| thorn apple crystals | Ammonium urate crystal's in the shape of rounded bodies with many projecting points. (05 Mar 2000) |
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| urate crystals stain | <technique> A stain using silver methenamine to detect crystals, which polarise light in contrast with calcium crystals; useful in diagnosing gout and kidney infarcts resulting from uric acid build-up. (05 Mar 2000) |
| Florence's crystals | Brown rhombic crystal's formed at the interface between a drop of Lugol's solution and a drop of fluid that contains semen; not a specific test for the latter. (05 Mar 2000) |
| Leyden's crystals | Crystal's in the shape of elongated double pyramids, formed from eosinophils, found in the sputum in bronchial asthma and in other exudates or transudates containing eosinophils. Synonym: asthma crystals, Charcot-Neumann crystals, Charcot-Robin crystals, Leyden's crystals. (05 Mar 2000) |
| Lubarsch's crystals | Intracellular crystal's in the testis resembling sperm crystal's. (05 Mar 2000) |