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Reticular Dermis01:15

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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
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The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
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The oral cavity, or the mouth, is a complex structure in humans that plays a vital role in our day-to-day lives. Its role is not only in chewing and swallowing food; it also plays a role in speech and facial expressions.
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Here are the steps to accurately measure oral temperature using an electronic thermometer:
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Related Experiment Video

Updated: Feb 3, 2026

Isolation of Papillary and Reticular Fibroblasts from Human Skin by Fluorescence-activated Cell Sorting
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Reticular Oral Lichen Planus.

Teresa Cox1,2, Jamie Woodhead3, Brenda L Nelson4

  • 1Department of Anatomic Pathology, Naval Medical Center San Diego, San Diego, CA, USA. teresa.m.cox.mil@mail.mil.

Head and Neck Pathology
|November 4, 2018
PubMed
Summary
This summary is machine-generated.

Reticular oral lichen planus is a common oral finding, usually asymptomatic and not requiring treatment. This case highlights its typical clinical presentation and characteristic histologic features.

Keywords:
Lichenoid mucositisMucous membrane pemphigoidOral lichen planusPemphigus vulgarisReticularWickham striae

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Area of Science:

  • Oral pathology
  • Dermatology
  • Histopathology

Background:

  • Reticular oral lichen planus (OLP) is a frequent oral mucosal condition.
  • It is often discovered incidentally during routine dental examinations.
  • Symptomatic presentation and need for treatment are rare in OLP.

Observation:

  • This case features a patient with a classic clinical presentation of reticular OLP.
  • The oral examination revealed characteristic white, lacy patterns on the buccal mucosa.
  • No significant symptoms were reported by the patient.

Findings:

  • Histologic examination confirmed the diagnosis of oral lichen planus.
  • Characteristic features included hyperkeratosis, irregular acanthosis, and a band-like lymphocytic infiltrate.
  • Biopsies are seldom required due to the typical clinical appearance.

Implications:

  • Understanding the classic presentation aids in non-invasive diagnosis of reticular OLP.
  • This case reinforces the importance of recognizing typical histologic findings.
  • It emphasizes that OLP often requires no specific intervention, reducing the need for diagnostic procedures.