In 42 patients with hidradenitis suppurativa surveyed, ten associated instances of marked anemia were found. Any patient with a concomitant systemic disease was eliminated from the study. All ten patients with marked anemia had severe hidradenitis suppurativa a minimum of two years. The 42 cases of hidradenitis suppurativa reviewed were consecutive and not selected for duration. Further studies on the relationship between hidradenitis suppurativa and anemia are indicated.
Tennant F, Bergeron JR, Stone OJ, Mullins JF. Anemia Associated With Hidradenitis Suppurativae. Arch Dermatol. 1968;98(2):138-140. doi:10.1001/archderm.1968.01610140036007