Case 167. Lyme borreliosis (56 y-o M)

　 　 　 　
　 Biopsy from erythema chronicum migrans on the abdomen around the site of tick bite, that happened in a highland of Nagano 　
　 　 　 　

　

 　 Histologic features are nonspecific. Perivascular infiltration of small lymphocytes and some plasma cells is seen in the entire thickness of the dermis (HE). Warthin-Starry's silver was negative.