Eccrine angiomatous hamartoma

This is the case of a 13 year-old female evaluated for a congenital skin lesion on the left buttock. Physical examination revealed a well-defined light brown patch with a 4mm papule on the center. A skin biopsy revealed an increased number of eccrine glands associated to a proliferation of vascular channels, particularly capillaries. These findings are consistent with a diagnosis of eccrine angiomatous hamartoma

Exogenous ochronosis

La ocronosis exógena es una condición que se caracteriza por tener hiperpigmentación de la cara secundario al uso crónico de cremas blanqueadores que contienen hidroquinona. Histopatológicamente se ve una colección de glóbulos amarillo-marrón (ocronóticos) en la dermis papilar. Se reportan dos casos de ocronosis exógena y se hace un repaso de la literatura

Cutaneous drug reactions

Cutaneous drug reactions are among the most common causes of skin eruptions in hospitalized patients. In outpatient clinics, drug eruptions represent a diagnostic and therapeutic challenge to the physician as any drug can cause an adverse cutaneous reactions. These reactions may be mediated by immunologic or nonimmunologic mechanisms. Cutaneous drug reactions may manifest themselves in various clinical morphologic patterns. Factors such as sun-exposure, concomitant drugs or diseases and host immune status can influence the type and morphology of lesions. History taking is one of the most important aspects in the evaluation of these patients and must be oriented so as to provide the information that will lead to the final diagnosis

Clinicopathologic study on pityriasis alba

Pityriasis alba (PA) is a relatively common skin disorder usually seen in children and young adults characterized by the presence of superficial hypopigmented macules. A clinicopathologic study on pityriasis alba was undertaken which showed an increased ocurrence of the disease in preadolescent children with