Fractured submandibular gland: CT findings.

A patient presented 12 h following trauma with a slowly expanding neck mass. Both CT and sialographic evaluation demonstrated a fracture of the left submandibular gland.

Immunoperoxidase technique on paraffin sections fails to demonstrate immunoglobulin deposition in cutaneous lesions from patients with dermatomyositis.

Nine formalin-fixed paraffin sections of skin biopsy specimens of patients with clinically and histologically proven dermatomyositis were studied using the avidin-biotin immunoperoxidase technique. No evidence of dermoepidermal junction or perivascular IgG, IgA, or IgM deposits were noted. These findings may be related to loss of antigenicity during the fixation process or to the small amount of immunoglobulin deposit previously reported in dermatomyositis. The negative findings demonstrate an inability to use this technique to find immunoglobulin deposition retrospectively in dermatomyositis.