A relative thrombocytosis and elevated mean platelet volume are features of gravitational disease

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Abstract
Platelet counts were obtained in 60 patients with gravitational ulceration (GU), 60 with gravitational eczema (GE), 56 with endogenous eczema (EE) and 60 normal controls. Mean platelet volume (MPV), a broad index of platelet size, was estimated in the last 40 patients in each group (29 with EE). Causes of a reactive thrombocytosis were excluded. Platelet counts were significantly higher in both gravitational groups than in the EE group or the normal controls (P = 0.001). Ulcer healing produced no significant changes in platelet count, and patients with non-gravitational ulcers had normal platelet counts. MPV was significantly higher in both gravitational groups than in controls after correction for platelet count, by analysis of co-variance (P = 0.01). These differences in platelet parameters in gravitational disease suggest a possible role for platelets in this disease, and platelet inhibiting therapy may be of value at an early stage in the development of the condition.