Medical Instructor, University of Puerto Rico School of Medicine
Consequently a new classification of specific dermatoses of pregnancy has emerged: pemphigoid gestationis heart attack 720p kickass purchase trandate once a day, polymorphic eruption of pregnancy blood pressure chart by weight order trandate online pills, intrahepatic cholestasis of pregnancy and atopic eruption of pregnancy [2 pulse pressure difference safe 100 mg trandate,3]. Epidemiology Polymorphic eruption of pregnancy is a benign, selflimiting pruritic inflammatory disorder that usually affects primigravidae in the last few weeks of pregnancy or immediately postpartum (15%) [3]. Its incidence is about 1: 160 pregnancies and it is associated with excessive maternal weight gain and multiple pregnancy [3,4]. The main theories proposed focus on abdominal distension and hormonal and immunological factors [3,5]. Although a previous study found no link with high fetal birth weight [3], this has previously been thought to be an association [5]. Hormonal and immunological changes have not definitively been shown to play a role; nor has an association with increased birth weight or male sex of the newborn been confirmed [3,6]. Clinical features Presentation Polymorphic eruption of pregnancy typically starts on the abdomen, often within the striae distensae if present, with severely pruritic urticarial papules that coalesce into plaques, spreading to the buttocks and proximal thighs (Figures 115. Often the eruption remains on these sites but it can quickly become generalized in severe cases. In contrast to pemphigoid gestationis, umbilical sparing is a characteristic finding. Lesions are selflimiting and the disease tends not to recur; the exception being in a multiple pregnancy, when earlier presentation in pregnancy may occur. Resources Further information British Association of Dermatologists, leaflet. Investigations the histopathology of this condition is nonspecific and there are many similarities with the early prebullous phase of pemphigoid gestationis. Most biopsies show epidermal and upper dermal oedema, with a perivascular infiltrate of lymphocytes and histiocytes. There may be a striking number of eosinophils (as there may be in pemphigoid gestationis). Spongiotic vesicles are also seen, as are hyperkeratosis and patchy parakeratosis [2]. Direct immunofluorescence is generally negative, even by immunoelectron microscopy, and this provides the best means of distinguishing this disorder from pemphigoid gestationis should there be any diagnostic doubt [8]. It can also occur in association with trophoblastic tumours (choriocarcinoma, hydatidiform mole). There is also an increased risk of developing other organspecific autoimmune diseases, in particular Graves disease. Management Symptomatic treatment with topical corticosteroids and emollients, with or without antihistamines, is usually sufficient to control pruritus and skin lesions. Most women are relieved to learn that the condition is not serious, that all should be well with them and their baby and that the rash will disappear at, or soon after, delivery [4,5]. Of interest, the primary site of autoimmunity seems not to be the skin, but the placenta, as antibodies bind not only to the basement membrance zone of the epidermis, but also to that of chorionic and amniotic epithelia, both equally of ectodermal origin.
Associated diseases Generalized lentiginosis has been rarely associated with the development of melanoma normal blood pressure chart uk purchase trandate 100 mg with visa. There has been a single case report of a patient with lentiginoses and gastrointestinal stromal tumours harbouring a ckit gene mutation [7] blood pressure joint pain purchase trandate no prescription. Simple lentigines did not show mutations in any of these genes and thus are genetically differentiated from melanocytic naevi and solar lentigines coenzyme q10 high blood pressure medication buy 100 mg trandate with amex. Environmental factors the role of sunlight is the most important environmental factor. There may be slight scaling of the surface, and several neighbouring lesions may coalesce. Their colour is pale to deep brown, depending on the skin colour of the individual. Predisposing factors Part 12: NeoPlasia There have been reports of lentigines developing after topical immunotherapy with tacrolimus, squaric acid dibutylester and diphencyprone [8,9]. Melanin hyperpigmentation is noted in melanocytes, adjacent keratinocytes and melanophages in the papillary dermis (Figure 132. The epidermal rete ridges are usually elongated and there might be a mild inflammatory infiltrate in the upper dermis. Differential diagnosis the differential diagnosis of lentigines from freckles is made clinically by their comparatively darker colour, more scattered distribution and by their unchanged status in relation to sunlight exposure. In contrast to freckles, lentigines present histologically with an increased number of melanocytes. The differentiation of lentigines from small junctional naevi is often impossible on clinical grounds. On histology, naevi show Genetics Multiple lentigines arising early in life on both exposed and non exposed areas are usually a manifestation of inherited syndromes Simple lentigo 132. These transitional lesions may be regarded as precursors of future melanocytic naevi [1]. Investigations With dermoscopy, lentigines show scalloped borders, a faint irregular network or pseudonetwork and structureless areas (Figure 132. This overlap is clinically insignificant, as both are markers of light skin complexion, excessive sun exposure and a certain risk of skin cancer (see Chapter 143). As the majority arise in sunexposed areas, photoprotection could decrease the rate of new lesions developing. For cosmetic reasons, a variety of depigmenting topical agents and dermatological procedures such as chemical peels, lasers and photodynamic therapy reduces their pigmentation (see Chapters 159 and 160) [8]. In patients with multiple lentigines arising early in life on nonsunexposed sites, the possibility of a hereditary multisystem syndrome (Table 132. In the very rare cases of generalized lentiginoses, individuals may be at increased risk for melanoma, and thus should be educated on avoidance of sunburn and self skin examination. Environmental factors Solar lentigines are associated with both intermittent and chronic sun exposure [3]. Solar lentigines on the back have also been associated with a history of sunburns before the age of 20 years, while facial solar lentigines have been associated with cutaneous signs of photodamage [3]. They are macular, tan coloured and may be very large, with a striking irregular border. There is frequently a history of acute sunburn, followed by the sudden appearance of large numbers of these irregular macular lesions [13,14].
