tailieunhanh - Ebook Differential diagnosis in ultrasound (2nd edition): Part 2

(BQ) Part 2 book "Differential diagnosis in ultrasound" presents the following contents: Peritoneal and mesenteric masses, scrotum, testis and epididymis, prostate, breast, musculoskeletal system, orbit, neonatal and infant brain, neonatal and infant spine, gynecology and obstetrics. | _ Peritoneal and Chapter r__t Mesenteric 11 Masses ROUND SOLID MASSES IN MESENTERY 1. Metastasis 2. Lymphoma 3. Leiomyosarcoma. Metastasis from colon and ovary. Metastasis due to intraperitoneal seedlings are seen in primary mucinous tumors of ovary appendix colon and breast. Lymphoma Lymphoma may present as a endoexoenteric mass with a solid mass in the mesentery and adjacent small bowel mass. Leiomyosarcoma Of small bowel is most commonly seen in ileum. The large extrinsic component of the lesion is seen as a well-defined solid mesenteric mass with areas of necrosis. Neural tumors Lipoma Fibrous histiocytoma Hemangioma Desmoid tumors Mesenteritis Various conditions like Crohn s Tuberculosis Figs and trauma surgery and pancreatitis may cause inflammation and thickening of the mesentery which on US may appear as a focal echopoor mass. This may also be seen as a part of retroperitoneal fibrosis. 302 Differential Diagnosis in Ultrasound Figs and B US scans show chronic tubercular peritoneal collection in the pelvis Fig. US scan shows mesenteric thickening Peritoneal and Mesenteric Masses 303 ILL-DEFINED MASS Metastasis - Direct extension from adjacent neoplasm ovary uterus pancreas may infiltrate the mesentery. Lymphoma Infiltrating small bowel lymphoma is plaque like involvement of the bowel wall and may be associated with desmoplastic reaction involving the mesentery. The mesenteric lymph node involvement may be seen as an ill-defined component mass engulfing and encasing adjacent normal loops. Carcinoid Lymphoma Infiltrating small bowel lymphoma is plaque like involvement of the bowel wall and may be associated with desmoplastic reaction involving the mesentery. The mesenteric lymph node involvement may be seen as ill-defined confluent mass engulfing and encasing adjacent bowel loops. Fibromatosis Chronic or retractile mesenteritis fibrosing mesenteritis Retractile mesenteritis also called as chronic fibrosing mesenteritis or