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. 2022 Jan 21;10(5):1356–1364.e2. doi: 10.1016/j.jaip.2021.12.038

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Correlation between basal tryptase level (μg/L) and spontaneous IFN-γ production (SFCs/2 × 10⁵ CD3), as observed in ELISpot assays. n = 24 patients with CM, MIS, and ISM. Linear regression: r² = 0.44 (P < .0004). CM, Cutaneous mastocytosis; MIS, mastocytosis in the skin.