1. The thymus gland of young rats autotransplants easily when inserted in the muscles of the abdominal wall. 2. Destructive changes take place during the first 48 hours, when regenerative changes set in. 3. The regeneration is usually complete by the 14th day, when the new formed thymic lobules show differentiation into cortical and medullary zones. 4. The small thymic cells arise from the reti...

Ventilation The four main processes involved in gas exchange in the lungs include ventilation (the movement of air in and out of the lungs), distribution (the partitioning of the ventilated gases into the various lobes, segments and lobules), diffusion (the movement of gases back and forth between the alveoli and the plasma and red blood cells), and perfusion (the circulation of blood through t...

There is currently much speculation over the precise nature of lobular carcinoma in-situ of the breast and its significance. Histochemical study shows that it is rich in sialomucin. This has a characteristic intracellular distribution which distinghishes lobular carcinoma in-situ from cancerization of lobules. The same histochemical features are seen in the infiltrative phase of the tumour. The...

This report describes meibomian adenoma (MA) and moll gland adenoma in a female, 1.5-monthsold, crossbreed calf. Macroscopically, the mass was 3 × 1.5 × 0.5 cm in size and 5.35 g in weight; its shape was gray-reddish and it was localized on the right lower eyelid. Microscopically, the mass was composed of lobules of various sizes separated with a septum, which included well-differentiated sebac...

In both the initial biopsy and the complete excision of the lesion, specimens were obtained for hematoxylin-eosin staining. Both specimens showed a well-defined, unencapsulated cystic tumor formed by several different-sized lobules composed of an external layer of basaloid cells and several layers of eosinophilic spindle cells with abrupt keratinization (Fig. 2). No atypia or mitotic figures we...

In both the initial biopsy and the complete excision of the lesion, specimens were obtained for hematoxylin-eosin staining. Both specimens showed a well-defined, unencapsulated cystic tumor formed by several different-sized lobules composed of an external layer of basaloid cells and several layers of eosinophilic spindle cells with abrupt keratinization (Fig. 2). No atypia or mitotic figures we...

Localized involutional lipoatrophy (LIL) is a rare distinctive idiopathic form of localized lipoatrophy. The characteristic histopathologic feature of LIL are diminutive fat lobules composed of small adipocyte resembling fetal fat tissue. LIL is not a well-known disorder, there have been only a few reports on LIL in the English literature.We report a case of localised involutional lipoatrophy i...

FIG. 1. LIVER OF RABBIT 9-96 (HAIR BROWN) SHOWING A PORTAL TRACT SURROUNDED BY SEVERAL LAYERS OF HEALTHY LIVER CELLS On either side the centers of the lobules are completely necrotic. The animal received 5 mg. dibenzanthracene per 100 gm. body weight, over a period of seventeen months. Death occurred seventeen days after the last injection, with hobnail liver, edema, and ascites. Methylene blue...

A 28-year-old man with long-standing right proptosis presented with an extensive multilobulated partially cystic orbital mass thought to be a lymphangioma. Because of concern that excision or debulking of the lesion was likely to be complicated by excessive bleeding, the lesion was injected with a mixture of ethiodized oil (Ethiodol) and cyanoacrylate glue under direct observation. The mixture ...