Hidrocystoma (also known as cystadenoma, a Molls gland cyst, and a sudoriferous cyst) is an adenoma of the sweat glands. : 787 Hidrocystomas are cysts of sweat ducts, usually on the eyelids. : 664  They are not tumours (a similar-sounding lesion called hidroadenoma is a benign tumour). The three types of "sweat" glands are: True sweat glands or eccrine glands, sebaceous glands, which have an oily secretion around hair follicles, and apocrine glands, which have more oily product than eccrine glands and are found on the face, armpit, and groin. Hidrocystomas usually arise from apocrine glands. They are also called cysts of Moll or sudoriferous cysts. A type of hidroadenoma that arises from eccrine glands is uncommon. Other related conditions on the eyelids include chalazion (a granulomatous reaction to sebaceous glands on the eyelid), lacrimal duct cysts (cysts related to tear ducts), and nasolacrimal duct cysts (the nasolacrimal duct drains tears into the nose via a punctum on the lower eyelid). Additional images
See also
Syringoma
Acrospiroma
Seborrheic keratosis
List of cutaneous conditions
List of cutaneous neoplasms associated with systemic syndromes

References


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Lattice corneal dystrophy type is a rare form of corneal dystrophy. It has no systemic manifestations, unlike the other type of the dystrophy, Lattice corneal dystrophy type II. Lattice corneal dystrophy was first described by Swiss ophthalmologist Hugo Biber in 1890.Lattice dystrophy gets its name from an accumulation of amyloid deposits, or abnormal protein fibers, throughout the middle and anterior stroma. Presentation
Filamentous opacities appear in the cornea with intertwining delicate branching processes. During an eye examination, the doctor sees these deposits in the stroma as clear, comma-shaped overlapping dots and branching filaments, creating a lattice effect. Over time, the lattice lines will grow opaque and involve more of the stroma. They will also gradually converge, giving the cornea a cloudiness that may also reduce vision. The disease is bilateral, usually noted before the end of the first decade of life. Although lattice dystrophy can occur at any time in life, the condition usually arises in children between the ages of two and seven.In some people, these abnormal protein fibers can accumulate under the corneas outer layer—the epithelium. This can cause erosion of the epithelium. This condition is known as recurrent epithelial erosion. These erosions alter the corneas normal curvature, resulting in temporary vision problems, and expose the nerves that line the cornea, causing severe pain. Even the involuntary act of blinking can be painful. In systemic cases, kidney failure, heart failure and neuropathy such as facial nerve palsy, laxity of the skin may be noted.