Histopathological techniques [13] For foreign bodies below the limits of detectability by imaging techniques blood pressure viagra order cheap trandate on-line, it may be possible to make a diagnosis on material taken at biopsy by microscopic or ultrastructural techniques heart attack warnings buy trandate online from canada. Some foreign materials have a distinctive microscopic structure high blood pressure medication and xanax purchase trandate on line, for example the regular arrays of plant cells in some vegetative material, such as Foreign-body reaction table 123. Selfinflicted H&E (P if talc from tablets is used); thrombosis and fibrosis Goldman [56] Weedon et al. Most instances of paraffinoma nowadays are caused by misguided attempts at tissue augmentation, often selfadministered. The penis is the most common site [1]; other sites include the male breast [2], gluteal regions and extremities. Paraffin gauze that was used to pack the nasal passages and sinuses has caused chronic inflammatory paraffinoma of the periorbital tissues [3,4]. A study of 11 patients with periocular deposition of petrolatumbased material demonstrated a range of iatrogenic causes, including ointment being applied to the eyelid skin, to the canaliculi and to the ethmoid cavities following surgery [5]. Longstanding changes occurring around major joints can lead to myofibrosis with contractures [2]. Another case of a bodybuilder using anaebolic steroids has been described, with granulomatous inflammation and ossification [3]. Many of the reported adverse effects are likely to have been a result of adulterants, although even medicalgrade silicone can produce a granulomatous reaction [1,2] When silicone baggel material ruptures, it can migrate along fascial planes and gravitate into the skin, producing indurated inflammatory subcutaneous masses [3]. Following liquid or gel silicone injections, the histological appearance is of varying sized vacuoles similar to paraffinoma, but with less fibrosis and usually an absence of granulomatous response if medicalgrade silicone is used [4]. After some months, it resembles a patch of scleroderma, ivory white in colour with a surrounding lilac ring. A case has been reported of similar changes occurring on the upper arms, where intramuscular injections of vitamin K had been administered [1]. All the nine cases studied by Texier [3] had received other vitamins, liver extract or iron injections and no case resulted from vitamin K alone, but this ingredient was a common factor. There is a tendency for sclerotic reactions to resolve slowly following withdrawal of vitamin K injections [1,4]. Intradermal testing with vitamin K produced erythema and induration at 2 days in one reported case [4]. Localized sclerodermoid skin reactions have also been reported occurring at the site of intramuscular injections of vitamin B12 [5,6]. A case has been reported of widespread granulomatous papules developing many years after liquid silicone injection into the face [8]. It was suggested that the granulomatous response to silicone in this case occurred as a manifestation of sarcoidosis [9]. Particles of rubbery silicone elastomer can elicit a vigorous foreignbody granulomatous response. Ameloriation of the inflammatory response by treatment with minocycline has been reported [10]; however, a variety of topical and system agents have been thought to be useful in case reports [11]. Fibreglass dermatitis Reactions to glass fibre are usually caused by physical injury, although allergic contact dermatitis resulting from residual epoxy resin on the fibres has been described [1]. Pruritus is very common and may occur with or without skin lesions, which, if present, usually consist of transient erythematous papules that are often follicular.
