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Related Concept Videos

Unusual Results01:16

Unusual Results

3.9K
Unusual results are those that have a very low chance of occurring. Unusual results can be identified using probabilities and the range rule of thumb. In problems involving probability, unusual results can be observed in 2 instances – an unusually high number of successes or an unusually low number of successes.
According to the range rule of thumb, any value above or below two standard deviations, 2σ  from the mean, μ  is considered unusual.
Maximum unusual value =...
3.9K
z Scores and Unusual Values01:07

z Scores and Unusual Values

11.1K
The z score is one of the three measures of relative standing. It describes the location of a value in a dataset relative to the mean. z scores are obtained after the standardization of the values in a dataset. The z score for the mean is 0.
 This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data...
11.1K
Data Reporting and Recording01:24

Data Reporting and Recording

5.5K
Reporting and recording are crucial in data documentation. The timely, thorough, and accurate documentation of facts is essential when recording patient data. Failure to record findings during an assessment or interpretation of a problem will result in loss of information and make the patient document unreliable. The reader is left with general impressions if the information is not specific. A recording is documenting data of the individual's health information in a traceable, secure, and...
5.5K
Types of Reports I: Hands-off Report01:25

Types of Reports I: Hands-off Report

1.5K
A hand-off report, also known as a change-of-shift report, is a crucial nursing process that ensures the smooth transition of patient care responsibilities between nursing staff.
Following are the key components and categories of hand-off reports:
Purpose and Process:
1.5K
Types of Reports II: Incident or Occurrence Report01:21

Types of Reports II: Incident or Occurrence Report

1.3K
An Incident or Occurrence Report in a healthcare setting is a crucial document used to record any unexpected occurrence that may or may not have affected a patient, employee, or visitor. Such reports are critical to improving patient safety and include all details leading up to and including the event.
Purposes:
In the healthcare industry, reports play a crucial role in documenting incidents within an agency. The primary objective of these reports is to ensure patient safety, uphold the...
1.3K
COPD: Pathogenesis and Clinical Features01:20

COPD: Pathogenesis and Clinical Features

1.9K
Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
1.9K

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Related Experiment Video

Updated: Feb 10, 2026

Generation of Cancer Cell Clones to Visualize Telomeric Repeat-containing RNA TERRA Expressed from a Single Telomere in Living Cells
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Terra Firma-Forme Dermatosis Presenting With Unusual Features: A Case Report.

Meshari A Alalyani1, Khuzama M Alaseeri1, Shaden O Alqurashi2

  • 1College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah, SAU.

Cureus
|February 9, 2026
PubMed
Summary
This summary is machine-generated.

Terra firma-forme dermatosis (TFFD) causes dirt-like skin patches resistant to washing. A simple alcohol wipe test effectively diagnosed TFFD in a patient, revealing characteristic hyperkeratosis.

Area of Science:

  • Dermatology
  • Cutaneous Disorders
  • Histopathology

Background:

  • Terra firma-forme dermatosis (TFFD), or retention hyperkeratosis, presents as brown, dirt-like patches resistant to hygiene.
Keywords:
asymptomatic verrucous plaquebenign cutaneous disorderlamellar hyperkeratosisretention hyperkeratosisterra firma-forme dermatosis

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  • Pathophysiology involves delayed keratinocyte maturation and stratum corneum retention of melanin and sebum.
  • Differential diagnoses are broad, including dermatitis neglecta and epidermal nevi.