Yellow color upon dermatoscopy does not exclude melanoma!

Yellow color upon dermatoscopy does not exclude melanoma!

Editorial/Commentary DPC | Dermatol Pract Concept 2013;4(2):10 51 In this issue, Rosendahl and colleagues report a case of non-choroidal melanoma that shows a strikingly unusual dermatoscopic aspect, namely, structureless yellow color. The authors correlate the yellow color to the presence of lipofuscin using tissue staining with Sudan Black. Upon dermatoscopy, colors are important because they...

One negative polysomnogram does not exclude obstructive sleep apnea.

Night-to-night variability of apneas on overnight polymnography exists in patients with documented obstructive sleep apnea (OSA). In this study, we evaluated the possibility that this variability may be severe enough to miss the diagnosis of OSA in patients clinically at risk for the disease. We prospectively studied 11 patients who were deemed on clinical grounds to have probable OSA, but had ...

Does Vagueness Exclude Knowledge?

On two standard views of vagueness, vagueness as to whether Harry is bald entails that nobody knows whether Harry is bald—either because vagueness is a type of missing truth, and so there is nothing to know, or because vagueness is a type of ignorance, and so even though there is a truth of the matter, nobody can know what that truth is. Vagueness as to whether Harry is bald does entail that no...

Enteroviral meningitis does not exclude concurrent bacterial meningitis.

We read with interest the study of Nolte et al. (6) evaluating a completely automated enteroviral real-time PCR assay (EVPCR) with cerebrospinal fluid (CSF). Among 434 patients, 113 (26%) had enteroviral meningitis with no bacterial coinfection. Six patients had bacterial meningitis with EV-PCR-negative CSF. In accordance with the work of Nigrovic et al. (5), who found no bacterial coinfection ...

Does Luck Exclude Control?