Massive squamous cell carcinoma arising from hidradenitis suppurativa with marked hypercalcemia and neutrophilia - Haruka Uehara, MD; Sayaka Yamaguchi, MD, PhD; Kyoko Fukai, MD; Takuya Omine, MD; Takuya Miyagi, MD; Kenzo Takahashi, MD, PhD (Elsevier, 2022)