The patient is a 25-year-old Filipino who showed polymorphous eruption
s over the whole body, right ulnar nerve paresis, polyneuropathy and h
ypalgesia in the area of eruptions. Because the biopsy specimen showed
foam cells, histiocytes, epithelioid cells, many Mycobacterium leprae
and no giant cells, the diagnosis of borderline-lepromatous (BL) type
was made. The symptoms were improved by the administration of 300 mg/
day ofloxacin. Because the monotherapy using ofloxacin has been report
ed to be effective in all 5 previously reported cases of BL type lepro
sy, it may be recommended for a larger number of leprosy cases.