Tacalcitol in the treatment of acquired perforating collagenosis.

Acquired perforating collagenosis (APC) is a rare perforating dermatosis characterized by transepidermal collagen elimination. We describe a 65-year-old patient, with long-standing type 2 diabetes mellitus and a 2-year history of itchy hyperkeratotic nodules situated on the back, who was subsequently diagnosed with APC. Treatment included topical corticosteroids and antihistamines, without improvement of the lesions.

Negative effect of immunosuppressive therapy in the performance of the QuantiFERON gold in-tube test in patients with immune-mediated inflammatory diseases.

To compare the tuberculin skin test (TST) and QuantiFERON-TB Gold In-Tube test (QFG) for the detection of latent tuberculosis infection among patients with immune-mediated inflammatory diseases before antitumor necrosis factor-α therapy. A prospective study including 153 consecutive patients with rheumatoid arthritis (n = 53), psoriasis (n = 45), inflammatory bowel disease (n = 25), and spondyloarthropathy (n = 22) were included. QFG and TST were performed simultaneously.