Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Hyperpigmentation”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 883 records · Page 49Linked to original sources

Chemotherapy and cutaneous toxicities: implications for oncology nurses.

OBJECTIVE: To review common cutaneous effects and dermatologic or cutaneous toxicities related to the administration of chemotherapy. These range from mostly cosmetic, such as hyperpigmentation or alopecia, to dose-limiting toxicities such as palmar-plantar erythrodysesthesia or hand-foot syndrome. DATA SOURCES: Current research, published literature, and internet resources. CONCLUSION: Assessment and grading of associated toxicities of therapy is an integral part of caring for this patient population. Early intervention may reduce toxicities associated with therapies for this patient population IMPLICATIONS FOR NURSING PRACTICE: As more patients receive chemotherapy, dermatologic effects are becoming more common. Oncology nurses must be skilled in managing these side effects.

Alopecia↗

Chronic cutaneous damage after accidental exposure to ionizing radiation: the Chernobyl experience.

BACKGROUND: The hazards of acute radiation exposure are well known. Bone marrow failure from total body gamma or neutron irradiation is the most clinically relevant aspect of acute radiation disease. With nonhomogeneous exposure, as is characteristic in accidents, other organ systems, such as the skin, may be more important in determining clinical prognosis. This became obvious in the two worst radiation accidents since 1945, the Chernobyl accident in April 1986 and the Goiania accident in September 1987. OBJECTIVE: Our purpose was to describe the characteristic chronic sequelae of accidental cutaneous radiation in a group of patients who survived the Chernobyl nuclear power plant accident. METHODS: Fifteen patients with the delayed type of the cutaneous radiation syndrome were examined between September 1991 and January 1992. All patients had a history of acute radiation disease. The exposure pattern was characterized by partial body exposure with high doses of beta and gamma irradiation from radioactive water, steam, or dust. RESULTS: Radiation-induced lesions were confined primarily to the legs and distal arms, but sometimes involved up to 50% of the total body surface. In addition to telangiectases, radiation keratoses, and radiation ulcers, hemangiomas, hematolymphangiomas, splinter hemorrhages in the distal nail bed, lentiginous hyperpigmentation, and severe subcutaneous fibrosis were noted. No malignant transformation could be detected. Associated diseases included cataracts, chronic hepatitis, and recalcitrant bacterial and herpesvirus infections. CONCLUSION: After accidental partial body exposure to high doses of beta and gamma irradiation, the predominant involvement of the skin, described as the cutaneous radiation syndrome, can become the characteristic feature. This causes longlasting, serious diagnostic and therapeutic problems.

Accidents↗

Blue vitiligo.

The progression of vitiligo and postinflammatory hyperpigmentation simultaneously in a patient with AIDS led to the appearance of a blue color on much of the patient's skin. The blue coloration subsequently resolved with follicular repigmentation typical of resolving vitiligo. We believe this is the first reported case of "blue vitiligo."

Adult↗

Hutchinson's sign: a reappraisal.

Hutchinson's sign, periungual extension of brown-black pigmentation from longitudinal melanonychia onto the proximal and lateral nailfolds, is an important indicator of subungual melanoma. However, experience has demonstrated that Hutchinson's sign, although valuable, is not an infallible predictor of melanoma. Periungual pigmentation is present in a variety of benign disorders and, therefore, may lead to overdiagnosis of subungual melanoma. Periungual hyperpigmentation occurs in at least one nonmelanoma skin cancer, Bowen's disease of the nail unit. Hyperigmentation of the nail bed and matrix may reflect through the "transparent" nailfolds simulating Hutchinson's sign. "Pseudo-Hutchinson's sign" is a phrase coined to encompass these three simulants of Hutchinson's sign. Each represents a misleading clue to the diagnosis of subungual melanoma. Total reliance on the (apparent) presence or absence of periungual pigmentation may lead to overdiagnosis or underdiagnosis of subungual melanoma. All relevant clinical and historical information, including the presence or absence of periungual pigmentation, must be carefully evaluated in a patient suspected of having subungual melanoma. Ultimately, the diagnosis of subungual melanoma is made histologically.

Humans↗

Long-term results after CO2 laser skin resurfacing: a comparison of scanned and pulsed systems.

