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

Reactive perforating collagenosis (RPC) is one of a range of essential perforating disorders. Two types have been recognized: the childhood or inherited form, and the adult or acquired form. Acquired RPC is usually associated with systemic diseases, especially diabetes mellitus, and/or renal failure. We present a case of a 47-year-old female with umbilicated skin lesions triggered by an insect bite. Histology from the lesion revealed transepidermal elimination of collagen.
Adult ; Collagen ; Diabetes Mellitus ; Female ; Humans ; Insect Bites and Stings ; Insects ; Middle Aged ; Pruritus ; Renal Insufficiency ; Skin

A 53-year-old man developed some erythematous follicular macules accompanied with tingling sensation on both shoulders. Histologic finding showed a dense lymphocytic infiltrate around the infundibular portion of the follicle, where separation of the dermoepidermal junction was seen. The insect, obtained from the skin lesion, was identified as a larva of an Ap- hid
Aphids ; Cryptococcosis* ; Humans ; Insect Bites and Stings ; Insects ; Larva ; Middle Aged ; Sensation ; Shoulder ; Skin

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

Granuloma annulare (GA) is a benign granulomatous disease. Although its etiology is not well understood, there are some reports about GA occurring after specific conditions such as sunburn, a tuberculin test, insect bites, viral diseases and trauma. Especially, in case of the auricular region which is vulnerable to trauma, it seems that GA has some relation with trauma. In 1992, Mills and Chetty proposed that repetitive minor trauma may be an important cause of auricular GA. Among the 5 cases of auricular GA that have been reported in the English literatures, 3 cases are assumed to be associated with repetitive minor trauma. Herein, we report on two cases of auricular GA that were thought to be associated with repetitive minor trauma.
Granuloma ; Granuloma Annulare ; Insect Bites and Stings ; Sunburn ; Tuberculin Test ; Virus Diseases