A subset of basal cell carcinomas (BCCs) are directly derived from hair follicles (HFs). In some respects, HFs can be defined as 'ordered' skin appendage growths, while BCCs can be regarded as 'disordered' skin appendage growths. The aim of the present study was to examine HFs and BCCs to define the expression of common and unique signaling pathways in each skin appendage. Human nodular BCCs, a...

We explored the role of b-catenin in chicken skin morphogenesis. Initially b-catenin mRNA was expressed at homogeneous evels in the epithelia over a skin appendage tract field which became transformed into a periodic pattern corresponding to ndividual primordia. The importance of periodic patterning was shown in scaleless mutants, in which b-catenin was initially expressed normally, but failed ...

Myxoma is the most common benign tumor of the heart, but it is very rare for it to originate from the left atrial appendage. Distinguishing between a mass, a thrombus, and a tumor in the body of the left atrium with preoperative transthoracic or transesophageal echocardiography is very difficult, even more so in patients with mitral valve disease and chronic atrial fibrillation. A 50-year-old m...

BACKGROUND Cardiac hemangioma is a rare cause for pericardial effusion. We present a case of hemangioendothelioma of the right atrial appendage associated with pericardial effusion in an infant. METHODS The patient was a 49-day-old infant transferred to our department because of the presence of pericardial effusion. Two-dimensional transthoracic echocardiography revealed moderate pericardial ...

Star-nosed moles have a series of mechanosensory appendages surrounding each nostril. Each appendage is covered with sensory organs (Eimer's organs) containing both rapidly adapting and slowly adapting mechanoreceptors and each appendage is represented in primary somatosensory cortex (S1) by a single cortical module. When the skin surface of an appendage is depressed, neurons in the correspondi...

Classical histological studies have demonstrated the cellular organization of skin appendages and helped us appreciate the intricate structures and function of skin appendages. At this juncture, questions can be directed to determine how these cellular organizations are achieved. How do cells rearrange themselves to form the complex cyto-architecture of skin appendages? What are the molecular b...

We report an infant delivered at 31 weeks gestation with restrictive dermopathy, which is a rare autosomal recessive genodermatosis. The baby had thin, tightly adherent skin that causes arthrogryposis and respiratory insufficiency. Histological findings of the skin include flat dermal-epidermal junction, thinned dermis with compactly arranged collagen fibers, and hypoplastic appendage structure...

Neurofibroma is a tumor composed of a complex proliferation of neuromesenchymal tissue (Schwann cells, perineural cells, fibroblast, and mast cells). We report a 45-year-old female who had a slow growing, large, soft, pedunculated mass on her left lateral neck. A skin biopsy confirmed the diagnosis of neurofibroma.

Tumor of follicular infundibulum (TFI) is a rare benign cutaneous appendage tumor that does not have characteristic clinical features. It mainly present in the head, neck, and trunk as solitary lesion. In particular, TFI typically manifests plate-like proliferation with multiple thin epidermal connections comprise monomorphic cells. do represent characteristics, but significance because associa...