BACKGROUND: New laser technology permits the use of high-energy pulsed and continuous-wave carbon dioxide (CO2) lasers with flashscanners to treat rhytides. OBJECTIVE: We compared the efficacy and side effects of the two leading CO2 lasers used in skin resurfacing. METHODS: A total of 28 patients with facial rhytides were treated with either the UltraPulse or SilkTouch laser systems; in five additional patients, contralateral cosmetic units were treated with one system or the other in a direct comparison of the lasers. RESULTS: We compared photographs taken before and after treatment, and a lessening of facial wrinkling was noted in all subjects. In some subjects improvement was confirmed by optical profilometry methods. Biopsy specimens in representative patients showed that immediate thermal damage was limited to 180 microns. Long-term postoperative specimens showed changes in the papillary dermis consistent with new collagen deposition and reduction of pretreatment solar elastosis. Posttreatment facial erythema was noted in half the patients for up to 2 months; transient hyperpigmentation was observed in one third of the treated areas. CONCLUSION: Although the SilkTouch system produced more immediate thermal damage, there were no significant differences in efficacy or adverse effects between the lasers. Our results suggest that both laser systems, used with appropriate settings, are capable of safely smoothing the skin surface.

Adult↗

Surgical management of post-burn skin dyspigmentation of the upper limb.

The technique and results of surgery in 23 patients with skin dyspigmentation of the upper limb are presented. The study population was divided into two groups. Group A (n=15 patients) had hyperpigmented skin grafts in the palm or the palmar aspect of the digits. All patients underwent excision of the hyperpigmented grafts and coverage with split-thickness plantar skin grafts. The plantar grafts gave an excellent colour and texture match and all patients were satisfied with the result. Group B (n=8 patients) had post-burn hypopigmentation on the dorsal aspect of digits, hand or forearm. These patients underwent dermabrasion and thin split-thickness grafting harvested from the upper thigh or buttock. All grafts healed well with no residual hypopigmentation. However, the graft was slightly hyperpigmented when compared to the surrounding skin. Despite this complication, all patients were satisfied and considered this slight hyperpigmentation much better than the preoperative hypopigmentation. The pathogenesis of skin dyspigmentation and other treatment techniques are discussed.

Adolescent↗

Laser resurfacing of darkly pigmented patients.

Hyperpigmentation following laser resurfacing in darker-skinned individuals is common but treatable. This pigmentation is usually heralded by persistent erythema and can be prevented in most patients if aggressive laser resurfacing is curtailed and conservative or single-pass techniques are applied. Avoiding excessive intraoperative frictional trauma when removing the desiccated tissue Avoiding excessive intraoperative frictional trauma when removing the desiccated tissue and potentially irritating agents or infections in the pre- or postoperative period is also instrumental in avoiding long-term complications.

Aged↗

Acute haptic-induced pigmentary glaucoma with an AcrySof intraocular lens.

A 49-year-old man had uneventful endocapsular phacoemulsification with in-the-bag implantation of an AcrySof SA60AT single-piece intraocular lens (IOL) (Alcon) in the right eye. Twenty-seven days postoperatively, he presented with ocular pain, intraocular pressure of 48 mm Hg, 360 degrees of hyperpigmentation of the trabecular meshwork, and iris pigment epithelial atrophy in the region of the upper temporal haptic, which had dislocated into the sulcus. The patient made an excellent recovery following IOL removal and exchange. Scanning electron microscopy of the explanted IOL demonstrated that the haptic had a rough lateral surface and anterolateral edge. We do not think this IOL should be implanted in the sulcus placement of the heptics. In this article, we report the case of a patient with an AcrySof SA60ATIOL (Alcon) who developed acute pigmentary glaucoma when the inferior haptic slipped out of the bag and came into contact with the pigmented iris and ciliary body.

Acrylic Resins↗

Idiopathic lenticular mucocutaneous pigmentation (Laugier-Hunziker syndrome): a report of a case.

Laugier-Hunziker syndrome (LHS) is an acquired, benign, macular hyperpigmentation of the lips and oral mucosa, often associated with pigmentation of the nails. It is a rare disorder thought to be more common than the number of reported cases would suggest. It is important to include this condition in the differential diagnosis of diffuse oral pigmentation. Here we report the first case of the Laugier-Hunziker syndrome in Scandinavia. Other conditions causing diffuse or multifocal pigmented oral lesions are discussed.

