Ziwa la Venous (Venous lake) kwa ujumla ni papuli laini, inayoweza kubana, yenye giza lililokolea, yenye urefu wa 0.2 hadi 1 cm, inayopatikana kwa kawaida kwenye sehemu za mpaka wa vermilion wa mdomo. Vidonda hivi hutokea zaidi kwa wazee. Ingawa vidonda hivi vinaweza kufanana na melanoma ya nodular, kidonda cha ziwa la Venous (Venous lake) ni laini.
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A venous lake is a generally solitary, soft, compressible, dark blue to violaceous, 0.2- to 1-cm papule commonly found on sun-exposed surfaces of the vermilion border of the lip, face and ears.
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Venous lake ni senile hemangioma ya midomo. Kwa kawaida ni uvimbe laini, wa buluu unaosababishwa na mishipa midogo iliyopanuka. Huonekana peke yake na hajisikii vibaya kuigusa. Mara nyingi hutokea kwenye sehemu za uso na masikio ambazo hupata jua nyingi. Mwanamume mwenye umri wa miaka 46 alikuja akiwa na uvimbe wa kibluu kwenye mdomo wake wa chini ambao ulikuwa umekua kwa miezi 8. Ulianza ndogo kisha ukawa mkubwa baada ya muda. Alisema hakuwa amejeruhiwa eneo hilo. Hakuwa na uzoefu wa kupata damu bila sababu au baada ya majeraha madogo. Daktari alipomchunguza, aligundua nundu moja ya rangi ya samawati kwenye mdomo wake wa chini ambayo ilikuwa laini na rahisi kubana. Daktari alimtendea cryotherapy kwa kutumia nitrojeni kioevu, akifunga kidonda kwa sekunde 10 kila wakati na ukingo mdogo karibu nayo. Walifanya matibabu haya kila baada ya wiki mbili. Baada ya wiki 12, kulikuwa na uboreshaji. A venous lake, sometimes referred to as senile hemangioma of the lips is usually a solitary, non-indurated, soft, compressible, blue papule occurring due to dilatation of venules. It is commonly found on sun-exposed surfaces of the face and ears. A 46 year old male patient presented with an 8 month history of a single, painless, bluish swelling over the lower lip which began as a pea sized lesion and gradually increased to the present size. Patient strongly denied any history of trauma at the site. No history of bleeding spontaneously or following minimal trauma could be elicited. On physical examination, a single, violaceous, soft, compressible, non-indurated, non-pulsatile papule was present on the lower lip. Patient was treated with cryotherapy with application of liquid nitrogen by dipstick method with one 10-second freeze-thaw cycle with a 1-mm margin. This was done at biweekly intervals. Some improvement was obtained following 12 weeks of therapy.
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