Related Experiment Video
Updated: Jun 25, 2026
09:12
The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
70.9K
Regular resident becomes aggressive enemy: Diagnosed on cytology.
Anvitha Lakshminarayan Joshi1, Immanuel Pradeep1, Jitendra Singh Nigam1
1Department of Pathology and Lab Medicine, All India Institute of Medical Sciences, Bibinagar, Telangana, India.
Summary
Actinomycosis, a common oral bacterium, rarely affects bone. This case highlights a cervicofacial infection in an immunocompetent individual, diagnosed via fine needle aspiration cytology.
Area of Science:
- Microbiology
- Oral Medicine
- Infectious Diseases
Background:
- Actinomycosis is an infection caused by oral commensals.
- It typically affects patients with immunosuppression and mucosal injuries.
- Bone involvement is an uncommon presentation.
Observation:
- A 39-year-old immunocompetent male presented with left perimandibular swelling.
- The swelling was soft to firm and tender.
- Initial diagnosis was pursued via fine needle aspiration cytology.
Findings:
- Fine needle aspiration cytology (FNAC) and cell block preparation confirmed Actinomycosis infection.
- The case presented as a soft tissue infection rather than direct bone involvement.
Implications:
- This case expands the understanding of Actinomycosis presentations in immunocompetent individuals.
- Highlights the importance of considering Actinomycosis in cervicofacial infections, even without typical risk factors.
- Emphasizes the diagnostic utility of FNAC and cell block preparation for soft tissue infections.
Related Concept Videos
01:27Cytotoxic T Cells-mediated Immune Response
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
01:24Cellular Adaptation IV: Dysplasia and Metaplasia
DysplasiaDysplasia refers to abnormal changes in the size, shape, and organization of mature cells, characterized by pleomorphism, nuclear abnormalities, and increased mitotic activity. It commonly affects epithelial tissues, including the cervix, gastrointestinal tract, respiratory mucosa, and endometrium. Although it may occur alongside hyperplasia, dysplasia is not a true adaptive response but a preneoplastic change with potential to progress to cancer.When confined above the basement...