Bariatric surgery - a dermatologic perspective

Dermatological manifestations relating to nutritional deficiencies after bariatric surgery: case report and integrative literature review

BACKGROUND

The number of bariatric surgeries performed worldwide is growing. Among the main short, medium or long-term complications after surgery are nutritional deficiencies. Many of these, such as those of Zn, Cu and vitamins A, B1, B3, B6 and B12, are manifested by dermatological lesions before potentially fatal systemic disorders occur.

OBJECTIVE

To identify the main dermatological manifestations associated with nutritional deficiencies after bariatric surgery, and the associated variables.

DESIGN AND SETTING

Integrative literature review carried out at a public university in Brazil.

METHODS

This was a case report and a review of health research portals and databases of national and international biomedical journals, without publication date limitation. The descriptors used for searches followed the ideal methodology for each database/search portal: "bariatric surgery", "skin", "skin disease", "skin manifestation", "deficiency disease" and "malnutrition".

RESULTS

A total of 59 articles were selected, among which 23 were review articles or articles that addressed specific dermatological manifestations. The other 36 articles described 41 cases, which were organized into a table with the clinical variables.

CONCLUSIONS

Although nutritional deficiencies are expected as complications after bariatric surgery, few articles relating them to their dermatological manifestations were found. It is important to recognize skin changes caused by nutritional deficiencies in patients treated via bariatric surgery, as these may occur before systemic complications appear and are easier to diagnose when the patient does not have any systemic symptoms yet. However, there is generally a delay between the appearance of skin lesions and making the diagnosis of nutritional deficiency.

Skin manifestations after bariatric surgery

Background

Skin signs observed in morbid obesity may change as the weight reduces, especially post-bariatric surgery (BaS). Data concerning the skin findings exclusively in post-BaS patients remain limited.

Methods

Seventy post-BaS patients were examined for cutaneous abnormalities. The patients were divided into those with successful weight loss (% excessive body weight loss (EBWL) of at least 50%) and a non-successful group (%EBWL < 50%).

Results

Forty-six patients with successful weight loss demonstrated a significantly lower prevalence of acanthosis nigricans on the neck, axillae and inguinal areas, keratosis pilaris (KP) and pebble fingers. However, a higher prevalence of alopecia was observed. After adjustment with patients’ factors, KP (adjusted odds ratio (aOR) = 0.21, 95%CI 0.06–0.74, p = 0.02) and pebble fingers (aOR = 0.09, 95%CI 0.01–0.89, p = 0.04) remained significantly less likely in patients with successful weight loss. Laboratory results comparing pre- and post-surgery values revealed significant decreases in fasting plasma glucose, hemoglobin A1c, and triglyceride and an increase of high-density lipoproteins in both groups. However, significant decreases of liver aminotransferases (AST and ALT) were observed only in the successful group (p = 0.04, 0.003). Nonetheless, a decrease in vitamin B12 (p = 0.01) was observed in the successful group.

Conclusion

Weight loss after BaS provided an improvement for metabolic profiles. Successful weight reduction resulted in better skin improvement. However, nutritional supplements may be necessary.

Trial registration

Thai Clinical Trials Registry TCTR20171003002. Registered October 3. 2017, retrospectively registered.

[Differential diagnostics of lipedema and lymphedema : A practical guideline]

Lipedema is a symmetrical disorder of the subcutaneous adipose tissue that affects almost exclusively women in postpubescent age. The trinity of disfiguring hyperplastic adipose tissue of the proximal extremities, increasing pain over time and bruising is characteristic. Lymphedema can occur in both sexes and is differentiated into primary and secondary subtypes. Symmetry is not a prerequisite for diagnosis. Characteristic for lymphedema is the disproportion between lymphatic fluid and the capacity of lymphatic vessels. The most distal body parts are always more severely affected than proximal parts. In the initial phases lymphedema is painless but in advanced stages tension pain can occur. The combination of both disorders has been described; however, lipedema is not responsible for subsequent lymphedema in contrast to central obesity, which significantly increases the risk of lymphedema. The differential diagnosis is of utmost importance for a meaningful management.

