Modified single-sling myocutaneous island pedicle flap: series of 61 reconstructions.

BACKGROUND: Bilevel undermining above and below the transverse nasalis muscle in the construction of a myocutaneous island pedicle flap produces a bilateral or unilateral muscular sling with exceptional vascular supply for reconstruction of defects on the distal nose. We present further modification of the single-sling myocutaneous island pedicle flap that expands its application to a wide variety of nasal defects and further defines its usefulness in nasal reconstruction. METHODS: A series of 61 consecutive myocutaneous island pedicle flap reconstructions performed after Mohs surgery between March 2005 and July 2006 are presented. Flap modifications are presented, and advantages and limitations are discussed. RESULTS: Flap modifications introduce additional reach and rotational mobility to the flap that permit extension of the flap to defects on the nasal tip and distal ala. CONCLUSION: Modifications of the bilevel approach to the single-sling nasalis myocutaneous island pedicle flap further define its practicality in nasal reconstruction and expand its application to a variety of nasal defects.

Fusiform elliptical Burow's graft: a simple and practical esthetic approach for nasal tip reconstruction.

BACKGROUND: Reconstruction of cutaneous nasal tip and supratip defects presents a common challenge in which esthetic outcomes are dependent on appropriate flap or graft selection and execution. OBSERVATION: We describe the fusiform elliptical Burow's graft, a modified full-thickness skin graft, for repair of moderately sized nasal tip and supratip defects. It has the advantage of being a one-stage procedure with incisions and undermining similar to a primary closure. This technique allows the defect to become smaller in size and shallower in depth while taking the shape of a fusiform ellipse confined to a single cosmetic subunit. The color and texture match of the adjacent Burow's skin graft combined with its fusiform elliptical shape allow it to blend in more naturally with the nasal tip contour compared with the traditional circular-shaped Burow's graft, which is typically used on the nose. CONCLUSION: The fusiform elliptical Burow's graft is a simple, reliable, easily reproducible, and esthetically pleasing technique for repair of defects on the nasal tip and supratip.

Surgical revision.

Even the best surgeons must confront scars and complications that are aesthetically unacceptable and need revision. With careful assessment of the scar, various scar revision techniques can be applied to create an aesthetically pleasing result.

Sentinel lymph node biopsy.

The introduction of sentinel lymph node biopsy (SLNB) has been an important development in the management of malignant melanoma. Lymph nodes have long been known to play a key role in melanoma metastasis. The importance of nodal staging accounted for the previous surgical practice of elective lymph node dissection (ELND) even with its controversial impact on final outcomes and associated morbidity. Although this morbidity has been reduced with the ability to identify the SLN, numerous questions have subsequently surfaced with respect to this procedure's utility and therapeutic efficacy. This chapter will focus on the indications for SLNB, as well as the current controversies surrounding this procedure.

Biopsy techniques. Diagnosis of melanoma.

The biopsy of a suspicious pigmented lesion is critical to establishing a correct and complete diagnosis. It allows the dermatopathologist accurately to diagnose melanoma and to gauge maximum depth of invasion (and other histologic criterion). This, in turn, influences the extent of further necessary surgery or other adjuvant therapy. Furthermore, choosing the appropriate biopsy technique provides adequate cosmetic results, bearing in mind that the excisional technique is ideal because it removes the suspicious lesion en toto. Excisional biopsies should extend to the subcutaneous fat by means of a punch biopsy, a fusiform ellipse, or a saucerization. Incisional biopsies can be performed in certain circumstances, but should be done so with caution because sampling error may lead to missed diagnosis or inaccurate histologic criterion, such as depth.

Reduction of expression of tuberin, the tuberous-sclerosis-complex-gene-2 product in tuberous sclerosis complex associated connective tissue nevi and sporadic squamous and basal cell carcinomas.

BACKGROUND: Patients affected with tuberous sclerosis complex (TSC) are prone to the development of multiple benign tumors of the skin and other organs. Tuberin, the protein product of the tuberous-sclerosis-complex-2 tumor suppressor gene (TSC2) has been shown to inhibit cell proliferation. In TSC associated kidney tumors and sporadic brain tumors the loss/reduction of tuberin has been shown. METHODS: Specimens of nine squamous cell carcinomas (SCC) and five basal cell carcinomas (BCC) from patients without TSC and six biopsies of connective tissue nevi (CTN) of patients with TSC were obtained. Specimens were analyzed by immunoblotting for the expression of tuberin. RESULTS: Absent or reduced levels of tuberin were detected in the dermal parts of three of six shagreen patches, two of five BCC, and four of nine SCC. CONCLUSIONS: In tumors/hamartomas of patients with TSC the complete loss of TSC2 and tuberin is a mechanism which could be shown for CTN, thereby excluding the possibility of haploinsufficiency of TSC2. In a substantial number of cutaneous BCC and SCC the loss or downregulation of tuberin seems to be epigenetic, as alterations of TSC2 are not known in these tumors. The absence or reduction of tuberin might contribute to their proliferation.