Diagnosis, Differential↗

5,6-Dihydroxyindoles in the fenton reaction: a model study of the role of melanin precursors in oxidative stress and hyperpigmentary processes.

Increasing evidence supports the view that diffusible melanin-related metabolites do not serve merely as pigment precursors, but may also act as modulators of the responses of the pigmentary cell melanocyte to external stimuli, especially to inflammation. In this study, the effect of melanin precursors 5, 6-dihydroxyindole (DHI) and 5,6-dihydroxyindole-2-carboxylic acid (DHICA) on the Fenton-induced oxidation of deoxyribose was investigated as a model of the oxidative stress processes triggered by the release of iron during inflammation. DHICA caused a powerful inhibition of the H(2)O(2)-Fe(II)/EDTA oxidation under both aerobic and anaerobic conditions, proving to be more efficient than typical hydroxyl radical (HO(*)) scavengers even at low concentrations with respect to deoxyribose. Conversely, DHI in air was a prooxidant at low indole:Fe(II) ratios, but shifted to an antioxidant at higher ratios (>6). The magnitude of the prooxidant effect increased by lowering the pH of the medium or by replacing Fe(II) with Fe(III), but was suppressed by exclusion of oxygen. Both the indoles retained their effects on the Fenton reaction in the absence of EDTA, as a result of their ability to chelate iron ions as evidenced by spectrophotometric experiments. Investigation of the reaction of DHI and DHICA with the Fenton reagent led to the conclusion that the indoles interact efficiently with HO(*), yielding indolesemiquinone species which are then converted to melanin pigments by self-coupling or disproportionation. At low DHI:iron molar ratios, the ability of semiquinones, generated by autoxidation of indoles, to recycle Fe(II) ions prevails, accounting for the observed prooxidant effect. Collectively, the results of this study provide new evidence for melanogenic 5,6-dihydroxyindoles as a novel class of biological antioxidants and point to these compounds as the key to interpreting the response of melanocytes to oxidative injuries. Moreover, the rapid formation of melanin following the exposure of 5, 6-dihydroxyindoles to the Fenton oxidation suggests new mechanisms of skin hyperpigmentation associated with inflammation.

Carbon Dioxide↗

Malignant acanthosis nigricans: potential role of chemotherapy.

Acanthosis nigricans is an uncommon skin condition characterized by hyperkeratosis and skin hyperpigmentation. Most causes are benign, but it may also be associated with gastrointestinal and other malignancies. When associated with malignant disease, the skin pathology may be more severe and treatment often unsuccessful. We describe a 66-year-old man with acanthosis nigricans associated with carcinoma of the stomach, with distressing generalized cutaneous, perioral and perineal disease, whose skin condition resolved completely with combination chemotherapy. In patients with malignant acanthosis, chemotherapy may relieve many of the distressing cutaneous symptoms. A close liaison between gastroenterologists, dermatologists and oncologists is required.

Acanthosis Nigricans↗

Response of livedoid vasculitis to intravenous immunoglobulin.

Livedoid vasculitis is a chronic condition characterized by recurrent painful ulceration of the lower limbs, which heals to leave atrophie blanche surrounded by hyperpigmentation and telangiectasia. We report two patients with livedoid vasculitis who, after failure of conventional therapies, responded to intravenous immunoglobulin (IVIg). There was healing of areas of active ulceration and improvement of erythema, swelling and pain. IVIg has been used successfully to treat a variety of vasculitic disorders and appears to be well tolerated. We suggest that this treatment is offered to patients who have livedoid vasculitis that is unresponsive to other therapies.

Adult↗

Dowling-Degos disease associated with squamous cell carcinomas on the dappled pigmentation.

We report the first case of Dowling-Degos disease associated with squamous cell carcinomas (SCCs) in the pigmented area of Dowling-Degos disease. A 64-year-old Japanese man manifested dappled pigmentation unusually localized to the buttocks, and two pigmented adenoid SCCs had developed on his left pigmented buttock. The other findings of Dowling-Degos disease were comedone-like lesions on the face and back, a finger-like fibroma in the right popliteal fossa, dystrophic fingernails, and a large number of seborrhoeic keratosis-like lesions predominantly on the flexural areas. Another unique clinical feature was the lack of vellus hair on the whole body surface. In addition to thin branching and elongation of rete ridges with basal hyperpigmentation, immature hair follicles surrounded by fibrosis and a lace-like pattern of the hair follicle epithelia were observed histologically. These epithelial hamartomatous features were consistent with Dowling-Degos disease. We speculate that the SCCs developed in relation to an underlying naevoid anomaly in pilosebaceous epithelia of Dowling-Degos disease.

