No abstract available.
Insect Bites and Stings*

Most insects have a stinging apparatus at the tail end of their abdominal segment and can deliver venom. The venom can usually result in pain, erythema, abscess, or allergic reaction in human tissues such as the skin and even the lips. The presentation of lip abscess, especially in the vermilion, is rare and needs to be appropriately managed. A 39-year-old prediabetic male presented with a swollen right lower lip stung by an insect six days before the consult. The swelling started as a vesicle which became bigger, then burst, exuding a yellowish fluid and blood. The swollen area became more significant, and pain was felt. The clinical presentation was that of a lower lip abscess. Adequate antibiotics were prescribed along with a corticosteroid and a topical antiseptic. The treatment was essential to prevent the dissemination of infection and the likelihood of tissue necrosis. This case report is presented as a rare clinical case of a lower lip abscess due to an insect sting with spontaneous drainage after treatment in a prediabetic male. The dentist and clinician needed to identify this condition and to manage the case properly.
Insect Bites and Stings

Reactions to Hymenoptera insect stings are common. While most are self-limited, some induce systemic allergic reactions or anaphylaxis. Prompt recognition, diagnosis, and treatment of these reactions are important for improving quality-of-life and reducing the risk of future sting reactions. This review summarizes the current recommendations to diagnose and treat Hymenoptera sting induced allergic reactions and highlights considerations for various populations throughout the world.
Anaphylaxis ; Bites and Stings ; Hymenoptera ; Hypersensitivity ; Insect Bites and Stings ; Insects

Acquired perforating collagenosis (APC) is a rare dermatological condition characterized by the spontaneous eruption of skin-colored or erythematous papules or nodules that eventually ulcerate and exude collagenous material. The exact etiology of APC remains unclear, although various triggers, including infections, medications, autoimmune diseases, and trauma, have been implicated.

This case report presents a 63-year-old female with a history of diabetes who developed erythematous papules and plaques topped with thick, yellowish, hyperkeratotic, adherent crusts on the upper back following an insect bite. Histopathological examination confirmed the diagnosis of APC, characterized by a cup-shaped invagination in the epidermis containing degenerated collagen bundles and basophilic material. Masson-trichrome staining showed transepidermal elimination of the collagen fibers. Patient was initially prescribed tretinoin 0.1% cream to be applied 2x a day. However, patient was not able to apply prescribed medications. Interestingly, without any specific treatment, the patient’s symptoms gradually improved over 3 months and eventually resolved completely.

This case report highlights the spontaneous resolution of APC in a patient following an insect bite. While most cases of APC require medical intervention, this case demonstrates the potential for spontaneous healing in certain individuals. Further research is needed to understand the factors that influence the course of APC and to identify potential predictors of spontaneous resolution.

Child ; Female ; Humans ; Hydroa Vacciniforme ; Hypersensitivity ; Insect Bites and Stings

Ants(Family Formicidae) are very successful organisms occuring in trernendous numbers worldwide in terrestrial habitats. All ant species may bite, and on species sting. 48 species in 26 genus have been reported in Korea, but only systemic reaction induced by the anti Brachyponera chinersis, has been reported in the Korea terature. A 48 year old man was stung on the neck, abdomen, and dorsum of the hand by flying stinging ants. He experienced moderate pain, burning and itching sensation. Clinical course and histopathologic findings of the lesions caused by the stinging ant was observed without specific treatment. The stinging ants collected from t,he patient.s skin and his house were identified as Euponera chosensis belonging to Subfamily Ponerinae. To the best of our know ledge, this is the first clinical repor of the insect sting by Euponera chosensis in the Korean literature.
Abdomen ; Ants ; Bites and Stings ; Burns ; Diptera ; Ecosystem ; Hand ; Humans ; Insect Bites and Stings* ; Insects* ; Korea ; Middle Aged ; Neck ; Pruritus ; Sensation ; Skin

Eruptive pseudoangiomatosis is a rare, benign, self-limiting exanthem, which is known to occur primarily in children but rarely in adults. It is characterized by the sudden onset of a few to numerous bright red angioma-like papules, which are caused by dilatation of dermal blood vessels and are surrounded by a pale halo. A viral etiology and a possible association with insect bite and immunosuppression have been suggested. We report a case of eruptive pseudoangiomatosis in a middle-aged woman.
Adult ; Blood Vessels ; Child ; Dilatation ; Exanthema ; Female ; Humans ; Immunosuppression ; Insect Bites and Stings

A healthy 30-yr-old woman carrying an insect that had been caught in her living room visited the International Clinic at Severance Hospital, Seoul, in December 2007. The insect she brought was identified to be a nymph of a bedbug, Cimex lectularius, and her skin rashes looked typical bedbug's bites. Her apartment was investigated, and a dead body of a bedbug, cast skins, and hatched eggs were found in her rooms and neighbors' rooms in the same building. She was living in that apartment in Seoul for 9 months since she had moved from New Jersey, USA. We assume that the bedbugs were introduced from abroad, since there had been no report on bedbugs in Seoul for more than 2 decades at least. This is a report of a reemergence of the common bedbug, C. lectularius in Seoul, Korea.
Adult ; Animals ; *Bedbugs/anatomy & histology ; Dermatitis/*pathology ; Female ; Humans ; Insect Bites and Stings/*pathology ; Insecticides ; Korea/epidemiology

Cutaneous pseudolymphoma refers to a heterogeneous group of benign reactive T- or B-cell lymphoproliferative diseases of the skin that resembles cutaneous lymphoma both clinically and histologically. Although most pseudolymphomas develop from unknown causes, various stimuli can induce pseudolymphomas. Pseudolymphomas have developed followed medications, infections, insect bites, ear piercing, and gold. To date, no case of pseudolymphoma developing after gold acupuncture has been reported in the Korean dermatologic literature. We report a case of a 49-year-old female who presented with multiple skin-colored papules on the left lower eyelid that showed features of a pseudolymphoma based on histopathologic assessment.
Acupuncture ; B-Lymphocytes ; Body Piercing ; Eyelids ; Female ; Humans ; Insect Bites and Stings ; Lymphoma ; Middle Aged ; Pseudolymphoma ; Skin

A 25 year old man presinted with erythematous and inderated plaques on the upper and lower extermities that were preceded by insect bites while traveling in central Africa. The patient had a past histrory of Kimura's disease, asthma, and allergic rhinitis, Histologic examination revealed panniculitls showing massive eosinophilic infiltration. The dermis showed eosinopbilic infilreatiom without flame figyres. The patient responded well to oral conrticosteroids. This patient did not fit the diagnosis of eosinoplilic pannicylitis, eosinophilic cellylitis, hypereosinophilic syndrome or eosinophilic vascylitis.
Africa, Central ; Asthma ; Dermis ; Diagnosis ; Eosinophils* ; Humans ; Hypereosinophilic Syndrome ; Insect Bites and Stings ; Rhinitis, Allergic ; Skin*