Feeding bites
Feeding bites have characteristic patterns and symptoms, a function of the feeding habits of the offending pest and the chemistry of its saliva. Microscopic appearance
The histomorphologic appearance of insect bites is usually characterized by a wedge-shaped superficial dermal perivascular infiltrate consisting of abundant lymphocytes and scattered eosinophils. This appearance is non-specific, i.e. it may be seen in a number of conditions including:
Drug reactions,
Urticarial reactions,
Prevesicular early stage of bullous pemphigoid, and
HIV related dermatoses. See also
List of biting or stinging arthropods
Spider bite
Insect bite relief stick
Schmidt sting pain index
Bee  sting
Allergy

References
External links

Venomous Arthropods chapter in United States Environmental Protection Agency and University of Florida/Institute of Food and Agricultural Sciences National Public Health Pesticide Applicator Training Manual
Burns, Boyd (Bo) D (2020-12-06). "Insect Bites: Background, Pathophysiology, Epidemiology". Medscape Reference. Retrieved 2021-01-22.
Thymus hyperplasia refers to an enlargement ("hyperplasia") of the thymus.It is not always a disease state. The size of the thymus usually peaks during adolescence and atrophies in the following decades. Before the immune function of the thymus was well understood, the enlargement was sometimes seen as a cause for alarm, and justification for surgical reduction. This approach is much less common today. It can be associated with myasthenia gravis. Magnetic Resonance Imaging can be used to distinguish it from thymoma. Thymic hyperplasia
Thymic hyperplasia can be divided into three groups namely, those without any pre-existing medical condition, those recovering from a pre-existing medical condition such as pneumonia, corticosteroid therapy, radiation therapy, chemotherapy, surgery, and burns, and those with other disorders such as  hyperthyroidism, sarcoidosis, or pure red cell aplasia. References


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