Category: H

A frenum or any reinlike or whiplike structure.  

Contraction of pupils without alteration of accommodation or convergence when gazing at a bright object. It may indicate a cortical lesion.  

A graft taken from a donor of the same species as the recipient.  

A graft taken from another person or species.  

A skin graft taken from a donor of another species.  

Herpes simplex virus type 1 infection of the tongue. This may be seen in immunocompromised patients. High-dose acyclovir is an effective treatment.  

Gum overgrowth associated with an increase in the number of the gingival component cells, usually in response to inflammation. Its causes include dental plaque, local irritants, long-term use of phenytoin, nifedipine, or cyclosporine, puberty, use of hormonal contraceptives, and leukemia, among others.  

The rudimentary structure from which a hair develops. It consists of an ingrowth of epidermal cells called hair peg, which pushes into the corium.  

A gene expressed in nearly every cell and every tissue of an organism, i.e., one that encodes a protein fundamental to cellular activity throughout the organism.  

Any transcription factor that regulates the growth, differentiation, replication, and movement of cells in the body. These genes influence both normal and abnormal embyological development and the development or suppression of malignant tumors.