Related Research Articles
Pityriasis rosea is a type of skin rash. Classically, it begins with a single red and slightly scaly area known as a "herald patch". This is then followed, days to weeks later, by a rash of many similar but smaller round or oval lesions, mainly on the trunk and upper limbs. About 20% of cases show atypical deviations from this pattern. It usually lasts less than three months and goes away without treatment. Sometimes malaise or a fever may occur before the start of the rash or itchiness, but often there are few other symptoms.
Dermatofibrosarcoma protuberans (DFSP) is a rare locally aggressive malignant cutaneous soft-tissue sarcoma. DFSP develops in the connective tissue cells in the middle layer of the skin (dermis). Estimates of the overall occurrence of DFSP in the United States are 0.8 to 4.5 cases per million persons per year. In the United States, DFSP accounts for between 1 and 6 percent of all soft tissue sarcomas and 18 percent of all cutaneous soft tissue sarcomas. In the Surveillance, Epidemiology and End Results (SEER) tumor registry from 1992 through 2004, DFSP was second only to Kaposi sarcoma.
Palmoplantar keratodermas are a heterogeneous group of disorders characterized by abnormal thickening of the stratum corneum of the palms and soles.
Aquagenic pruritus is a skin condition characterized by the development of severe, intense, prickling-like epidermal itching without observable skin lesions and evoked by contact with water.
A pancreatic pseudocyst is a circumscribed collection of fluid rich in pancreatic enzymes, blood, and necrotic tissue, typically located in the lesser sac of the abdomen. Pancreatic pseudocysts are usually complications of pancreatitis, although in children they frequently occur following abdominal trauma. Pancreatic pseudocysts account for approximately 75% of all pancreatic masses.
Hidradenoma refers to a benign adnexal tumor of the apical sweat gland. These are 1–3 cm translucent blue cystic nodules. It usually presents as a single, small skin-colored lesion, and is considered distinct from the closely related poroma. Hidradenomas are often sub-classified based on subtle histologic differences, for example:
A pyogenic granuloma or lobular capillary hemangioma is a vascular tumor that occurs on both mucosa and skin, and appears as an overgrowth of tissue due to irritation, physical trauma, or hormonal factors. It is often found to involve the gums, skin, or nasal septum, and has also been found far from the head, such as in the thigh.
Pruritic urticarial papules and plaques of pregnancy (PUPPP), known in United Kingdom as polymorphic eruption of pregnancy (PEP), is a chronic hives-like rash that strikes some women during pregnancy. Some skin changes are known to occur in people who are pregnant while other skin conditions, or dermatoses, that people have prior to getting pregnant will become altered or symptoms will increase. Pruritic urticarial papules and plaques of pregnancy (PUPPP) is one of many skin conditions that is specific to pregnancy and occurs in about 1 in every 160 (0.00625%) of pregnancies.
Cutis laxa or pachydermatocele is a group of rare connective tissue disorders in which the skin becomes inelastic and hangs loosely in folds.
A trichilemmal cyst is a common cyst that forms from a hair follicle, most often on the scalp, and is smooth, mobile and filled with keratin, a protein component found in hair, nails, skin, and horns. Trichilemmal cysts are clinically and histologically distinct from trichilemmal horns, which are much rarer and not limited to the scalp. Rarely, these cysts may grow more extensively and form rapidly multiplying trichilemmal tumors, also called proliferating trichilemmal cysts, which are benign but may grow aggressively at the cyst site. Very rarely, trichilemmal cysts can become cancerous.
Notalgia paraesthetica (NP) or notalgia paresthetica is a chronic sensory neuropathy. Notalgia paraesthetica is a common localized itch, affecting mainly the area between the shoulder blades but occasionally with a more widespread distribution, involving the shoulders, back, and upper chest. The characteristic symptom is pruritus on the back, usually on the left hand side below the shoulder blade. It is occasionally accompanied by pain, paresthesia, or hyperesthesia, which results in a well circumscribed hyperpigmentation of a skin patch in the affected area.
Large plaque parapsoriasis are skin lesions that may be included in the modern scheme of cutaneous conditions described as parapsoriasis. These lesions, called plaques, may be irregularly round-shaped to oval and are 10 cm (4 in) or larger in diameter. They can be very thin plaques that are asymptomatic or mildly pruritic. Large-plaque parapsoriasis is a common associate of retiform parapsoriasis, can be accompanied by poikiloderma vasculare atrophicans, and can in rare occasions be a precursor to cutaneous T-cell lymphoma.
Cutaneous amoebiasis, refers to a form of amoebiasis that presents primarily in the skin. It can be caused by Acanthamoeba or Entamoeba histolytica. When associated with Acanthamoeba, it is also known as "cutaneous acanthamoebiasis". Balamuthia mandrillaris can also cause cutaneous amoebiasis, but can prove fatal if the amoeba enters the bloodstream
Eccrine carcinoma is a rare skin condition characterized by a plaque or nodule on the scalp, trunk, or extremities. It originates from the eccrine sweat glands of the skin, accounting for less than 0.01% of diagnosed cutaneous malignancies. Eccrine carcinoma tumors are locally aggressive with a high rate of recurrence. Lack of reliable immunohistochemical markers and similarity to other common tumors has made identification of eccrine carcinoma difficult.
Pilomatricoma, is a benign skin tumor derived from the hair matrix. These neoplasms are relatively uncommon and typically occur on the scalp, face, and upper extremities. Clinically, pilomatricomas present as a subcutaneous nodule or cyst with unremarkable overlying epidermis that can range in size from 0.5-3.0 cm, but the largest reported case was 24 cm.
Cutaneous columnar cysts are a cutaneous condition, a group of different cysts lined by columnar epithelium. Types of cysts included in this group are:
An accessory auricle is considered a developmental anomaly resulting from the persistence of a structure which variably recapitulates the normal external ear.
Linear atrophoderma of Moulin is an acquired unilateral dermatitis localized along the Blaschko lines. It affects children or adolescents of both genders, involving the trunk and the limbs. It is, presumably, a rare cutaneous form of mosaicism. This disease was first referred to as Atrophoderma of Moulin after Dr.Moulin who first reported it in 1992 then was renamed as linear atrophoderma of Moulin. Only a few dozen cases have been described; for this reason, LAM is considered to be a very rare disorder.
Mesenteric pseudocyst is a mass in the abdomen that is devoid of any epithelial lining. They are caused either due to trauma or infection. The term mesenteric pseudocyst was first used by Ros et al in 1987. Mesenteric pseudocysts are very rare, making up only about less than one in 250,000 hospital admissions.
References
- 1 2 3 4 Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN 978-1-4160-2999-1.
- 1 2 James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: Clinical Dermatology. Saunders Elsevier. ISBN 978-0-7216-2921-6.
- ↑ Glamb, Roman; Kim, Robert (1984). "Pseudocyst of the auricle". Journal of the American Academy of Dermatology. 11 (1): 58–63. doi:10.1016/S0190-9622(84)70135-6. ISSN 0190-9622. PMID 6736353.
- ↑ Lim, C. M.; Goh, Y. H.; Chao, S. S.; Lynne, Lim (2002). "Pseudocyst of the Auricle". The Laryngoscope. 112 (11): 2033–2036. doi:10.1097/00005537-200211000-00022. ISSN 0023-852X. PMID 12439175. S2CID 26489593.
- ↑ Vishwakarma, S.K.; Deepak Gupta; S. K. Verma (1987). "Pseudocyst of the Auricle". Indian Journal of Otolaryngology and Head & Neck Surgery. 39 (4). doi:10.1007/BF03024762.