Keratoacanthoma

Age: 61 years
Gender: Male
Site: Lower lip
Duration: 3 months
Morphology: An asymptomatic, solitary, dome-shaped nodule with keratotic surface. Excisional biopsy revealed KA.

Basal cell carcinoma

Age: 80 years
Gender: Female
Site: Nose
Duration: 1 year
History: A small persistent crusted erosion with with no tendency for spontaneous healing or resolution. Excisional biopsy confirmed BCC.

Keratoacanthoma

Age: 50 years
Gender: Male
Site: Lower lip
Duration: 3 months
Morphology: An asymptomatic, solitary, well-circumscribed, dome-shaped, pinkish, crusted nodule about one cm diameter. Excisional biopsy showed KA.

Multiple neuorofibromas

Age: 38 years
Gender: Female
Site: Back
Duration: 20 years
Morphology: Myriad of asymptomatic, flesh-colored, soft nodules with buttonholing sign. These begnin skin tumors were associated with multiple cafe-au-lait patches. 

Mycosis fungoides

Age: 46 years
Gender: Female
Site: Leg
Duration: 9 months
History: An asymptomatic, solitary, indurated and infiltrative crusted plaque having an inverted-heart shape with more activity on the marginal zone than the center.

Recurrent BCC

Age: 78 years
Gender: Male
Site: Scalp
Duration: 1 year
History: 11 years ago this man had BCC on his scalp removed surgically. Now he presents with a noduloulcerative lesion with beefy red base and pigmented rolled up border at the same site of previous lesion. Biopsy confirmed BCC.

B-cell lymphoma

Age: 69 years
Gender: Male
Site: Face & Trunk
Duration: > 2 years
History: Asymptomatic, firm to hard, infiltrative, dull red plaques and nodules. Lymph nodes enlargement and hepatomegally were positive. 

Multiple trichoepitheliomas

Age: 20 years
Gender: Female
Site: Face
Duration: Since puberty
Morphology: Asymptomatic, multiple, firm, translucent papules involved the midface especially the nasolabial folds.

Recurrent BCC

Age: 68 years
Gender: Male
Site: Scalp
Duration: Recurrent (Decades)
History: At 1950s the patient was treated with radiation therapy for favus (the treatment available for tinea capitis at that time). Many decades later (1990s) he developed BCC on his atrophic scalp. This time it was treated with surgical excision. Three years later it recurred and treated with an unwise decision with radiation therapy (10 sessions ). Now he presented with a large pigmented plaque having slightly raised border.

Bowen's disease

Age: 75 years

Gender: Female (Russian woman)

Site: Back

Duration: > 5 years.

Morphology: An asymptomatic, slowly-enlarging, well-circumscribed, slightly-infiltrative, large psoriasiform plaque. Skin biopsy showed typical histologic changes of Bowen's disease.

Advanced BCC in XP

Age: 66 years
Gender: Female
Site: Nose
Duration: 5 years
Morphology: Multiple BCCs involving the face of this woman with xeroderma pigmentosum. The main one was phagedenic ulcer with characteristic rolled up border. It has destroyed most of the nose and exposed its interior.