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Food signs in radiology

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Food signs in radiology

  1. 1. Dr. Vikram Patil JSS Medical College , Mysore
  2. 3. <ul><li>Characteristic of sigmoid volvulus , consists of greatly distended, air filled loop of sigmoid colon extending from pelvis. </li></ul><ul><li>The apposed medial walls of the dilated bowel form a distinct oblique line that resembles the cleft of a coffee bean. </li></ul>
  3. 5. <ul><li>Amorphous,cloudlike calcifications that resemble kernels of popcorn. </li></ul><ul><li>Seen in pulmonary hamartomas. </li></ul><ul><li>Other causes- </li></ul><ul><ul><li>Fibroadenoma breast </li></ul></ul><ul><ul><li>Calcification in cartilaginous or chondroid lesions. </li></ul></ul>
  4. 7. <ul><li>In achondroplasia, the iliac blades are flattened, giving rise to a pelvic inlet that resembles a champagne glass. </li></ul><ul><li>The acetabular angles are increased, and the sacrosciatic notch is small. </li></ul>
  5. 9. <ul><li>Characterized by a pattern of coarse reticular interstitial areas of increased opacity with intervening cystic spaces. </li></ul><ul><li>Represents the end results of many interstitial lung diseases. </li></ul>
  6. 11. <ul><li>Classical finding seen in Colle’s fracture of radius. </li></ul><ul><li>The dorsal displacement and angulation of the radius results in contour similar to dinner fork on lateral projection. </li></ul>
  7. 13. <ul><li>Bone proliferation at sites of tendinous and ligamentous insertion. </li></ul><ul><li>Cervical and thoracic spine in particular are affected. </li></ul><ul><li>Florid, flowing ossification is noted along the anterior or right anterolateral aspects of at least 4 contiguous vertebrae. </li></ul><ul><li>Disc spaces are usually well preserved. </li></ul>
  8. 15. <ul><li>Tapering of the tips of the metacarpals, metatarsals, phalanges or clavicles. </li></ul><ul><li>Associated with 1.Psoriatic arthropathy </li></ul><ul><li>2.Leprosy </li></ul><ul><li>3.Rheumatoid arthritis </li></ul>
  9. 17. <ul><li>Salt and pepper skull seen in hyperparathyroidism. </li></ul><ul><li>Salt & pepper appearance is also seen in </li></ul><ul><ul><li>Sjogren’s syndrome </li></ul></ul><ul><ul><li>Pheochromocytoma </li></ul></ul><ul><ul><li>Carotid body tumour </li></ul></ul><ul><ul><li>Vertebral hemangioma </li></ul></ul>
  10. 19. <ul><li>Shell like calcification in the periphery of the node. </li></ul><ul><li>Hilar nodes are predominantly involved, but mediastinal, cervical and intraperitoneal nodes may be affected. </li></ul><ul><ul><li>Silicosis </li></ul></ul><ul><ul><li>Sarcoidosis </li></ul></ul><ul><ul><li>Coal workers pneumoconiosis. </li></ul></ul><ul><ul><li>Post radiation Lymphoma </li></ul></ul>
  11. 21. <ul><li>MRI appearance of a partially herniated liver through the ruptured hemi diaphragm. </li></ul><ul><li>Resembles a traditional bread prepared in England. </li></ul>
  12. 23. <ul><li>The areas of increased opacity are said to resemble millet seeds. </li></ul><ul><li>Differentials: </li></ul><ul><ul><li>Miliary TB </li></ul></ul><ul><ul><li>Fungal infections. </li></ul></ul><ul><ul><li>Sarcoidosis. </li></ul></ul><ul><ul><li>Eosinophilic granuloma. </li></ul></ul><ul><ul><li>Metastatic disease [particularly from thyroid tumors, melanoma & choriocarcinoma] </li></ul></ul>
  13. 25. <ul><li>Calcified cysticerci within the muscles produce ovoid flecks of calcification parallel to the long axis of muscles. </li></ul><ul><li>Resembles rice grain. </li></ul>
