Light and transmission electron microscopic studies of thymic myoid cells in Nandanam Chicken was done in various age groups ranging from day-old to forty weeks. Thymus is the central lymphoid organ in fowl, provides a complex environment essential for T-cell development and maturation. The thymic gland in chicken was covered by a thin connective tissue capsule. The connective tissue septa divi...

Hamartoma is a local malformation resulting from faulty development in an organ. It was first described breast 1971 by Arrigoni et al and its occurrence very rare. This tumor composed of lobules admixed with fibrous tissue fibroadipose tissue. Myoid hamartoma, also called as muscular hamartoma , smooth muscle cells addition to ducts, lobules, stroma. Here, we report case myoid which occurred 53...

Myoid hamartomas of the breast are extremely rare breast lesions, with a poorly understood pathogenesis. A 60-year-old woman presented with a palpable mass in the right breast. Breast ultrasonography and mammography showed the presence of a breast lesion with benign characters, but were not diagnostic. A local excision of the mass was performed; histology revealed that the tumor was composed of...

The expression of activin type II and IIB receptors and inhibin alpha-, beta A-, and beta B-subunit messenger RNAs (mRNAs), and the secretion of immunoreactive and bioactive activin during culture of testicular peritubular myoid cells and peritubular myoid cell lines were studied. Cultured peritubular myoid cells and cell lines expressed high levels of inhibin beta A-subunit mRNA and some inhib...

Retinal cone photoreceptors are polarized cells with discrete functional compartments. Little is known of the membrane-skeleton components in cones responsible for the maintenance of cellular morphology and compartmentalization of integral membrane proteins. The authors describe a high density of the membrane-skeleton protein 4.1 in the myoid region of cones in retinas of developing and adult f...

Left-right (LR) asymmetry is essential for organ development and function in metazoans, but how initial LR cue is relayed to tissues still remains unclear. Here, we propose a mechanism by which the Drosophila LR determinant Myosin ID (MyoID) transfers LR information to neighboring cells through the planar cell polarity (PCP) atypical cadherin Dachsous (Ds). Molecular interaction between MyoID a...

To the Editor: Myoid hamartoma (MH) is an extremely rare subtype of breast hamartoma characterized by the presence of myoid cell bundles in the stroma. Only approximately 30 cases have been reported to date. So its biological behavior, clinicopathologic features and histological origin are not well characterized. Moreover, its potential recurrence is usually overlooked. To the best of our knowl...

Agents which elevate cyclic AMP (cAMP) cause teleost retinal rods to contract. We have characterized this cAMP effect and have evaluated the role of the cytoskeleton in cyclic nucleotide-induced contraction, using actin and microtubule inhibitors. The necklike myoid region of the rod contracts in the dark and elongates in the light. If long, light-adapted rods are cultured with cAMP analogs and...

Teleost retinal rods elongate when exposed to light. Elongation is mediated by a narrow necklike region called the myoid. In the cichlid Sarotherodon mossambicus, the rod inner segment (composed of the myoid with adjacent ellipsoid) increases in length from 12 micrometers in the dark to 41 micrometers in the light. Long light-adapted myoids contain longitudinally oriented microtubules and bundl...