Buttocks↗

Increased procollagen alpha1(I) mRNA expression by dermal fibroblasts in melorheostosis.

We report a patient with melorheostosis in whom increased procollagen alpha1(I) mRNA expression and alpha1(I), alpha2(I) and alpha1(III) collagen secretion were observed in dermal fibroblasts obtained from a skin biopsy overlying the involved bone. The patient was a 53-year-old man with melorheostosis lesions over the left knee joint. Multiple pigmented macules were present on the medial aspect of the lower left leg. Hyperpigmentation of the basal keratinocytes, thick-walled vessels in the reticular dermis, and proliferation of normal-appearing collagen around the hair follicles were observed histologically.

Fibroblasts↗

Pigmentary mosaicism with mosaic chromosome 5p tetrasomy.

Pigmentary mosaicism with mosaic chromosome 5p tetrasomy is described. A 5-year-old girl had phylloid hyperpigmentation segregated in the midline, and neurological deficits. Chromosome analysis performed on blood lymphocytes was normal, whereas skin fibroblasts from affected skin areas revealed chromosomal mosaicism.

Aneuploidy↗

Clinical features of Ota's naevus in Koreans and its treatment with Q-switched alexandrite laser.

Ota's naevus is a fairly common pigmentary disorder in Asians. Recently, encouraging results in the treatment of Ota's naevus have been obtained, but most of these concerned the white skins of Caucasian patients. Our purpose was to examine the clinical features of Ota's naevus in Koreans and to assess the clinical outcomes and histological changes induced by a Q-switched alexandrite laser at 755 nm. Eighty-seven Koreans with Ota's naevus were studied; the peak age of onset was during the first decade and adolescence. The infraorbital area was the most frequent site and black or dark brown colours predominated. Improvements were achieved in 52 patients (77%). Better results were obtained in unilateral lesions and patients who received a greater number of treatments. Mild hyperpigmentation after treatment was noticed in 14 patients and mild hypopigmentation in eight patients. However, all of these were reversed in time. Hypertrophic scarring or secondary infection did not occur. The histology of laser-irradiated lesions showed selective thermal damage of melanocytes in the upper dermis and the elimination of upper dermal pigmentation. Our clinical data demonstrate the usefulness of the Q-switched alexandrite laser for the treatment of Ota's naevus in brown skin.

Adolescent↗

Tattoo ink darkening of a yellow tattoo after Q-switched laser treatment.

The popularity of tattoos is burgeoning with 20-30 million tattooed individuals in the Western World. Requests for removal can be expected to rise concurrently with increased applications. Laser removal of tattoos is potentially a more cosmetically acceptable method of removing tattoos than surgical excision or dermabrasion. Nevertheless, complications and side-effects can result from laser treatment and include scarring, hypopigmentation, hyperpigmentation, partial removal, infection, bleeding and tattoo ink darkening. The latter has been reported for flesh-toned and red tattoos. Such a complication has never been reported for the laser treatment of a yellow tattoo in the dermatological literature. We describe a case of tattoo ink darkening of a yellow tattoo after treatment with the 532 nm quality-switched Neodymium : Ytrrium-Aluminium Garnet laser to highlight clinicopathological features. The mechanism by which some tattoos darken after laser treatment is not clearly understood. We review darkening of tattoos after laser treatment to raise awareness of this important complication. This paper will help to facilitate discussions with the patient and in obtaining informed consent prior to commencing treatment. Tattoo ink darkening of a yellow tattoo adds to the growing list of complications resulting from attempts at tattoo removal.

Color↗

Chronic intoxication by doxycycline use for more than 12 years.

We report the clinical case of a 12-years' intoxication by doxycycline. A patient with a depersonalization and derealization syndrome took 1 g doxycycline per day. In addition to hepatocellular necrosis with cholestasis, nephrotoxicity, leukopenia, anaemia and skin hyperpigmentation he suffered from hitherto unreported adverse cardiac events as intermittent supraventricular tachycardia and sporadic Wenckebach heart block. Despite a long period of self-medication these side-effects were reversible.

Adult↗