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A. General Descriptions and Illustrations of Leprosy

(According to the Ridley-Jopling Classification)
Indeterminate Leprosy (I)
The skin lesions consist of a single flat macule, or a few macules in some cases, usually slightly hypopigmented or slightly erythematous; roughly oval or rounded in shape. Surface is even and may be smooth, minute markings and texture of the skin are usually not affected. Margins may be definite but, usually rather vague. The lesions are frequently noted

 

Tuberculoid Leprosy (TT)
This type of lesion is generally stable. Lesions are solitary or few in number; reddish or brownish or hypopigmented; oval or rounded in shape; well demarcated from the normal surrounding skin. Margins may be thinly elevated throughout or only in

 

Borderline Leprosy (B)
This group is very unstable comprising the BT, BBand BL types in the Ridley-Jopling scale of classification.
Skin lesions are succulent or firm, pleomorphic, uniformly thickened or with central clearing. The lesions may be few or numerous in number, reddish

 

BT (Borderline tuberculoid)
The skin lesions may be few or numerous, reddish or brownish or hypochromic; individual lesions may be elevated throughout or may have central clearing; margins well delineated from the normal surrounding skin. The surface may be smooth, but usually rough

 

BB (Borderline)
The skin lesions are few to numerous in number, reddish or brownish in color, rounded or oval in shape. Lesions are infiltrated throughout or with a central clear area or areas producing a punched out appearance, or may also appear as succulent thickened plaques or bands, with peripheral edges fading on exposed surfaces of the skin. Sensory loss over the macules is generally minimal, dissociated and may involve only sections of the macule. Bacteriologic smears are usually negative, occasionally slight positive. Mitsuda reaction is usually positive but may benegative in a few cases.

 

segments. The surface is dry and may show central healing and slight atrophy. Loss of hair, and anhidrosis may be present. Definite sensory loss or anesthesia is demonstrable. Bacteriologic smears are negative, and the Mitsuda reaction is positive.

 

or brownish in color, with a surface that is usually smooth and shiny, but may sometimes be dry and rough with scales. Peripheral margins may be fairly well-defined or may fade imperceptibly into the surrounding normal skin.

 

and may be scaly. Peripheral and cutaneous nerves may be palpably thickened. Bacteriologic smears may show slight positivity; Mitsuda reaction, weak to strong positive.

 

into the normal surrounding skin. Sensory deficit is not very definite except in central immune area or areas, when these are present. Bacteriologic smears are usually positive; Mitsuda reaction is usually negative but could be weakly positive.

 

 

 

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