The reaction normally affects only the face blood pressure chart in pdf buy trandate 100mg lowest price, especially in association Chemical burns 129 blood pressure juice order trandate 100 mg with mastercard. However prehypertension causes symptoms purchase trandate 100mg line, equal numbers of atopics and nonatopics con stituted the sensitive skin group, indicating that other variables were involved. Investigations Sometimes patch testing can be helpful to eliminate other differ ential diagnoses. Management Treatment is largely that of avoidance, although strontium salts have been shown experimentally to inhibit the sensation [8]. Chemical burns Definition A chemical burn results when tissue is exposed to a corrosive chemical, such as a strong acid or alkali. It is an idiosyncratic response, and only a proportion of the population will be affected. Individuals can be screened to ascertain whether they are sting ers or not by the application of 5% aqueous lactic acid to the nasolabial fold after induction of sweating. There is usually rapid onset of painful erythema, often within min utes, at the site of exposure, followed by blistering and the devel opment of necrotic ulcers. Symptoms coincide with the exposure, but with some chemicals, including phenols and weak hydrofluoric acid, the onset may be delayed. Damage continues to occur until all of the agent has chemically reacted or has been neutralized as a result of treatment. Occupa tional settings are still common for chemical burns but the fre quency of domestic settings is increasing [1]. Dry skin and a predisposition to blushing/ flushing were factors associated with a sensitive skin. The majority of chemical burns involved the upper limb, with most occurring in young adults and infants. Occupa tional chemical burns are also relatively common, with 29% of chemical burns requiring admission being work related, with a rate of 26. Age Limited data suggest that those of working age suffer most from chemical burns [1]. Associated diseases Sometimes scars following burns may lead to functional disability, such as joint contractures. Reepithelialization begins from the residual adnexal structures, taking up to 6 weeks to occur, with scarring. Management Knowledge of the chemical causing the burn is vital, as decon tamination or other specific neutralization may be required. Ini tial treatment of chemical burns [6,7] requires irrigation with large volumes of lukewarm water and removal of contaminated cloth ing. Where the chemical is insoluble in water, a soap solution or solvent may be used instead. High pressures should not be used, to avoid splashing other areas of the body or bystanders with the corrosive material. Although neutralizing solutions offer an alternative to irriga tion, theoretically an exothermic reaction and potential delay in obtaining the treatment might result in increased tissue damage, and they are not generally recommended [8].
Clear pathways of care and links with other specialites including plastic surgery blood pressure medication reactions discount trandate 100mg, urology blood pressure nicotine buy generic trandate from india, paediatrics heart attack medication buy 100mg trandate free shipping, psychology and psychosexual medicine are important in the management of specific conditions. The history must include the nature and duration of the presenting complaint, how the problem changes. This is important as a patient with itch will scratch or rub the skin, and the response will be lichen simplex or lichenification, whereas with discomfort or pain there will be no such change as the patient avoids touching the area. A personal and family history of autoimmune disease, atopy or psoriasis should be established, together with any known skin sensitivities. The patient should also be asked about vaginal discharge, urinary symptoms and bowel function. It is helpful to know if there have been any abnormalities with cervical cytology and also whether the patient smokes cigarettes, as this is a major risk factor for intraepithelial neoplasia. Finally, as the vulva is important for normal sexual function, relevant questions should be included where appropriate. The examination is often embarrassing for the patient, so must be carried out sympathetically. A methodical approach will ensure that all areas of the vulva and perianal skin are examined fully. It is important to know the normal anatomy of the vulva as some dermatoses result in scarring and therefore architectural changes can give diagnostic clues. The examination must also include inspection of other flexural sites and mucosae, the scalp and nails. The vagina and cervix should be examined in patients who have dermatoses that affect the mucosal surfaces and in patients with symptoms of dyspareunia, vaginal discharge or postcoital bleeding. Vulval biopsy is often required and very useful in the diagnosis of anogenital dermatoses. However, careful clinicopathological correlation and discussion with a dermatopathologist is vital. Some investigations are not the usual remit of the dermatologist but are necessary in patients with anogenital dermatoses, for example cervical smear and proctoscopy. Structure and function of the female genitalia the vulva is the collective term used for the structures that comprise the female external genitalia. Anatomically, it is the region known as the urogenital triangle, bounded anteriorly by the symphysis pubis, the pubic rami laterally and the transverse perineal body posteriorly. The vulval structures included within this area are the mons pubis, labia majora and labia minora, clitoris, vulval vestibule and hymen (Figure 112. It is recognized that there can be a wide variety in size and appearance of these components [1,2]. The epithelia that cover the vulva change from skin on the outer aspects to mucosa on the inner aspects of the labia minora. The labia majora are paired, rounded folds of skin and are the homologue of the scrotum. They extend downwards and backwards from the mons pubis and meet posteriorly in the midline to form the posterior commissure, which lies approximately 2 cm anterior to the anus. The structure is similar to that of the mons pubis in that there is a thick layer of adipose tissue and a dense distribution of hair on the outer surfaces of the labia. The inner aspects of the labia majora fuse into the outer aspects of the labia minora laterally, forming the interlabial sulci. The labia minora are the equivalent of the male prepuce, and are paired pendulous folds, which lie between the labia majora and the vulval vestibule. If an unusual or sexually transmitted infection is high on the differential diagnosis, it is important to involve a genitourinary physician in the investigation and workup of these patients and their sexual partners.
