Petechiae

Japanese: 溢血点 - いっけつてん（英語表記）petechiae

Small bleeding the size of an azuki bean or smaller occurs due to the rupture of capillaries. Larger bleeding is called an ecchymosis. It is considered an important symptom in diagnosing death by asphyxiation. It is thought to be caused by increased intracapillary pressure, increased permeability of the capillary wall due to hypoxic or anoxic conditions, and spasms of the capillary wall, and can appear in the palpebral conjunctiva, bulbar conjunctiva, oral mucosa, pharyngeal mucosa, pulmonary pleura, thymic capsule, pericardium, epicardium, and renal pelvic mucosa. Extravasation spots on the pulmonary pleura seen in cases of death by asphyxiation are called Tarjoux spots.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

毛細血管の破綻（はたん）によって生じるアズキ大以下の小出血。それより大きいものは溢血斑という。窒息死の診断上，重要な症状とされる。毛細血管内圧の上昇，低酸素あるいは無酸素状態による毛細血管壁の透過性の亢進，毛細血管壁の痙攣（けいれん）などが成因と考えられ，出現部位は眼瞼結膜，眼球結膜，口腔粘膜，咽喉部の粘膜，肺胸膜，胸腺被膜，心膜，心外膜，腎盂（じんう）粘膜など。窒息死にみられる肺胸膜の溢血点はタルジュー斑点といわれる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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