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Mortar & pestle sign Rheumatology A descriptor for marked resorption of distal phalanges–acroosteolysis, a radiologic finding typical of scleroderma DiffDx Severe burns with soft tissue contracture, 'black toe' disease–ainhum, hyperparathyroidism, neural leprosy, SLE, neuropathies–eg, DM, tabes dorsalis, progeria, psoriatic arthritis, PVC exposure, Reiter syndrome, rheumatoid arthritis, sarcoidosis. Cf Spade deformity.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.