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Crytsals
Clinical Microscopy
| Question | Answer |
|---|---|
| excretion of crystals is termed as | crystalluria |
| acid crystal that is fluffy orange or pink sediment (brick dust) due to uroerythrin | Amorphous urates |
| Yellow brown granules | Amorphous urates |
| soluble in heat and alkali | Amorphous urates |
| most pleomorphic | Uric acid |
| rhombic (diamond), lemon shaped | Uric acid |
| hexagonal forms may be mistaken as cystine crystals | Uric acid |
| the most frequently observed urinary crystal | CaOx |
| Dihydrate | weddellite |
| monohydrate | whewellite |
| cigarette-butt appearance | calcium sulfate |
| yellow-brown/ colorless elongated prism | Hippuric acid |
| most common cause of turbidity in alkaline urine | amorphous phosphates |
| solule in dilute acetic acid | amorphous phospates |
| seen in old specimens | ammonium biurate |
| yellow-brown "thorny apples" | Ammonium biurate |
| colorless, prism, coffin-lid, fern-leaf, feathery | triple phosphate / struvite |
| end or corner may be notched | Magnesium phosphate |
| flat plates, thin prisms in rosette form | Apatite, CaPhosphate |
| rosettes may resemble | sulfonamide crystals |
| small, colorless, dumbbell, tetrads or spherical-shaped | Ca Carbonate |
| forms gas (effervescence) after adding acetic acid | Ca Carbonate |
| misidentified as bacteria | Ca Carbonate |
| colorless, refractile hexagonal plates, often laminated | Cystine |
| mistaken as hexagonal uric acid crystals | Cystine |
| positive cyanide-nitroprusside reaction | Cystine |
| rectangular plate with notch in one or more corners (staircase pattern) | Cholesterol |
| flat, four-sided plates often with a notched corner | radiographic dye |
| fine colorless to yellow needles in clumps or rosettes | Tyrosine |
| increase in liver disease, more commonly found than leucine | tyrosine |
| yellow brown oily-looking spheres w/ concentric circles & radial striations | leucine |
| precipitated with tyrosine after adding alcohol | leucine |
| sofa pillow | leucine |
| clumped granules or needles with bright yellow color | bilirubin |
| fan-shaped needles, sheaves of wheat, rosettes, arrowhead, petals, round-shaped, whetstones | sulfonamide |
| colorless needles that tend to form bundles following refrigeration | ampicillin |
| spheres with dimpled center | starch granules |
| Maltese cross formation | OFFS Oval Fat Bodies, Fatty Cast, Fat Droplets, Starch granules |
| spheres with cell wall & concentric circles | pollen grains |
| artifacts mistaken for casts | hair and fibers |
Created by:
CohenJanie