UPS have been reported in the literature available in English. Reported CT findings in primary small bowel UPS have been nonspecific, and MRI findings have been reported in only one case. The present article describes a case involving a 72-year-old male with histologically confirmed primary UPS arising from the ileum, focusing on both

Schwannoma is a benign nerve sheath tumor that involves Schwann cells mostly found in the head, neck, posterior mediastinum and extremities. Schwannoma develops rarely in the retroperitoneum; thus, renal schwannoma is extremely uncommon. Differentiation of renal schwannoma from renal cell carcinoma is difficult with radiologic analysis. A few cases of these tumors have been reported in literature, and little has been described regarding imaging appearances. In this study, we present a rare case

Obstructed hemivagina and ipsilateral renal anomaly (OHVIRA) syndrome is anuncommon congenital abnormality of the female urogenital tract characterized bythe triad of uterine didelphys, obstructed hemivagina, and ipsilateral renal agenesis. A 13-year-old female presented with acute lower abdominal pain. Magneticresonance imaging (MRI) revealed uterine didelphys, hematometrocolpos, obstructedhemivagina, and right ipsilateral agenesis, consistent with OHVIRA syndrome. Also, awell-defined mass with

Malakoplakia is a rare chronic inflammatory condition that results from defective phagolysosomal activity. Malakoplakia usually affects the urinary tract, and immunosuppression is a predisposing factor in most patients. A 78-year-old woman undergoing long-term steroid treatment presented with right flank pain. CT demonstrated a large, multilocular cystic mass with focal enhancing solid portion in the right kidney and retroperitoneum. The patient underwent ultrasonography-guided biopsy for enhanc

The spleen is frequently referred to as the "silent and forgotten" organ of the abdomen by clinicians and radiologists, primarily because of the secondary nature of most splenic pathologies and their relative rarity compared with hepatic diseases. Nevertheless, the term splenomegaly frequently appears in radiological reports. Although it is often reported in the context of a known underlying cause, it is also commonly used as a purely descriptive term without reference to the underlying etiology

Purpose: To evaluate the association between the incidence of pulmonary metastasis on chest CT and the location of the primary tumor on rectal MRI. Materials and Methods: One hundred and nine consecutive patients with rectal adenocarcinoma underwent chest CT and 3T rectal MRI. Two radiologists classified the tumor on MRI as an upper (> 10 cm from the anal verge), mid (5-10 cm), or lower rectal tumor (< 5 cm) by consensus. All chest CT scans were retrospectively reviewed for the presence of metas

Purpose: To describe the characteristics of residual contrast enhancement (CE) in cryoablated renal cell carcinoma (RCC) with regard to eventual resolution and the presence of residual tumor on follow-up CT and MRI. Materials and Methods: 22 patients with 24 RCCs underwent laparoscopic renal cryoablation and follow-up CT (n = 19) and MRI (n = 3) for a mean of 28 months. Two radiologists retrospectively assessed the CT and MRI images for the tumor size and characteristics of residual CE in the cr

Progressive transformation of germinal centers (PTGC) is an atypical feature seen in lymph nodes with unknown pathogenesis. PTGC most commonly presents in adolescent and young adult males as solitary painless lymphadenopathy with various durations. Cervical nodes are the most commonly involved ones while involvements of axillary and inguinal nodes are less frequent. PTGC develops extremely rarely in other locations. We report a rare case of solitary mass present in the presacral space. The mass

Concurrent renal cell carcinoma (RCC) and angiomyolipoma (AML) is a very rare condition, especially in patients without underlying tuberous sclerosis. We present three patients with concurrent RCC and AML in the ipsilateral kidney. Concurrent RCC is difficult to differentiate radiologically from a non-fatty component of an AML because they share several imaging findings. However, several noticeable ra- diologic features are helpful in the diagnosis of suspected cases. This report of two cases hi

고환 밖에서 발생하는 표피양 낭종은 매우 드문 질환이다. 본 증례에서는 70세 남성에서 발생한 고환외 표피양 낭종의 초음파와 자기공명영상 소견을 보고하고자 한다. 초음파에서 내부에 산재된 반사체 에코를 포함한 저에코의경계가 좋은 종괴가 음낭에서 관찰되었고 자기공명 T2 강조 영상에서 고신호 강도, T1 강조영상에서 저신호 강도,확산 강조 영상에서 확산 제한을 나타낸 낭성 종괴가 보였다.

Adenosarcoma of the uterus is a rare biphasic tumor containing benign glandularepithelial and malignant mesenchymal components. The tumor has been reportedto be associated with antiestrogen therapy, particularly tamoxifen, but there havebeen a few case reports with MRI. We present two cases of MRI findings of uterineadenosarcoma after antiestrogen therapy, tamoxifen and toremifene in breast cancerpatients. The tumor presents as a large polypoid mass occupying the endometrialcavity, and may protr

항문회음부 결핵은 드문 폐외결핵의 형태로 때때로 농양을 형성할 수도 있다. 저자들은 회음부에서 촉지되는 종괴로 시행한 자기공명영상에서 T1강조 자기공명영상에서 저신호 강도, T2강조 자기공명영상에서 고신호 강도 그리고 확산강조영상에서 확산 제한을 보인 항문회음부 결핵성 농양 1예를 경험하였기에 이를 보고하고자 한다.

Purpose: To evaluate the correlation between pathological and computed tomography (CT) findings of gastrointestinal stromal tumors (GISTs) after imatinib mesylate (imatinib) treatment. Materials and Methods: Twenty-six patients with GIST (17 men, 9 women; mean age, 56 years) who underwent treatment with imatinib and who were registered at our institution were included. Eight patients had primary and 18 had metastatic tumors. The correlation between CT and pathological findings was evaluated for

Purpose: To assess gallbladder (GB) wall thickening and periportal tracking on CT in patients with acute pyelonephritis (APN) by each kidney involvement. Materials and Methods: A total of 117 patients diagnosed with APN by clinical examination and CT were included in this retrospective study. The patients were divided into three groups based on kidney involvement seen on CT: right APN, left APN, and bilateral APN. Two radiologists reviewed CT images in consensus for the presence of diffuse GB wa