Pinta is considered primarily a disease of children and adults, and most cases are limited to the skin. Infection usually is spread by person-to-person contact in endemic areas by direct skin or mucous membrane contact.
After an incubation period of 15-30 days, the primary infection begins as one or several small papules, usually on the exposed surfaces of the extremities, which enlarge over the course of 3-9 months. Regional lymph nodes may be enlarged and painless.
During this period, the color of the lesions changes from copper to slate blue. These lesions, or "pintids," are psoriasiform plaques and are painless but pruritic. Later the lesions can become hyper and hypopigmented, thus giving pinta its name.
The late findings of pinta are limited to the skin. Regional lymphadenopathy is not uncommon. Leucoderma is the main complication, resulting in social stigma.
A67.9 – Pinta, unspecified
22064009 – Pinta
Early and mid:
- The lesions of cutaneous leishmaniasis (Old World and New World) are more inflammatory and crusted.
- A lesion associated with an arthropod bite has a more rapid onset and is more inflammatory.
- The lesions of sporotrichosis are associated with trauma and ascend the lymphatic chain.
- Yaws presentation is more papillomatous.
- Cutaneous tuberculosis lesions are usually more suppurative.
- Chromomycosis is associated with annular or arcuate lesions that are pigmented early.
- Lobomycosis presents with smooth keloidal nodules.
- The lesions of cryptococcosis are sometimes umbilicated.
- Basal cell carcinoma lesions have a pearly rolled border.
- The lesions of squamous cell carcinoma are more keratotic early.
- Atypical mycobacterial infections
- Tick granuloma
- There is no inflammation in the symmetric lesions of vitiligo.
- Tinea versicolor presents with fine scale and is potassium hydroxide (KOH)-positive.
- Discoid lupus may be differentiated from pinta through a biopsy.
- Chronic pellagra is associated with weight loss.
- The lesions of psoriasis have a thickened scale.
- Tinea corporis is KOH-positive and presents with annular lesions.
- Post-inflammatory hypopigmentation and hyperpigmentation both present with less surface change.
- Chromomycosis lesions are annular or arcuate and pigmented early.
- Lobomycosis presents with smooth nodules.
- The lesions of leprosy may take many forms and they are sometimes anesthetic.
- Visceral leishmaniasis