Case report: Sclerosed hemangioma of the liver: A diagnostic challenge.

Hemangiomas are the most common noncystic benign hepatic tumors and are usually incidentally discovered during routine radiological examinations. The diagnosis of hepatic hemangiomas with a typical presentation is generally easy with plain and cross-sectional imaging; however, it can be complicated when hemangiomas undergo histological changes such as fibrosis. Sclerosed hepatic hemangioma (SHH) is the extreme presentation of this fibrotic process. These atypical lesions can be misdiagnosed as primary hepatic malignancies or metastasis. Their diagnosis is established by histological examination. We report the case of a patient with an SHH, which was misdiagnosed as an intrahepatic cholangiocarcinoma. This article's aim is to draw attention to this infrequent pathology and underline the features of this benign tumor that could suggest its diagnosis prior to surgery to avoid unnecessary hepatic resections.

Drosophila C virus: experimental study of infectious yields and underlying pathology in Drosophila melanogaster laboratory populations.

The underlying pathology of a nonhereditary virus, the Drosophila C virus, was studied. This study was related to the contamination routes (ingestion or contact) and developmental timing. When oral contamination occurred at the first larval instar: (1) the flies were contaminated, (2) the flies which had developed the most rapidly were the most infected, (3) in newly emerged females, the level of virus was higher than in newly emerged males, (4) when infected flies were reared on virus-free medium only males lost their virus. Moreover, oral contamination of adults was very efficient, but the highest virus yield was obtained when both larvae and imagos grew on virus-contaminated medium. About 30 to 50% of the flies died on the sixth day. They were as DCVC invaded as DCVC-injected flies. It seemed that when the virus yield was higher than a given threshold, all flies died, whatever had been the contamination routes. When contaminated adult females and virus-free males were reared together on a virus-free medium, females could infect males. In contrast, contaminated males were not able to infect virus-free females. Thus, only females were able to contaminate a rearing medium or other flies.

[Activity of the corpora allata of diapausing females of Tetrix undulata (SWRB) (Orthoptera-Tetrigidae)]. / Activité des corps allates de femelles en diapause chez Tetrix undulata (SWRB) (Orthoptère-Tetrigidae)

The implantation of one or two pairs of corpora allata of diapausing females in another diapausing females (two weeks old) induces vitellogenesis and laying of one, two or three egg-pods in a great number of females. The denervation of the corpora-allata of a diapausing female also induced vitellogenesis. These results suggeste that corpora-allata of diapausing females are not active. The denervation induces the break of the inhibition "travelling" by the corpora-allata-cardiaca nerves or stimulates the corpora-allata.

[Maturation of the female Tetrix undulata (Swrb) (Orthoptera, Tetrigidae): influence of the male and copulation:parthenogenetic egg-laying]. / Maturation des femelles de Tetrix undulata (Sweb) (orthoptère tetrigidae): influence du mâle et de l'accouplement: ponte parthénogénétique

The percentage of laying females and laying time, are compared between mature females (diapause break by chilling) and diapause strain females (diapause not broken by chilling) reared with mature male or diapause male or without male. For the same physiological state of the females (mature or diapause) there is no difference in the percentage of females laying, when they are reared with mature male or with diapause one or none; but the laying time is shortest with mature male, longer with male in diapause, even longer without male. Parthenogenetic egg-pods can be obtain. Rearing with mature males does not break the reproductive diapause of females. In parthenogenetic egg-pods the number of eggs is short for low diapause females; greater for mature ones and greatest for females with strong diapause broken by a corpus allatum implant of mature female of Locusta migratoria. Corpus allatum of the low diapause strain of females of Tetrix undulata have less activity than that of mature females. Few parthenogenetic eggs develop, even less hatch. In Tetrix undulata parthenogenesis is accidental.

[Allatecotomy and imaginal diapause in female Tetrix undulata (Sow.) (Orthoptera, (Tetrigidae)]. / Allatectomie et diapause imaginale chez les femelles de Tetrix undulata (Sow.) (Orthoptère, Tetrigidae)

Allatectomised females (whose diapause has been broken by chilling) do not lay though sham-operated or unoperated or unoperated controls do lay: corpora allata are essential for maturation. Ovocyte size is the same for allatectomized females as for diapause females. So it seems that the lack of ovocyte development might be the result of the inactivity or inhibition of corporal allata.

[Termination of imaginal diapause of female Tetrix undulate (Sow.) (Orthoptera, Tetrigidae) by implantation of the corpora allata of an active female Locusta migratoria]. / Rupture de la diapause imaginale des femelles de Tetrix undulata (Sow.) (Orthoptère, Tetrigidae) par implantation d'un corps allate de de femelle active de Locusta migratoria

The effect of implanted active corpora allata on the reproductive diapause in adult females of grasshopper, Tetrix undulata (Sow.) was investigated. Implantation of one corpus allatum originating from sexually mature, adult female Locusta migratoria donors effectively terminated reproductive diapause by inducing oocyte development and egg-laying. The diapause-break is the same in females reared at 8, 12, 16 hours light at 30 degrees or 25-20 degrees. There is no difference between females reared with male or without male.