indeterminate leprosy

Indeterminate leprosy is an early form that causes one to a few hypopigmented or, sometimes, erythematous macules. Sensory loss is unusual.

Approximately 75% of affected persons have lesions that heal spontaneously. In some, the disease may persist in this indeterminate form.

In those with weak immunity, the disease progresses to one of the other forms of leprosy.

Microscopy

In the indeterminate form, findings are nonspecific. Histiocytes and lymphocytes are scattered, with some concentration around dermal appendages and nerves. At times, an acid-fast bacillus can be observed in a nerve bundle. The number of dermal mast cells may be increased.

See also

 leprosy