Malignant Degeneration of Scars.

"Marjolin's ulcer" is known as malignant degeneration of ancient burn scars, but both words can induce misdiagnosis. Malignant degeneration of scarring tissue can occur and can vary in its clinical, histological manifestations and its pre-existing skin lesions. We present several cases to substantiate our observations.

Infective Dermatitis in an Adult Patient With HTLV-1.

Infective dermatitis is a chronic exudative eczematous eruption presenting in human T-lymphotropic virus type 1 (HTLV-1)-infected people. It presents with relapsing erythematous, scaly, and crusted lesions affecting simultaneously the scalp, external ear, retroauricular area, eyelid, paranasal skin, neck axilla, and groin. Superimposed Staphylococcus and Streptococcus infection are common.

Reactivation of Chagas disease by immunosuppressive therapy in a patient with systemic lupus erythematosus: report of an exceptional case.

Chagas disease is a zoonosis caused by the protozoan Trypanosoma cruzi. It presents as a chronic evolution and produces high morbidity and mortality in countries where the disease is endemic, as in ours. The skin disease is very rare and results from the reactivation of latent disease as a result of immunosuppression, presenting with acute, atypical, and severe lesions.

[Childhood cutaneous granular cell tumor: case report].

Granular cell tumors (GCT) are benign neoplasms of distinctive differentiation when observed by light microscopy, which are characterized by the presence of cells with abundant granular eosinophilic cytoplasm. Reports in children are extremely rare. An 11-year-old male patient presented with a nodule after six months of evolution, which progressively increased in size, asymptomatic, localized on the back.

[Bloch-Sulzberger's syndrome (Incontinentia pigmenti). Contribution with a case report].

Incontinentia pigmenti (IP) is a rare genodermatosis. Skin lesions, that are present in all patients affected, evolve in stages. The first is the erythematous blistering stage, wich differential diagnosis includes a wide variety of diseases.

[Childhood leprosy: Report of a case].

Childhood leprosy is very common, especially in tropical and subtropical areas, such as Paraguay. Early symptoms can be missed in a routine examination and the diagnosis can pass unnoticed. Pediatricians and dermatologists should remember the manifestations of this disease in order to make an early diagnosis.

[Prurigo nodularis].

Prurigos are a heterogeneous group of disorders of questionable or unknown etiology characterized by subjective symptoms such as accentuated itching and an eruption of chronic or recurrent papulonodules as an objective sign. They are divided into acute and chronic; acute forms being the most frequent in childhood. We present the case of a child with nodularis prurigo, a variety of chronic prurigo, with symmetrically affected axilary regions.