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Image Number 599 (PPD reaction)


Diagnosis: PPD reaction

Site: Arm,forearm

Sex: M

Age: 49

Type: Clinical and Histology

Description: Punch bx yielding perivascular and periadnexial mononuclear cells

Submitted by: Nasuhi Engin Aydin

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Differential Diagnosis

History: Dermal induration of tuberculin (Mantoux test) positivity 48 hours after PPD injection. Punch biopsy revealing a dominance of CD3 T lymphocytes see reference: Journal of Tropical Pediatrics, Vol. 50, No. 4, p.248-9 Immunohistochemistry of Tuberculin Skin Test.

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