Anaemia in an Adult Indian Man Always Needs a Full Investigation

Iron-deficiency anaemia is the default diagnosis for a tired, pale patient in most Indian clinics. In women of reproductive age, it is often correct. In an adult man, it is almost always a clue pointing somewhere else.

Men do not have monthly blood loss. They do not carry a pregnancy. Their iron stores, once built, should stay built. When a man's haemoglobin drops, the question is not how to raise it, the question is where the iron went, or why the body stopped making enough red cells in the first place. Handing him a ferrous sulphate tablet without that answer is treating the smoke and ignoring the fire.

The gastrointestinal tract is the first place a physician looks in an anaemic man, and for good reason. Slow, chronic bleeding from the stomach or colon can drain iron stores over months without a single episode of visible blood in the stool. Peptic ulcers, erosions from long-term NSAID use, hookworm infestation, still endemic in parts of rural India, and colorectal polyps or carcinoma can all bleed silently.

A stool occult blood test is the minimum starting point. An upper GI endoscopy and a colonoscopy are often both necessary, because a negative finding in one segment does not rule out the other. In India, where colorectal cancer incidence is rising and where hookworm remains underdiagnosed in adults who grew up without consistent footwear or sanitation access, skipping this step is a clinical error.

Not every anaemia in a man is iron-deficiency. The blood picture matters. A low MCV points toward iron deficiency or thalassaemia trait. A high MCV points toward B12 or folate deficiency, both common in strict vegetarians, a significant share of the Indian male population. A normal MCV with a low haemoglobin opens a different list: chronic kidney disease, hypothyroidism, bone marrow suppression, or anaemia of chronic inflammation from an underlying infection or autoimmune condition.

Each of these has a different treatment and a different underlying cause. Treating B12 deficiency with iron does nothing. Treating anaemia of chronic kidney disease with either misses the kidney disease progressing in the background. A complete blood count with indices, a peripheral blood smear, reticulocyte count, serum iron, TIBC, ferritin, B12, folate, and a renal and thyroid panel are not excessive, they are the minimum needed to tell these apart.

Haematological malignancies, leukaemias, lymphomas, multiple myeloma, can present as anaemia before any other symptom appears. This is not the most common cause, but it is the one that costs a man his life if the investigation stops at a low haemoglobin and a prescription for iron.

A peripheral smear read by a trained eye, LDH, uric acid, and protein electrophoresis in the right clinical context are the screens that catch this early. A haematologist's input is warranted when the picture does not fit a simple nutritional deficiency or when the anaemia does not respond to treatment as expected.

The Indian Council of Medical Research and the haematology guidelines followed by most tertiary centres in India are consistent on this: anaemia in an adult male is a symptom, not a diagnosis. The workup runs in two directions simultaneously, characterise the anaemia precisely, and search for the source or cause.

That means a detailed dietary and drug history, examination for lymphadenopathy, hepatosplenomegaly, and rectal examination, alongside the laboratory panel described above. It means not stopping at the first positive finding if the clinical picture does not fully fit. A man can have both a hookworm load and a colonic polyp. He can have both B12 deficiency and early chronic kidney disease.

An iron supplement that raises the haemoglobin by two points over six weeks is not a successful outcome if no one established why it was low. The number went up. The cause stayed.

Anaemia in an adult man is the body registering a problem it cannot fix on its own. The investigation is not a formality, it is the treatment.