1. Tuberculoid (TT) Leprosy
Jaison A. Barreto
ILSL, Bauru, S. Paulo, Brazil
leprosy mailing list - November 2011

2. leprosy mailing list - November 2011
Tuberculoid (TT) leprosy: single lesion with central healing and a well-defined, raised and erythematous rim. There is total loss of sensitivity (thermal, pain and tactile), which usually persists after treatment.
leprosy mailing list - November 2011
Courtesy of: Jaison A. Barreto

3. TT leprosy: racket lesions
Dorsum of the hand: atrophic skin plaque distributed over the area served mostly by the ulnar cutaneous nerve.
Dorsum of the foot: enlarged cutaneous nerve (fibularis superficialis) arising from a plaque.
leprosy mailing list - November 2011
Courtesy of: Jaison A. Barreto

4. leprosy mailing list - November 2011
TT Leprosy (tuberculoid nodular of childhood): note the two painless central points of perforation with fine needle. His grandfather had lepromatous leprosy.
Courtesy of: Jaison A. Barreto
leprosy mailing list - November 2011

5. leprosy mailing list - November 2011
Pure neural tuberculoid leprosy: abscess (a) and thickening (b) of n. fibularis superficialis. Skin biopsy and skin smears negative. No visible cutaneous lesions. a b
leprosy mailing list - November 2011
Courtesy of: Jaison A. Barreto

6. leprosy mailing list - November 2011
Pure neural tuberculoid leprosy: fistulized abscesses of the sural nerve.
Courtesy of: Jaison A. Barreto
leprosy mailing list - November 2011

7. leprosy mailing list - November 2011
dnb Sc
TT leprosy: cord-like tuberculoid granuloma (a), aggression to epidermis (b), partial destruction of Schwann cells (Sc), or almost total destruction of dermal nerve branch (dnb), no bacilli inside granuloma in Faraco-Fite stain.
leprosy mailing list - November 2011
Courtesy of: Jaison A. Barreto

8. leprosy mailing list - November 2011
TT Leprosy: caseation necrosis of a dermal nerve branch. In this case, deep mycosis or cutaneous tuberculosis must be ruled out, as well as non infectious palisading granulomas. Immunohistochemical assays for S-100 protein can be helpful.
leprosy mailing list - November 2011
Courtesy of: Jaison A. Barreto