  14. 27. <ul><li>Seen at breast MR imaging and characterized by fine, curvilinear low signal intensity strands within the gel of breast implants that have ruptured. </li></ul><ul><li>Best visualized on T2 MR. </li></ul><ul><li>Lines >3cm in length seen on multiple consecutive images indicate implant rupture. </li></ul>
  15. 29. <ul><li>Normally at axial CT, the vertebral facet(apophyseal) joint looks like a hamburger. </li></ul><ul><li>When the facet joint is dislocated, the articular facets become uncovered or naked also called “naked facet sign”. </li></ul><ul><li>This CT sign is characteristic of flexion-distraction injury and indicates severe ligamentous disruption and spinal instability. </li></ul>
  16. 31. <ul><li>Lamellated periosteal reaction in which multiple concentric layers of new bone are laid down. </li></ul><ul><ul><li>Acute osteomyelitis. </li></ul></ul><ul><ul><li>Osteosarcoma. </li></ul></ul><ul><ul><li>Ewing tumor. </li></ul></ul><ul><li>Multiple delicate layers of new bone represent alternating periods of rapid and slow growth. </li></ul>
  17. 33. <ul><li>Vertical striations of long bones or pelvis. </li></ul><ul><li>Seen in </li></ul><ul><ul><li>Osteopathia striata </li></ul></ul><ul><ul><li>Congenital rubella infection </li></ul></ul>
  18. 35. <ul><li>Seen at antenatal USG. </li></ul><ul><li>Associated with neural tube defects. </li></ul><ul><li>The cerebellum appears like a banana because it is wrapped around the posterior brainstem due to downward traction of the spinal cord. </li></ul>
  19. 37. <ul><li>Abnormal shaped head seen at antenatal ultrasound in second trimester. </li></ul><ul><li>The sign is a marker for open spina bifida seen in 98% cases. </li></ul>
  20. 39. <ul><li>Seen in trisomy 18 (Edward’s syndrome) and refers to the shape of the head. </li></ul><ul><li>Related to hypoplasia of the frontal lobes. </li></ul>
  21. 41. <ul><li>Bladder assumes the shape of a pear when it undergoes extrinsic compression due to excess tissue in pelvis. </li></ul><ul><li>Pelvic lipomatosis. </li></ul><ul><li>Pelvic hematoma. </li></ul><ul><li>Pelvic lymphadenopathy. </li></ul><ul><li>Extravasated urine. </li></ul><ul><li>Pelvic fluid collection. </li></ul>
  22. 43. <ul><li>The appearance of the intracranial saccular aneurysm on CT scan. </li></ul><ul><li>May occur in isolation or in association with polycystic kidneys or coarctation of aorta . </li></ul>
  23. 45. <ul><li>Annular carcinoma of colon produces focal circumferential thickening of the bowel wall, narrowing of colonic lumen, associated with shouldering. </li></ul><ul><li>On barium gives appearance of partially eaten apple. </li></ul>
  24. 47. <ul><li>Observed at scintigraphy in sub acute testicular torsion. </li></ul><ul><li>Preserved dartos perfusion creates a halo or donut shaped area of radiotracer uptake surrounding the photopenic testicle. </li></ul><ul><li>Resembles a “donut”. </li></ul>
  25. 49. <ul><li>Flattening of vertebral body. </li></ul><ul><li>Caused by compression fracture of the vertebral body. </li></ul><ul><li>May result from trauma or pathological fracture due to- </li></ul><ul><ul><li>Eosinophilic granuloma </li></ul></ul><ul><ul><li>Osteogenesis imperfecta </li></ul></ul><ul><ul><li>Tumor (metastasis, myeloma, lymphoma) </li></ul></ul>
  26. 51. <ul><li>Infiltration of the omental fat by material with soft tissue density. </li></ul><ul><li>Causes include </li></ul><ul><ul><li>Metastases- most commonly from ovary, stomach and colon. </li></ul></ul><ul><ul><li>Tubercular peritonitis </li></ul></ul>
  27. 52. Thank You Ref: Selections from the Buffet of Food Signs in Radiology, Clare J Roche et.al Radiographics Nov 2002.

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