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Related Concept Videos

Accessory Structures of the Skin: Sebaceous Glands01:21

Accessory Structures of the Skin: Sebaceous Glands

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A sebaceous gland is a type of oil gland found almost all over the skin ( except palms and soles) and helps lubricate and waterproof the skin and hair. Most sebaceous glands are associated with hair follicles. They generate and excrete sebum, a mixture of lipids, onto the skin surface, thereby naturally lubricating the dry and dead layer of keratinized cells of the stratum corneum, keeping it pliable.
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Requirements for Human Life01:26

Requirements for Human Life

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The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
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Proteins: Dietary Sources and Requirements01:28

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Consuming animal-based products offers high-quality proteins that contain optimal levels and combinations of essential amino acids, crucial for tissue repair and growth. Foods like eggs, milk, fish, and most meats are a source of complete proteins. Legumes and cereals are abundant in proteins; however, they typically lack a full range of essential amino acids. As a result, they are considered incomplete protein sources. Some plant sources like soybeans, quinoa, and amaranth do contain complete...
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Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
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Carbohydrates: Dietary Sources and Requirements01:15

Carbohydrates: Dietary Sources and Requirements

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Carbohydrates are predominantly obtained from plant sources. With the exception of lactose found in milk and insignificant glycogen amounts in meat, most consumed carbohydrates have plant origins. Monosaccharides and disaccharides, or sugars, can be sourced from fruits, honey, milk, sugar cane, and sugar beets. Grains and vegetables are rich in the polysaccharide starch. Two types of polysaccharides provide fiber: cellulose, which is abundant in many vegetables, forms undigestible roughage or...
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Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

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Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ...
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Related Experiment Video

Updated: Jan 31, 2026

Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats
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Sebaceous lymphadenoma requiring superficial parotidectomy.

Luona Sun1, Roger Chen Zhu1, Jiankun Tong2

  • 1Department of Surgery, New York Presbyterian Queens, Flushing, New York, USA.

BMJ Case Reports
|December 21, 2018
PubMed
Summary

A rare sebaceous lymphadenoma presented as a neck mass in an 82-year-old woman. Surgical removal of the parotid tumor and lymph nodes resulted in a disease-free outcome.

Keywords:
head and neck surgerypathologyradiology

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Area of Science:

  • Oncology
  • Head and Neck Surgery
  • Pathology

Background:

  • Sebaceous lymphadenoma is a rare benign salivary gland tumor.
  • Neck masses can present diagnostic challenges, requiring thorough investigation.

Observation:

  • An 82-year-old woman presented with a 2-year history of a painless, enlarging right neck mass.
  • Imaging revealed a 5.0 cm cluster of nodes inferior to the right parotid gland.

Findings:

  • Fine-needle aspiration suggested a lymphoproliferative disorder.
  • Incisional biopsy confirmed the diagnosis of sebaceous lymphadenoma.
  • Superficial parotidectomy with neck dissection (levels II-V) was performed, preserving the facial nerve.

Implications:

  • This case highlights the importance of considering rare diagnoses in neck masses.
  • Surgical management achieved a favorable outcome with no evidence of disease recurrence.
  • Accurate diagnosis and tailored surgical intervention are crucial for managing parotid gland tumors and associated lymphadenopathy.