[Differential diagnostics of lipedema and lymphedema : A practical guideline]

Lipedema is a symmetrical disorder of the subcutaneous adipose tissue that affects almost exclusively women in postpubescent age. The trinity of disfiguring hyperplastic adipose tissue of the proximal extremities, increasing pain over time and bruising is characteristic. Lymphedema can occur in both sexes and is differentiated into primary and secondary subtypes. Symmetry is not a prerequisite for diagnosis. Characteristic for lymphedema is the disproportion between lymphatic fluid and the capacity of lymphatic vessels. The most distal body parts are always more severely affected than proximal parts. In the initial phases lymphedema is painless but in advanced stages tension pain can occur. The combination of both disorders has been described; however, lipedema is not responsible for subsequent lymphedema in contrast to central obesity, which significantly increases the risk of lymphedema. The differential diagnosis is of utmost importance for a meaningful management.

Post-bariatric surgery hidradenitis suppurativa: a new patient subset associated with malabsorption and micronutritional deficiencies

BACKGROUND

Bariatric surgery (BS) represents the most effective treatment for morbid obesity and its related complications, potentially ameliorating chronic comorbid inflammatory skin conditions, such as psoriasis and hidradenitis suppurativa (HS). Weight-loss interventions are strongly encouraged in patients with HS, but the resulting effect on the course of the disease has been poorly reported.

AIM

To describe the effect of BS-associated weight-loss on the course of HS.

METHODS

This was a retrospective, descriptive study of a hospital-based patient cohort with HS in order to investigate the relationship between exposure to a BS procedure and the HS disease course. Clinical characteristics and BS-related outcomes were retrospectively analysed by chart review for identified cases. Laboratory parameters for selected micronutrients (levels of vitamin A, D and B12, plus zinc and iron) were re-evaluated at a follow-up visit in each post-BS case. Typical patients with HS from the general cohort served as controls for the comparison of vitamin D and zinc serum levels.

RESULTS

Of 178 patients with HS, 12 patients with incident HS who had undergone a BS procedure were identified. A subset of patients (n = 10) developed initial signs and symptoms of cutaneous suppuration after experiencing weight loss related to malabsorptive bariatric procedures. Post-BS patients with HS presented multiple micronutritional deficiencies and insufficient responses to standard, first-line antibiotic treatments. Of the micronutrients we selected for analysis, zinc was found to be at significantly lower serum levels in post-BS patients with HS compared with typical patients with HS.

CONCLUSIONS

Post-BS HS may represent a new patient subset, requiring customized clinical management.

Management of stretch marks (with a focus on striae rubrae)

Stretch marks are one of the most common benign cutaneous lesions and encountered esthetic problems. Striae rubrae and striae albae can be differentiated on the basis of clinical appearance. Histologically, disturbances of the dermal fiber network and local expression of receptors for sexual steroids have been detected. The epidermal changes are secondary. Prevention of stretch marks using topical ointments and oils is debatable. Treatment of striae rubrae by lasers and light devices improves appearance. Microneedling and non-ablative and fractionated lasers have been used. This review provides an overview on current treatment options with a special focus on laser treatments.

Phrynoderma and acquired acrodermatitis enteropathica in breastfeeding women after bariatric surgery

BACKGROUND AND OBJECTIVES

Women who have undergone bariatric surgery are susceptible to nutritional deficiencies in subsequent pregnancies. We highlight the importance of dermatologists in the early recognition of cutaneous signs of malnutrition occurring in this specific clinical setting.

PATIENTS AND METHODS

We compare clinical characteristics of two young women with dermatological signs of combined post-gestational nutritional deficiencies following Roux-en-Y gastric bypass surgery.

RESULTS

Patient 1 exhibited follicular papules on the extremities, perianal eczema, perlèche, alopecia, and depigmentation of hair. Patient 2 showed erythematous plaques in genitoanal and acral areas, perlèche, diffuse alopecia, and depigmentation of hair. Based on clinical and histopathological findings, decreased vitamin A (patient 1) and zinc levels (patient 2), we diagnosed phrynoderma and acquired acrodermatitis enteropathica, respectively. Comparison of the two patients revealed that both (i) were lacking follow-up after gastric bypass surgery, (ii) developed skin lesions as primary symptoms with (iii) mixed clinical manifestations due to combined deficiencies, and (iv) experienced initial symptoms during lactation suggesting a causal relationship.

CONCLUSIONS

Our observations highlight the potentially increased risk of women to develop post-gestational dermatological manifestations of malnutrition following bariatric surgery. The awareness of dermatologists with respect to this emerging, susceptible patient group may help avert damage to mother and child.