Several aspects of genotype-environment interaction may act to modulate natural selection in populations that encounter variable environments. In this study the norms of reaction (phenotypic responses) of 20 cloned genotypes from two natural populations of the annual plant Polygonum persicaria were determined over a broad range of controlled light environments (8%-100% full sun). These data rev...

Adams-Oliver syndrome (AOS) is characterized by the combination of congenital scalp defects (aplasia cutis congenita) and terminal transverse limb defects of variable severity. It is believed that Adams-Oliver syndrome without major organ abnormalities does not necessarily alter the normal lifespan. We present a case without detectable major organ abnormality contrary to life but with poor weig...

The usual clinical presentations of leukemia cutis include solitary infiltrated erythematous or violaceous plaques or nodules and multiple localized or generalized papules. On the other hand, cutaneous hyperpigmentation is a frequent finding in patients with malignancies, most of the cases because of chemotherapy or other drugs that the patient is taking. We present a case of cutaneous hyperpig...

© 2010 The Authors. doi: 10.2340/00015555-0858 Journal Compilation © 2010 Acta Dermato-Venereologica. ISSN 0001-5555 Many dermatoses exhibit lesions distributed in a linear fashion: the linearity may be related to anatomical structures (blood or lymph vessels, or nerves), to mechanical factors (urticarial dermographism, striae distensae cutis, or frictional melanosis) or to some other provocati...

Cutaneous tuberculosis can present as either primary or secondary infection, or it can be associated with systemic tuberculosis. It can present with unusual clinical and histological features causing delay in diagnosis and treatment. Tuberculosis verrucosa cutis occurs as a single verrucous lesion over exposed areas of the body along with inflammatory borders and discharging sinus. Here, we are...

This case report describes a rare differential diagnosis of soft-tissue infection in a neonate. Fever, pain, inflammation, and acute tenderness in the limb of a neonate signify acute infection or osteomyelitis unless proved otherwise. Iatrogenic calcinosis cutis presents with similar symptoms and signs; its diagnosis may be easily confused with an infective condition by an unwary orthopaedic su...