Late-stage melanoma looks dramatically different from an early mole. The primary tumor is often thick, raised, and multicolored, frequently with open sores that bleed or crust over. Beyond the original spot, late-stage melanoma produces visible changes elsewhere on the body: new skin nodules, swollen lymph nodes, and symptoms tied to spread in the lungs, liver, brain, or bones.
“Late stage” generally refers to Stage III, where melanoma has reached nearby lymph nodes or produced satellite skin lesions, and Stage IV, where it has spread to distant organs. The five-year survival rate is roughly 60% for Stage III and about 16% for Stage IV, though newer treatments are steadily improving those numbers.
Changes at the Original Tumor Site
Early melanomas are often flat and follow the familiar ABCDE pattern: asymmetry, irregular borders, multiple colors, a diameter over 6 mm, and evolving shape or size. By late stages, the primary lesion has typically grown well beyond that checklist. It may be a raised, dome-shaped nodule rather than a flat spot. Colors can range across brown, black, blue, red, and even white within a single lesion. The borders become increasingly ragged and blurred.
One of the most telling visual signs of an aggressive primary tumor is ulceration, where the skin over the melanoma breaks down entirely. This creates an open wound that may ooze, bleed spontaneously, or develop a persistent crust that doesn’t heal. Ulceration isn’t just cosmetic. It signals a biologically more aggressive tumor with a higher likelihood of spreading. The staging system treats ulcerated melanomas as a category worse than non-ulcerated ones of the same thickness.
Nodular melanoma, the subtype most likely to be diagnosed at a late stage, grows vertically from the start rather than spreading outward across the skin’s surface. Patients have described these tumors changing from flat to raised in as little as two weeks, shifting from brownish to jet black in a “dripping” pattern. They often feel firm or dome-like to the touch.
Satellite Lesions and In-Transit Metastases
One of the most distinctive visible signs of advancing melanoma is the appearance of new spots near the original tumor. These fall into two categories based on distance. Satellite lesions appear within 2 cm of the primary melanoma. In-transit metastases show up more than 2 cm away but haven’t yet reached the nearest lymph node basin. Both represent cancer cells traveling through the skin’s lymphatic channels.
These metastases typically look like small blue, blue-gray, or dark macules (flat spots) or firm nodules on the skin surface. In clinical reports, patients have developed clusters of six to eight blue-gray spots scattered across the skin near an excision scar. Under magnification, these spots show branching blue or red-blue lines that correspond to melanoma cells moving through lymphatic or blood vessels in the skin. To the naked eye, they can resemble bruises, new moles, or blue-tinted bumps that weren’t there before.
Swollen Lymph Nodes
Stage III melanoma is defined by spread to regional lymph nodes. You might feel firm, enlarged lumps in the groin, armpit, or neck, depending on where the original melanoma was located. Unlike the soft, tender lymph nodes you get with an infection, melanoma-involved nodes tend to feel hard and are typically painless. They may be fixed in place rather than rolling under your fingernails when you press on them.
In some cases the swelling is subtle and only detectable on imaging. In others, the nodes become bulky enough to see or feel easily through the skin. Inguinal nodes (in the groin) are a common site when the primary melanoma was on the leg or lower trunk.
The Melanoma That Doesn’t Look Like Melanoma
Not all late-stage melanomas are dark. Amelanotic melanoma produces little or no pigment, making it one of the most commonly misdiagnosed skin cancers. Instead of the expected brown or black, these tumors appear pink, red, or skin-colored. About half present as red lesions, another 35% as pink, and the rest as a general reddish tone. They’re frequently mistaken for basal cell carcinoma, eczema, a bug bite, or even a benign blood blister.
Because they don’t match the classic “dark mole” image, amelanotic melanomas are correctly suspected to be melanoma in only about 32% of cases at first clinical evaluation, compared to 94% for pigmented melanomas. This diagnostic delay means they’re more likely to reach an advanced stage before treatment begins. By that point, the lesion is often nodular, raised, and ulcerated. The mnemonic “Red, Raised, Recent change” was proposed specifically to help catch these atypical cases.
Melanoma in Hidden Locations
Acral lentiginous melanoma develops on the palms, soles of the feet, and under fingernails or toenails. It’s the most common melanoma subtype in people with darker skin tones and is frequently diagnosed late because these areas aren’t routinely checked.
On the hands or feet, it begins as a patch of light to dark brown pigment with angular, irregular edges that follow the skin’s natural ridgelines. A useful visual clue: benign moles on the palms and soles tend to have pigment concentrated in the skin furrows (the creases), while melanoma pigment sits on the elevated ridges.
Under a nail, melanoma may appear as a dark longitudinal stripe running from the cuticle to the tip, diffuse darkening of the entire nail, or (in advanced cases) destruction and ulceration of the nail itself. The thumb and great toe account for 92% of subungual cases. A particularly important warning sign is Hutchinson’s sign, where dark pigment extends from under the nail into the surrounding skin fold. In advanced lesions, this pigment spreads further onto the adjacent skin of the finger or toe.
What Stage IV Looks Like Beyond the Skin
Stage IV melanoma has spread to distant parts of the body. The most common destination is distant skin and soft tissue, which can produce firm, dark or skin-colored nodules far from the original tumor site. Beyond the skin, the organs most frequently affected are the lungs, liver, bones, and brain.
Lung metastases are the most common cause of death in Stage IV melanoma. Symptoms include a persistent cough, shortness of breath, and chest discomfort. Liver involvement may cause pain under the right ribcage, unexplained weight loss, loss of appetite, or yellowing of the skin and eyes. Bone metastases produce deep, persistent pain in the affected area, most commonly the spine, pelvis, or long bones.
Brain metastases are particularly common with melanoma, which has a notable tendency to spread to the central nervous system. Symptoms depend on the location and size of the metastases but can include headaches, seizures, vision changes, weakness on one side of the body, confusion, or personality changes. Bleeding within brain metastases is found in most patients with melanoma that reaches the brain, which can cause sudden, severe neurological symptoms.
Widespread disease also produces general signs: unintended weight loss, persistent fatigue, and a general feeling of being unwell that doesn’t resolve with rest. These systemic symptoms often prompt imaging studies that reveal the extent of metastatic spread.